subject:(Sampled data control)

University of Houston

1. Ramezanifar, Amin 1981-. Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay.

Degree: PhD, Mechanical Engineering, 2013, University of Houston

► In this dissertation we address a variety of problems in filtering and control of dynamic systems with emphasis on their digital implementation. We focus on… (more)

▼ In this dissertation we address a variety of problems in filtering and control of dynamic systems with emphasis on their digital implementation. We focus on linear parameter varying (LPV) systems which have been widely utilized in engineering applications. LPV systems include a class of linear systems whose dynamic depends on time-varying parameters. These systems have resulted in significant improvements in the study of time-varying and nonlinear systems. In a filtering problem, we aim to estimate the states of a dynamic system by utilizing the output measurement of the system. Applications of filters abound in practical and theoretical problems. In a control problem, the objective is to design a controller to ensure the closed-loop system stability and often to satisfy a prescribed level of performance. A main concern in the present study is the implementation of the controller or filter which is often fulfilled by means of a digital device operating in the discrete time domain. Due to the combination of the system continuous-time dynamics and the controller or filter discrete dynamics connected through analog to digital and digital to analog converter devices, the closed-loop system is a hybrid one and is difficult to analyze mathematically. The incorporation of continuous-time and discrete-time signals in a system is often referred to as sampled-data system. A particular difficulty in sampled-data systems is to ensure that the digital controller (filter) meets the design specifications in between the samples. In this dissertation, we develop new methods to take into account this requirement. Two chapters of this dissertation are devoted to the design of filters for LPV systems. First, we design a continuous-time filter for a continuous-time state-delayed LPV system whose dynamics includes a time varying delay. Next, we address the sampled-data filter design problem for continuous-time LPV systems. In the second part of this dissertation, we investigate the control problem of LPV systems in the framework of sampled-data design. First we present a new approach for the sampled-data control of continuous-time LPV systems. Next, we extend the established results for LPV systems with internal delay. Advisors/Committee Members: Grigoriadis, Karolos M. (advisor), Franchek, Matthew A. (committee member), Song, Gangbing (committee member), Nikolaou, Michael (committee member), Rao, Jagannatha R. (committee member), Provence, Robert S. (committee member).

Subjects/Keywords: Linear parameter varying (LPV) systems; Sampled-Data Filtering; Sampled-Data Control; Stability Analysis; Time Delay

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APA (6^th Edition):

Ramezanifar, A. 1. (2013). Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/1381

Chicago Manual of Style (16^th Edition):

Ramezanifar, Amin 1981-. “Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay.” 2013. Doctoral Dissertation, University of Houston. Accessed April 11, 2021. http://hdl.handle.net/10657/1381.

MLA Handbook (7^th Edition):

Ramezanifar, Amin 1981-. “Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay.” 2013. Web. 11 Apr 2021.

Vancouver:

Ramezanifar A1. Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay. [Internet] [Doctoral dissertation]. University of Houston; 2013. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10657/1381.

Council of Science Editors:

Ramezanifar A1. Sampled-Data Filtering and Control of Linear Parameter Varying Systems with Delay. [Doctoral Dissertation]. University of Houston; 2013. Available from: http://hdl.handle.net/10657/1381

University of Waterloo

2. Rudko, Volodymyr. Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants.

Degree: 2013, University of Waterloo

URL: http://hdl.handle.net/10012/7775

► In adaptive control the goal is to deal with systems that have unknown and/or time-varying parameters. Adaptive control techniques have been developed since 1950’s and… (more)

Subjects/Keywords: adaptive control; time-varying systems; sampled-data; nonlinear

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APA (6^th Edition):

Rudko, V. (2013). Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7775

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rudko, Volodymyr. “Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants.” 2013. Thesis, University of Waterloo. Accessed April 11, 2021. http://hdl.handle.net/10012/7775.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rudko, Volodymyr. “Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants.” 2013. Web. 11 Apr 2021.

Vancouver:

Rudko V. Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10012/7775.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rudko V. Nonlinear Periodic Adaptive Control for Linear Time-Varying Plants. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7775

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle

3. Carrasco Yanez, Diego S. Uncertainty issues in deterministic and stochastic nonlinear systems.

Degree: PhD, 2014, University of Newcastle

URL: http://hdl.handle.net/1959.13/1049172

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Research Doctorate - Doctor of Philosophy (PhD)

Robustness issues arise in every real world control problem. The objective of any robust control strategy is to… (more)

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Research Doctorate - Doctor of Philosophy (PhD)

Robustness issues arise in every real world control problem. The objective of any robust control strategy is to preserve closed-loop stability in situations where the real plant differs from the model used to design the controller, i.e. the real system is, in some sense, unknown. There are different ways to quantify, or describe, the uncertainty of a model. It is the amount of uncertainty, or lack of confidence in the model, that ultimately determines, and constrains, what the closed-loop can achieve. In this thesis we address particular issues concerned with how to quantify and reduce the impact of uncertainty. To this end, the present thesis is divided in two parts: The first part is aimed at linear systems. We propose two ideas on how to improve closed-loop performance in the face of general uncertainty, namely, (i) augmenting the control architecture with a feedforward component and (ii) augmenting the observer architecture by using the more general class of unbiased observers. We then illustrate the first strategy applied to an Artificial Pancreas problem. The second part is aimed at nonlinear systems. A common source of uncertainty in this area is the use of approximate sampled-data models of continuous time systems, be it for control design or system identifcation. This is due to the fact that, contrary to the linear case, exact discretisations are not generally possible in the nonlinear case. In particular, we deal with the sampled-data scenario in both deterministic and stochastic cases and focus our attention on accuracy and related properties of sampled-data models. We first study the accuracy properties, or error dynamics, of a particular deterministic sampled data model, and show that it possesses an improved order of accuracy when compared to the usual Euler approximation. We then demonstrate the usefulness of having such a quantification via several applications, namely, (i) obtaining better bias-variance tradeoffs in the parameter estimation of continuous-time systems from sampled-data, (ii) obtaining a sampled-data model that depends only on input-output data that retains the improved order of accuracy, and (iii) obtaining better performance in high-gain sampled-data feedback control of nonlinear systems, via feedback lineraisation. In addition, we extend the analysis to stochastic sampled-data nonlinear systems. In this case, we show that the error dynamics are tightly intertwined with other system properties that arise due to the sampling process. In particular, we show the existence of stochastic sampling zero dynamics that are closely related to the sampling zero dynamics associated with the deterministic case.

Advisors/Committee Members: University of Newcastle..

Subjects/Keywords: nonlinear systems; closed-loop stability; sampled-data models; control design

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Carrasco Yanez, D. S. (2014). Uncertainty issues in deterministic and stochastic nonlinear systems. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1049172

Chicago Manual of Style (16^th Edition):

Carrasco Yanez, Diego S. “Uncertainty issues in deterministic and stochastic nonlinear systems.” 2014. Doctoral Dissertation, University of Newcastle. Accessed April 11, 2021. http://hdl.handle.net/1959.13/1049172.

MLA Handbook (7^th Edition):

Carrasco Yanez, Diego S. “Uncertainty issues in deterministic and stochastic nonlinear systems.” 2014. Web. 11 Apr 2021.

Vancouver:

Carrasco Yanez DS. Uncertainty issues in deterministic and stochastic nonlinear systems. [Internet] [Doctoral dissertation]. University of Newcastle; 2014. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1959.13/1049172.

Council of Science Editors:

Carrasco Yanez DS. Uncertainty issues in deterministic and stochastic nonlinear systems. [Doctoral Dissertation]. University of Newcastle; 2014. Available from: http://hdl.handle.net/1959.13/1049172

York University

4. Liu, Lei. Cooperative Control of Nonlinear Multi-Agent Systems.

Degree: PhD, Earth & Space Science, 2016, York University

URL: http://hdl.handle.net/10315/32733

► Multi-agent systems have attracted great interest due to their potential applications in a variety of areas. In this dissertation, a nonlinear consensus algorithm is developed… (more)

▼ Multi-agent systems have attracted great interest due to their potential applications in a variety of areas. In this dissertation, a nonlinear consensus algorithm is developed for networked Euler-Lagrange multi-agent systems. The proposed consensus algorithm guarantees that all agents can reach a common state in the workspace. Meanwhile, the external disturbances and structural uncertainties are fundamentally considered in the controller design. The robustness of the proposed consensus algorithm is then demonstrated in the stability analysis. Furthermore, experiments are conducted to validate the effectiveness of the proposed consensus algorithm. Next, a distributed leader-follower formation tracking controller is developed for networked nonlinear multi-agent systems. The dynamics of each agent are modeled by Euler-Lagrange equations, and all agents are guaranteed to track a desired time-varying trajectory in the presence of noise. The fault diagnosis strategy of the nonlinear multi-agent system is also investigated with the help of differential geometry tools. The effectiveness of the proposed controller is verified through simulations. To further extend the application area of the multi-agent technique, a distributed robust controller is then developed for networked Lipschitz nonlinear multi-agent systems. With the appearance of system uncertainties and external disturbances, a sampled-data feedback control protocol is carried out through the Lyapunov functional approach. The effectiveness of the proposed controller is verified by numerical simulations. Other than the robustness and sampled-data information exchange, this dissertation is also concerned with the event-triggered consensus problem for the Lipschitz nonlinear multi-agent systems. Furthermore, the sufficient condition for the stochastic stabilization of the networked control system is proposed based on the Lyapunov functional method. Finally, simulation is conducted to demonstrate the effectiveness of the proposed control algorithm. In this dissertation, the cooperative control of networked Euler-Lagrange systems and networked Lipschitz systems is investigated essentially with the assistance of nonlinear control theory and diverse controller design techniques. The main objective of this work is to propose realizable control algorithms for nonlinear multi-agent systems. Advisors/Committee Members: Shan, Jinjun (advisor).

Subjects/Keywords: Mathematics; Control theory; Consensus; Cooperative control; Robust control; Nonlinear control; Synchronization; Multi-agent systems; Sampled-data control; Fault diagnosis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, L. (2016). Cooperative Control of Nonlinear Multi-Agent Systems. (Doctoral Dissertation). York University. Retrieved from http://hdl.handle.net/10315/32733

Chicago Manual of Style (16^th Edition):

Liu, Lei. “Cooperative Control of Nonlinear Multi-Agent Systems.” 2016. Doctoral Dissertation, York University. Accessed April 11, 2021. http://hdl.handle.net/10315/32733.

MLA Handbook (7^th Edition):

Liu, Lei. “Cooperative Control of Nonlinear Multi-Agent Systems.” 2016. Web. 11 Apr 2021.

Vancouver:

Liu L. Cooperative Control of Nonlinear Multi-Agent Systems. [Internet] [Doctoral dissertation]. York University; 2016. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10315/32733.

Council of Science Editors:

Liu L. Cooperative Control of Nonlinear Multi-Agent Systems. [Doctoral Dissertation]. York University; 2016. Available from: http://hdl.handle.net/10315/32733

University of Newcastle

5. Cea Garrido, Mauricio Esteban. Sampling and quantization in nonlinear filtering and control.

Degree: 2012, University of Newcastle

URL: http://hdl.handle.net/1959.13/935346

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Research Doctorate - Doctor of Philosophy

The thesis describes contributions made in two areas, namely, aspects of nonlinear filtering and control over communication channels. Specifically,… (more)

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Research Doctorate - Doctor of Philosophy

The thesis describes contributions made in two areas, namely, aspects of nonlinear filtering and control over communication channels. Specifically, the thesis is concerned with addressing the impact of temporal and spatial quantization on the performance of estimation and control algorithms. Regarding nonlinear filtering, emphasis is placed on technical and theoretical issues regarding the impact of sampling and spatial quantization. New techniques of upsampling and downsampling are developed to address specific computational issues. Also, extensions to Lebesgue sampling are explored. In addition, a new class of nonlinear filtering algorithms, called Minimum Distortion Filters, is developed based on the use of Vector Quantization. The effectiveness of the new filtering algorithms are illustrated, by using it on a wide variety of problems including system identification, state estimation for chemical processes and radar tracking. Regarding control over communication channels, the focus is primarily on the practical problem of inner loop power control in broadband WCDMA. This control loop is characterized by the use of a one-bit-per-sample control law. This restriction severely limits the achievable performance. To address the problem, a novel adaptive quantizer is developed in the thesis. The scheme is shown to lead to significant performance improvements. The scheme has also been extended and applied to the problem of stabilizing an open loop unstable system over a bit rate constrained channel. Other control problems in WCDMA are also explored including the use of the "Happy Bit" to signal buffer sizes for the purposes of scheduling. This control loop is also subject to a one-bit-per-sample constraint. Typically, the one bit is used for a different purpose in current implementations. Here we develop an adaptive scheme based on the Happy Bit for communicating the buffer size.

Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science.

Subjects/Keywords: nonlinear filtering; quantization; sampled data; nonlinear MPC; WCDMA; networked control; constrained bit rate

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cea Garrido, M. E. (2012). Sampling and quantization in nonlinear filtering and control. (Thesis). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/935346

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cea Garrido, Mauricio Esteban. “Sampling and quantization in nonlinear filtering and control.” 2012. Thesis, University of Newcastle. Accessed April 11, 2021. http://hdl.handle.net/1959.13/935346.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cea Garrido, Mauricio Esteban. “Sampling and quantization in nonlinear filtering and control.” 2012. Web. 11 Apr 2021.

Vancouver:

Cea Garrido ME. Sampling and quantization in nonlinear filtering and control. [Internet] [Thesis]. University of Newcastle; 2012. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1959.13/935346.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cea Garrido ME. Sampling and quantization in nonlinear filtering and control. [Thesis]. University of Newcastle; 2012. Available from: http://hdl.handle.net/1959.13/935346

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University

6. Baloch, Mahvash. A Compositional Approach for Verifying Sampled-Data Supervisory Control.

Degree: MSc, 2012, McMaster University

URL: http://hdl.handle.net/11375/11959

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Sampled-data supervisory control deals with timed discrete event systems (TDES) where the supervisors are to be implemented as sampled-data controllers. A sampled-data controller views… (more)

Subjects/Keywords: Discrete Event Systems; Supervisory Control; Sampled Data Supervisory Control; Compositional Verification; Controls and Control Theory; Controls and Control Theory

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Baloch, M. (2012). A Compositional Approach for Verifying Sampled-Data Supervisory Control. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/11959

Chicago Manual of Style (16^th Edition):

Baloch, Mahvash. “A Compositional Approach for Verifying Sampled-Data Supervisory Control.” 2012. Masters Thesis, McMaster University. Accessed April 11, 2021. http://hdl.handle.net/11375/11959.

MLA Handbook (7^th Edition):

Baloch, Mahvash. “A Compositional Approach for Verifying Sampled-Data Supervisory Control.” 2012. Web. 11 Apr 2021.

Vancouver:

Baloch M. A Compositional Approach for Verifying Sampled-Data Supervisory Control. [Internet] [Masters thesis]. McMaster University; 2012. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/11375/11959.

Council of Science Editors:

Baloch M. A Compositional Approach for Verifying Sampled-Data Supervisory Control. [Masters Thesis]. McMaster University; 2012. Available from: http://hdl.handle.net/11375/11959

University of Lund

7. Thelander Andrén, Marcus. On LQG-Optimal Event-Based Sampling.

Degree: 2020, University of Lund

URL: https://lup.lub.lu.se/record/8f3af775-387f-48ea-8b88-f9a9fb56c582 ; https://portal.research.lu.se/ws/files/86986914/thesis.pdf

► Event-based control is a promising concept for the design of resource-efficient feedback systems, where events such as sampling, actuation, and data transmissions are triggered reactively… (more)

▼ Event-based control is a promising concept for the design of resource-efficient feedback systems, where events such as sampling, actuation, and data transmissions are triggered reactively based on monitored control performance rather than a periodic timer. In this thesis, we investigate how sampling and communication events should be triggered to fully exploit the potential of event-based control based on the classic linear–quadratic–Gaussian (LQG) framework.The design of the event trigger is formulated as a trade-off between a quadratic cost on control performance and the average event rate. The optimal event trigger is well-known for first-order systems, where it corresponds to a scalar symmetric threshold on the monitored control performance. In this thesis, we consider systems of higher order, where the shape of the optimal threshold is generally unknown. For two new system classes with previously unknown solutions, we prove that the optimal threshold is ellipsoidal for all system orders. Additionally, we propose two numerical methods for finding the optimal threshold shape for general systems.Suboptimal but simpler designs in the form of event-based proportional–integral–derivative (PID) control are also considered. Inspired by results from LQG-optimal sampled-data control, we derive an “ideal” (in the LQG sense) sampled-data PID implementation, from which a range of design options of varying complexity for event-based PID control is proposed. Based on numerical evaluations, we present a proposal implementation that strikes a balance between performance and simplicity. Finally, this thesis also considers stochastic triggering, where events are triggered according to a certain probability. Two policies for stochastic triggering are proposed for a remote state estimation problem, both featuring predictions in the sensor for improved estimation performance. Both policies compare well to other proposals from the literature, and one of the policies also offers significantly simpler performance analysis.

Subjects/Keywords: Control Engineering; Event-based control; LQG control; sampled-data control; Stochastic control; Event-based PID control; Event-based state estimation; stochastic triggering

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APA (6^th Edition):

Thelander Andrén, M. (2020). On LQG-Optimal Event-Based Sampling. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/8f3af775-387f-48ea-8b88-f9a9fb56c582 ; https://portal.research.lu.se/ws/files/86986914/thesis.pdf

Chicago Manual of Style (16^th Edition):

Thelander Andrén, Marcus. “On LQG-Optimal Event-Based Sampling.” 2020. Doctoral Dissertation, University of Lund. Accessed April 11, 2021. https://lup.lub.lu.se/record/8f3af775-387f-48ea-8b88-f9a9fb56c582 ; https://portal.research.lu.se/ws/files/86986914/thesis.pdf.

MLA Handbook (7^th Edition):

Thelander Andrén, Marcus. “On LQG-Optimal Event-Based Sampling.” 2020. Web. 11 Apr 2021.

Vancouver:

Thelander Andrén M. On LQG-Optimal Event-Based Sampling. [Internet] [Doctoral dissertation]. University of Lund; 2020. [cited 2021 Apr 11]. Available from: https://lup.lub.lu.se/record/8f3af775-387f-48ea-8b88-f9a9fb56c582 ; https://portal.research.lu.se/ws/files/86986914/thesis.pdf.

Council of Science Editors:

Thelander Andrén M. On LQG-Optimal Event-Based Sampling. [Doctoral Dissertation]. University of Lund; 2020. Available from: https://lup.lub.lu.se/record/8f3af775-387f-48ea-8b88-f9a9fb56c582 ; https://portal.research.lu.se/ws/files/86986914/thesis.pdf

University of Newcastle

8. Yuz Eissmann, Juan Ignacio. Sampled-data models for linear and nonlinear systems.

Degree: 2006, University of Newcastle

URL: http://hdl.handle.net/1959.13/24852

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Continuous-time systems are usually modelled by differential equations arising from physical laws. However, the use of these models in practice requires discretisation. In this thesis… (more)

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Continuous-time systems are usually modelled by differential equations arising from physical laws. However, the use of these models in practice requires discretisation. In this thesis we consider sampled-data models for linear and nonlinear systems. We study some of the issues involved in the sampling process, such as the accuracy of the sampled-data models, the artifacts produced by the particular sampling scheme, and the relations to the underlying continuous-time system. We review, extend and present new results, making extensive use of the delta operator which allows a clearer connection between a sampled-data model and the underlying continuous-time system. In the first part of the thesis we consider sampled-data models for linear systems. In this case exact discrete-time representations can be obtained. These models depend, not only on the continuous-time system, but also on the artifacts involved in the sampling process, namely, the sample and hold devices. In particular, these devices play a key role in determining the sampling zeros of the discrete-time model. We consider robustness issues associated with the use of discrete-time models for continuous-time system identification from sampled data. We show that, by using restricted bandwidth frequency domain maximum likelihood estimation, the identification results are robust to (possible) under-modelling due to the sampling process. Sampled-data models provide a powerful tool also for continuous-time optimal control problems, where the presence of constraints can make the explicit solution impossible to find. We show how this solution can be arbitrarily approximated by an associated sampled-data problem using fast sampling rates. We also show that there is a natural convergence of the singular structure of the optimal control problem from discrete- to continuous-time, as the sampling period goes to zero. In Part II we consider sampled-data models for nonlinear systems. In this case we can only obtain approximate sampled-data models. These discrete-time models are simple and accurate in a well defined sense. For deterministic systems, an insightful observation is that the proposed model contains sampling zero dynamics. Moreover, these correspond to the same dynamics associated with the asymptotic sampling zeros in the linear case. The topics and results presented in the thesis are believed to give important insights into the use of sampled-data models to represent linear and nonlinear continuous-time systems.

PhD Doctorate

Advisors/Committee Members: University of Newcastle. School of Electrical Engineering and Computer Science.

Subjects/Keywords: sampled-data models; nonlinear systems; optimal control

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APA (6^th Edition):

Yuz Eissmann, J. I. (2006). Sampled-data models for linear and nonlinear systems. (Thesis). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/24852

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yuz Eissmann, Juan Ignacio. “Sampled-data models for linear and nonlinear systems.” 2006. Thesis, University of Newcastle. Accessed April 11, 2021. http://hdl.handle.net/1959.13/24852.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yuz Eissmann, Juan Ignacio. “Sampled-data models for linear and nonlinear systems.” 2006. Web. 11 Apr 2021.

Vancouver:

Yuz Eissmann JI. Sampled-data models for linear and nonlinear systems. [Internet] [Thesis]. University of Newcastle; 2006. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1959.13/24852.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yuz Eissmann JI. Sampled-data models for linear and nonlinear systems. [Thesis]. University of Newcastle; 2006. Available from: http://hdl.handle.net/1959.13/24852

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Zani, Antonio. Sincronização de sistemas lur’e com controle amostrado.

Degree: 2018, Brazil

URL: http://hdl.handle.net/10183/187969

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Este trabalho apresenta soluções para o problema de sincronização de sistemas Lur’e mestre-escravo através de uma lei de controle. Inicialmente, o caso de sistemas em… (more)

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Este trabalho apresenta soluções para o problema de sincronização de sistemas Lur’e mestre-escravo através de uma lei de controle. Inicialmente, o caso de sistemas em tempo discreto é formulado com um controle saturante. Em seguida, no caso de sistemas em tempo contínuo, considera-se um controle a partir de dados amostrados (sampled-data control). A sincronização é abordada como um problema de estabilização do erro entre os estados dos sistemas mestre e escravo, e o controle projetado através de um problema de otimização. No caso de sistemas em tempo discreto, a partir de uma função de Lyapunov quadrática e condições de setor, desigualdades matriciais lineares (LMI) são obtidas com o objetivo de garantir que a diferença entre os estados mestre e escravo convirja assintoticamente para zero na ocorrência da saturação do sinal de controle. Condições de estabilidade seguindo uma modelagem por funções zona-morta também são obtidas, no caso particular onde a não linearidade Lur’e é descrita por uma função linear por partes. Um problema de otimização para o projeto do controlador é proposto com o objetivo de maximizar um conjunto de erros iniciais admissíveis, para os quais a sincronização é garantida. Na abordagem via controle amostrado são considerados uma função de Lyapunov do tipo Lur’e e um funcional looped para a obtenção de condições LMI que garantam a sincronização de sistemas mestre-escravo sempre que o intervalo entre duas amostras respeitar um determinado limite. Um problema de otimização que visa maximizar o intervalo admissível entre duas amostras consecutivas é apresentado. Os resultados das metodologias propostas são avaliados através de exemplos numéricos.

This work presents solutions to the synchronization problem of master-slave Lur’e systems via a control law. Initially, the discrete-time systems case is formulated under a saturating control. Then, in the continuous-time systems case, a sampled-data control is considered. Synchronization is addressed as a problem of stabilization of the error between the states of the master and slave systems and the control is designed via an optimization problem. In the discrete-time systems case, from a quadratic Lyapunov function and sector conditions, linear matrix inequalities (LMI) are derived with the objective of ensuring that the difference between the master and slave states converges asymptotically to zero under the saturation of the control signal. Stability conditions based on a dead zone function modeling are also obtained, in the particular case where the Lur’e nonlinearity is described by a piecewise-linear function. An optimization problem for the controller design is proposed in order to maximize a set of admissible initial errors for which the synchronization is guaranteed. In the sampled-data control approach, a Lur’e-type Lyapunov function and a loopedfunctional are considered to derive LMI conditions that guarantee the synchronization of master-slave systems whenever the interval between two samples respects some bounds. An optimization problem…

Advisors/Committee Members: Flores, Jeferson Vieira, Silva Junior, Joao Manoel Gomes da.

Subjects/Keywords: Sistemas não lineares; Sistemas de controle; Synchronization; LMI; Looped-functional; Lur’e systems; Aperiodic sampling; Sampled-data control; Actuator saturation

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APA (6^th Edition):

Zani, A. (2018). Sincronização de sistemas lur’e com controle amostrado. (Masters Thesis). Brazil. Retrieved from http://hdl.handle.net/10183/187969

Chicago Manual of Style (16^th Edition):

Zani, Antonio. “Sincronização de sistemas lur’e com controle amostrado.” 2018. Masters Thesis, Brazil. Accessed April 11, 2021. http://hdl.handle.net/10183/187969.

MLA Handbook (7^th Edition):

Zani, Antonio. “Sincronização de sistemas lur’e com controle amostrado.” 2018. Web. 11 Apr 2021.

Vancouver:

Zani A. Sincronização de sistemas lur’e com controle amostrado. [Internet] [Masters thesis]. Brazil; 2018. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10183/187969.

Council of Science Editors:

Zani A. Sincronização de sistemas lur’e com controle amostrado. [Masters Thesis]. Brazil; 2018. Available from: http://hdl.handle.net/10183/187969

University of Illinois – Urbana-Champaign

10. Jafarnejadsani, Hamidreza. Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security.

Degree: PhD, Mechanical Engineering, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/102798

► This dissertation extends the L1 adaptive control theory to sampled-data (SD) framework. Multi-input multi-output non-square (underactuated) systems are considered with different sampling rates for inputs… (more)

▼ This dissertation extends the L1 adaptive control theory to sampled-data (SD) framework. Multi-input multi-output non-square (underactuated) systems are considered with different sampling rates for inputs and outputs. The sampled-data framework allows to address non-minimum phase systems, subject to less restrictive assumptions as compared to continuous time framework. It is shown that the closed-loop system can recover the response of a continuous-time reference system as the sampling time of the SD controller tends to zero. In this thesis, the L1 sampled data adaptive controller is integrated with the Simplex fault-tolerant architecture for resilient control of cyber-physical systems (CPSs). Detection and mitigation of zero-dynamics attacks are addressed and validated in flight tests of a quadrotor in Intelligent Robotics Laboratory of UIUC. The experiments show that the multirate L1 controller can e effectively detect stealthy zero-dynamics attacks and recover the stability of the perturbed system, where the single-rate conventional L1 adaptive controller fails. From the perspective of applications, the dissertation considers navigation and control of autonomous vehicles and proposes a two-loop framework, in which the high-level reference commands are limited by a saturation function, while the low-level controller tracks the reference by compensating for disturbances and uncertainties. A class of nested, uncertain, multi-input multi-output (MIMO) systems subject to reference command saturation, possibly with non-minimum phase zeros, is considered. Robust stability and performance of the overall closed-loop system with command saturation and multirate L1 adaptive controller are analyzed. Finally, a systematic analysis and synthesis method is proposed for the optimal design of filters in the L1 adaptive output-feedback structure, where the lowpass filter is the key to the trade-off between the performance and robustness of the closed-loop system. An optimization problem is formulated using the constraint on the input time-delay margin and a cost-function based on mixed L1/H2-norm performance measure. The optimization problem can be efficiently solved using linear/quadratic programming. We note that the framework of this dissertation and the multi-loop problem formulation of navigation and control of autonomous systems provide suitable synthesis and analysis tools for autonomous cyber-physical systems (CPSs), including self-driving cars, unmanned aerial vehicles (UAVs), and industrial/medical robots, to name just a few. The SD design facilitates the implementation of control laws on digital computers in CPSs, where the input/output signals are available at discrete time instances with different sampling rates. Advisors/Committee Members: Hovakimyan, Naira (advisor), Hovakimyan, Naira (Committee Chair), Sha, Lui (committee member), Voulgaris, Petros (committee member), Salapaka, Srinivasa (committee member).

Subjects/Keywords: cyber-physical security; sampled-data systems; multi-level multirate control; L1 adaptive output-feedback control; uncertain multi-input multi-output systems; non-minimum phase systems; zero-dynamics attack; filter optimization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jafarnejadsani, H. (2018). Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/102798

Chicago Manual of Style (16^th Edition):

Jafarnejadsani, Hamidreza. “Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 11, 2021. http://hdl.handle.net/2142/102798.

MLA Handbook (7^th Edition):

Jafarnejadsani, Hamidreza. “Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security.” 2018. Web. 11 Apr 2021.

Vancouver:

Jafarnejadsani H. Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/2142/102798.

Council of Science Editors:

Jafarnejadsani H. Robust adaptive sampled-data control design for MIMO systems: Applications in cyber-physical security. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/102798

11. Isfoula, Fayrouz. Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems.

Degree: Docteur es, Automatique, 2019, Poitiers

URL: http://www.theses.fr/2019POIT2303

►

Un système multi-agents est composé d’un ensemble d’agents interagissant entre eux et avec leur environnement, un agent étant vu comme un système dynamique autonome. La… (more)

▼

Un système multi-agents est composé d’un ensemble d’agents interagissant entre eux et avec leur environnement, un agent étant vu comme un système dynamique autonome. La force des SMA repose sur la capacité des agents à coopérer entre eux pour atteindre un objectif qu’un agent seul ne pourrait atteindre. Chaque agent partage ses informations avec ses voisins, ce qui permet à l’ensemble des agents de s’accorder sur un objectif commun sans qu’il y ait pour autant une centralisation de l’information et de l’objectif. En ce sens, un système multi-agents peut être vu comme un réseau dans lequel l’information est distribuée. L’intérêt croissant pour le contrôle distribué et la coordination des réseaux constitués d’agents autonomes est motivé par l’absence de centralisation de l’information et la possibilité d’avoir une topologie du réseau variable. Les algorithmes de contrôle déployés sur ces réseaux sont de nature distribuée puisqu’ils s’appuient sur des informations locales, et sont robustes vis-à-vis des variations de topologie et de taille du réseau. Le problème le plus étudié dans le cadre de ces systèmes multi-agents est celui du consensus, qui peut être résumé ainsi : étant donné des conditions initiales pour chaque agent, quelles sont les conditions pour que les agents s’accordent asymptotiquement sur une valeur commune en n’échangeant que des informations entre agents voisins. Cette thèse traite du développement de commandes permettant d’atteindre ce consensus pour des topologies fixes et variables, en présence ou non d’un leader (suivi de consensus), et sur la qualité des informations transitant dans le réseau. En suivi de consensus, la notion de leader perceptif est développée et une commande est proposée pour une topologie fixe et variable.

An agent is an autonomous dynamics system that can coordinate with the environment as well as with other agents. A group of these autonomous agents working in coordination is called a Multi-agent system (MAS). A MAS has several advantages over single agent operation. The main objective of MAS is to achieve a complex goal which is hard to achieve by a single agent. In MAS, each agent shares its information (states) to the neighbors only to complete the task hence no centralized monitoring systems is required. We can define a multi-agent system as a network in which information is distributed. The interest of researchers in the study of distributed control and distributed coordination of autonomous agent networks is motivated by the fact that it has the ability to cope with the problems associated with centralized communication network and also allow the switching network topologies.The algorithms for distributed networks only use local information, and are robust to variations of network topology and can accommodate network with large size.One of the most studied problems in the field of MAS is the consensus, which can be defined as: for any initial conditions for all agent, what are the conditions that should hold in order that the agents agree on a common value…

Advisors/Committee Members: Coirault, Patrick (thesis director), Moulay, Emmanuel (thesis director), Bernuau, Emmanuel (thesis director).

Subjects/Keywords: Système multi-Agents; Suivi par consensus; Leader perceptif; Commande échantillonnée; Multi-Agent systems; Consensus tracking; Perceptive leader; Sampled data control; 629.832; 629.836; 629.892

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Isfoula, F. (2019). Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems. (Doctoral Dissertation). Poitiers. Retrieved from http://www.theses.fr/2019POIT2303

Chicago Manual of Style (16^th Edition):

Isfoula, Fayrouz. “Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems.” 2019. Doctoral Dissertation, Poitiers. Accessed April 11, 2021. http://www.theses.fr/2019POIT2303.

MLA Handbook (7^th Edition):

Isfoula, Fayrouz. “Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems.” 2019. Web. 11 Apr 2021.

Vancouver:

Isfoula F. Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems. [Internet] [Doctoral dissertation]. Poitiers; 2019. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2019POIT2303.

Council of Science Editors:

Isfoula F. Une approche du suivi de consensus pour les systèmes multi-agents : An appraoch of practical consensus tracking of multi agent systems. [Doctoral Dissertation]. Poitiers; 2019. Available from: http://www.theses.fr/2019POIT2303

12. Theodosis - Palimeris, Dionysios. Προβλήματα σχεδίασης για μη γραμμικά συστήματα.

Degree: 2017, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/40384

►

Ιn this Dissertation the following problems are addressed: (i) the Observer Design Problem for nonlinear time-varying systems; and (ii) the Problem of Stabilizing an autonomous… (more)

▼

Ιn this Dissertation the following problems are addressed: (i) the Observer Design Problem for nonlinear time-varying systems; and (ii) the Problem of Stabilizing an autonomous nonlinear system by means of sampled-data feedback. Firstly, sufficient conditions are established for the solvability of the Observer Design Problem for a wide class of triangular nonlinear control systems. The state estimation is exhibited by means of a Luenberger-type observer whose dynamics are in general time-varying and noncausal. The proof of the main results is based on a Lyapunov-like forwarding procedure which extends relative methodologies employed in the literature for the solvability of the same problem. Then, it is proved that, under weaker hypotheses, the observer design problem for triangular systems is solvable by means of a switching sequence of delayed observers. In the second part of this dissertation, a Lyapunov characterization is established for the possibility of semi-global asymptotic stabilization of general nonlinear autonomous systems by means of a time-varying sampled-data feedback. This result is then exploited in order to derive a Lie algebraic sufficient condition for sampled-data feedback semi-global stabilization of affine in the control nonlinear systems with non-zero drift term. The corresponding result constitutes an extension of the well-known Artstein-Sontag Theorem on stabilization by means of an almost smooth feedback.

Στην παρούσα διατριβή μελετώνται τα εξής δύο προβλήματα: (i) Το Πρόβλημα Σχεδίασης Παρατηρητών για μη γραμμικά χρονικώς μεταβαλλόμενα συστήματα, και (ii) το Πρόβλημα Σταθεροποίησης αυτόνομων μη γραμμικών συστημάτων μέσω ανάδρασης με δειγματοληψία.Αρχικά, εδραιώνονται ικανές συνθήκες για την επιλυσιμότητα του Προβλήματος Σχεδίασης Παρατηρητή για μια μεγάλη κλάση μη γραμμικών τριγωνικών συστημάτων ελέγχου. Η κατάσταση του συστήματος εκτιμάται μέσω ενός Luenberger τύπου παρατηρητή του οποίου τα δυναμικά είναι εν γένει χρονικώς μεταβαλλόμενα και μη αιτιατά. Η απόδειξη των αντίστοιχων αποτελεσμάτων στηρίζεται σε μια Lyapunov τύπου επαγωγική διαδικασία που επεκτείνει παρόμοιες μεθοδολογίες από τη διεθνή βιβλιογραφία για την επιλυσιμότητα του ίδιου προβλήματος. Στη συνέχεια, αποδεικνύεται ότι, υπό ασθενέστερες συνθήκες, το Πρόβλημα Σχεδίασης Παρατηρητή για τριγωνικά συστήματα είναι επιλύσιμο μέσω μιας διακοπτόμενης ακολουθίας παρατηρητών με χρονική υστέρηση. Στο δεύτερο μέρος της διατριβής, εδραιώνονται Lyapunov χαρακτηρισμοί για τη δυνατότητα ημι-ολικής σταθεροποίησης μη γραμμικών αυτόνομων συστημάτων μέσω χρονικά μεταβαλλόμενης ανάδρασης με δειγματοληψία. Στη συνέχεια, αυτός ο χαρακτηρισμός χρησιμοποιείται προκειμένου να εξαχθούν ικανές Lie αλγεβρικές συνθήκες για τη δυνατότητα σταθεροποίησης μη γραμμικών συστημάτων, γραμμικών ως προς τον έλεγχο, μέσω ανάδρασης με δειγματοληψία. Το αντίστοιχο αποτέλεσμα αποτελεί επέκταση του γνωστού Θεωρήματος Artstein-Sontag για σταθεροποίηση μέσω σχεδόν λείας ανάδρασης.

Subjects/Keywords: Παρατηρητές; Μη γραμμικά συστήματα; Σταθεροποίηση; Ανάδραση με δειγματοληψία; Τριγωνικά συστήματα ελέγχου; Διακοπτόμενα δυναμικά; Observers; Nonlinear systems; Stabilization; Sampled-data feedback; Triangular control systems; Switching dynamics

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Theodosis - Palimeris, D. (2017). Προβλήματα σχεδίασης για μη γραμμικά συστήματα. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/40384

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Theodosis - Palimeris, Dionysios. “Προβλήματα σχεδίασης για μη γραμμικά συστήματα.” 2017. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed April 11, 2021. http://hdl.handle.net/10442/hedi/40384.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Theodosis - Palimeris, Dionysios. “Προβλήματα σχεδίασης για μη γραμμικά συστήματα.” 2017. Web. 11 Apr 2021.

Vancouver:

Theodosis - Palimeris D. Προβλήματα σχεδίασης για μη γραμμικά συστήματα. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2017. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10442/hedi/40384.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Theodosis - Palimeris D. Προβλήματα σχεδίασης για μη γραμμικά συστήματα. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2017. Available from: http://hdl.handle.net/10442/hedi/40384

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université Paris-Sud – Paris XI

13. Tanasa, Valentin. Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées.

Degree: Docteur es, Physique, 2012, Université Paris-Sud – Paris XI

URL: http://www.theses.fr/2012PA112300

►

Cette thèse concerne la conception de commandes échantillonnées pour les systèmes non-linéaires en temps continu. Les systèmes échantillonnés sont des éléments inhérents aux systèmes contrôlés… (more)

▼

Cette thèse concerne la conception de commandes échantillonnées pour les systèmes non-linéaires en temps continu. Les systèmes échantillonnés sont des éléments inhérents aux systèmes contrôlés par ordinateur, les systèmes hybrides ou les systèmes embarqués. La conception et le calcul des contrôleurs numériques appropriés sont des taches difficiles car ils contiennent des composants à la fois continu et en temps discret. Ce travail s'inscrit dans une activité de recherche menée par S. Monaco et D. Normand-Cyrot dans le domaine des systèmes échantillonnés non-linéaires. L'idée de base est de concevoir des contrôleurs digitaux qui permettent de récupérer certaines propriétés en temps continu qui sont généralement dégradées par l'échantillonnage. Tel est le cas de l'émulation lorsque les contrôleurs en temps continu sont mis en ouvre en utilisant des bloqueurs d'ordre zéro. Cette thèse apporte des contributions dans trois directions complémentaires. La première concerne les développements théoriques: une nouvelle conception de type ``backstepping digital" est proposée pour les systèmes en forme ``strict-feedback". Cette méthode est comparée à d'autres stratégies proposées dans la littérature. La deuxième contribution est le développement d'un logiciel pour la synthèse des contrôleurs et d'une ``boîte à outils" pour simuler (en Matlab) les systèmes échantillonnés non-linéaires et leurs contrôleurs. Cette boîte à outils inclut plusieurs algorithmes pour la synthèse de contrôleurs échantillonnés tels que: commande de type multi-échelle, reproduction entrée-sortie/Lyapunov, backstepping digital, etc. La troisième contribution concerne plusieurs études de cas menées pour mettre en évidence les performances des contrôleurs échantillonnés, calculés avec l'aide du logiciel. Des résultats expérimentaux et des simulations sont décrits pour divers exemples réels dans les domaines électriques et mécaniques.

This thesis is concerned with the sampled-data control of non-linear continuous-time systems. Sampled-data systems are present in all computer controlled, hybrid or embedded systems. The design and computation of suitable digital controllers represent unavoidable tasks since both continuous and discrete-time components interact. The basic framework of this work takes part of a wide research activity performed by S. Monaco and D. Normand-Cyrot regarding non-linear sampled-data systems. The underlying idea is to design digital controllers that recover certain continuous-time properties that are usually degraded through sampling as it is the case when continuous-time controllers are implemented by means of zero-order holder devices (emulated control). This thesis brings contributions into three different directions. The first one regards theoretical developments: a new digital backstepping-like strategy design for strict-feedback systems is proposed. This method is compared with other strategies proposed in the literature. The second contribution is the development of a control designer and of a simulation toolbox (in Matlab) for…

Advisors/Committee Members: Normand-Cyrot, Dorothée (thesis director), Popescu, Dumitru (thesis director).

Subjects/Keywords: Système échantillonné; Système non linéaire; Commande numérique; Commande de type backstepping; Commande avec multi échelles de temps; Commande de processus; Sampled-data control; Nonlinear systems; Digital control; Multi-rate control; Backstepping control; Process control

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tanasa, V. (2012). Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées. (Doctoral Dissertation). Université Paris-Sud – Paris XI. Retrieved from http://www.theses.fr/2012PA112300

Chicago Manual of Style (16^th Edition):

Tanasa, Valentin. “Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées.” 2012. Doctoral Dissertation, Université Paris-Sud – Paris XI. Accessed April 11, 2021. http://www.theses.fr/2012PA112300.

MLA Handbook (7^th Edition):

Tanasa, Valentin. “Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées.” 2012. Web. 11 Apr 2021.

Vancouver:

Tanasa V. Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées. [Internet] [Doctoral dissertation]. Université Paris-Sud – Paris XI; 2012. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2012PA112300.

Council of Science Editors:

Tanasa V. Development of theoretical and computational tools for the design of control strategies for nonlinear sampled-data systems : Développement d'outils de calcul et de logiciels pour la réalisation et l'implantation de stratégies de commande non linéaires échantillonnées. [Doctoral Dissertation]. Université Paris-Sud – Paris XI; 2012. Available from: http://www.theses.fr/2012PA112300

14. KHALID SEYED SAEED AHSAN ABIDI. Advanced discrete-time controller design with application to motion control.

Degree: 2009, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/15906

Subjects/Keywords: Adaptive Control; Discrete-Time Control; Iterative Learning Control; Sampled-Data Systems; Sliding Mode Control; Tracking Control

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APA (6^th Edition):

ABIDI, K. S. S. A. (2009). Advanced discrete-time controller design with application to motion control. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15906

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

ABIDI, KHALID SEYED SAEED AHSAN. “Advanced discrete-time controller design with application to motion control.” 2009. Thesis, National University of Singapore. Accessed April 11, 2021. http://scholarbank.nus.edu.sg/handle/10635/15906.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

ABIDI, KHALID SEYED SAEED AHSAN. “Advanced discrete-time controller design with application to motion control.” 2009. Web. 11 Apr 2021.

Vancouver:

ABIDI KSSA. Advanced discrete-time controller design with application to motion control. [Internet] [Thesis]. National University of Singapore; 2009. [cited 2021 Apr 11]. Available from: http://scholarbank.nus.edu.sg/handle/10635/15906.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

ABIDI KSSA. Advanced discrete-time controller design with application to motion control. [Thesis]. National University of Singapore; 2009. Available from: http://scholarbank.nus.edu.sg/handle/10635/15906

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University

15. Al Ramadan, Hussain. Stochastic Sampled-data Model Predictive Control for Nonlinear Systems .

Degree: Chemical Engineering, Queens University

URL: http://hdl.handle.net/1974/24244

► Stochastic Model Predictive Control (SMPC) has been the focus of intense research in the last years. The objective of SMPC is to design control systems… (more)

▼ Stochastic Model Predictive Control (SMPC) has been the focus of intense research in the last years. The objective of SMPC is to design control systems corrupted by stochastic noise. Existing solutions include the implementation of Robust MPC schemes, where the worst case scenario is taken into account. As this approach often results in conservative and expensive solutions, a number of researchers have addressed the need for more optimistic and realistic tailored control schemes that can handle stochastic process behaviour. SMPC gives practitioners a tool to take most realization of uncertainty in the controller design, while guaranteeing feasibility and stability. The work presented in this thesis focuses on developing an SMPC algorithm for nonlinear systems with additive stochastic uncertainty. The scheme is carried out in a fast sampled-data approach, which yields an advantageous computational load. We develop a sampled-data scheme for deterministic systems through sampling control moves. Two sampled-data schemes have been proposed and examined in benchmark simulations including a CSTR system. The first scheme considers a hybrid control system, where a continuous-time flow control occurs during a fine time grid, and a discrete-time jump control looks after jumps in a coarse time grid. The second scheme is a complete sampled-data system through discrete control moves throughout the two time grids. It was shown that the second control scheme succeeded in reducing the cost function along with a huge reduction in CPU time for all the simulations. Secondly, the latter sampled-data scheme was modified to handle stochastic noise through the inclusion of an expected cost and probabilistic constraints. The resulting control can handle moderate noise signals and produce much better results than conventional nonlinear SMPC schemes. The proposed stochastic sampled-data MPC scheme is designed to tackle nonlinear dynamical systems with moderate noise signals with a large precision and low CPU time.

Subjects/Keywords: Stochastic ; Sampled-Data ; MPC ; Model ; Predictive ; Control ; Model Predictive Control ; SMPC ; NMPC ; Nonlinear Systems ; Constraint Tightening

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Al Ramadan, H. (n.d.). Stochastic Sampled-data Model Predictive Control for Nonlinear Systems . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/24244

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Al Ramadan, Hussain. “Stochastic Sampled-data Model Predictive Control for Nonlinear Systems .” Thesis, Queens University. Accessed April 11, 2021. http://hdl.handle.net/1974/24244.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Al Ramadan, Hussain. “Stochastic Sampled-data Model Predictive Control for Nonlinear Systems .” Web. 11 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Al Ramadan H. Stochastic Sampled-data Model Predictive Control for Nonlinear Systems . [Internet] [Thesis]. Queens University; [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1974/24244.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Al Ramadan H. Stochastic Sampled-data Model Predictive Control for Nonlinear Systems . [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/24244

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

16. YAN WEILI. IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS.

Degree: 2016, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/130535

Subjects/Keywords: Adaptive Control; Beyond Nyquist Frequency; Multirate Control; Periodic Disturbance Rejection; Sampled-Data Systems; System Identification

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

WEILI, Y. (2016). IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/130535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

WEILI, YAN. “IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS.” 2016. Thesis, National University of Singapore. Accessed April 11, 2021. http://scholarbank.nus.edu.sg/handle/10635/130535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

WEILI, YAN. “IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS.” 2016. Web. 11 Apr 2021.

Vancouver:

WEILI Y. IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS. [Internet] [Thesis]. National University of Singapore; 2016. [cited 2021 Apr 11]. Available from: http://scholarbank.nus.edu.sg/handle/10635/130535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

WEILI Y. IDENTIFICATION AND CONTROL OF CRITICAL MECHANICAL RESONANT MODES BEYOND THE NYQUIST FREQUENCY IN HIGH-PERFORMANCE MECHATRONICS SYSTEMS. [Thesis]. National University of Singapore; 2016. Available from: http://scholarbank.nus.edu.sg/handle/10635/130535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Southern California

17. Kalender, Serkan. Robust control of periodically time-varying systems.

Degree: PhD, Mechanical Engineering, 2007, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/554308/rec/5619

► In this dissertation, a practical control design method for linear periodically time varying systems is presented. The method is based on parametrization of control, and… (more)

Subjects/Keywords: robust control; time-periodic systems; control vector parametrization; point-mapping; sampled-data Systems; parametric uncertainties; structured singular value theory

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APA (6^th Edition):

Kalender, S. (2007). Robust control of periodically time-varying systems. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/554308/rec/5619

Chicago Manual of Style (16^th Edition):

Kalender, Serkan. “Robust control of periodically time-varying systems.” 2007. Doctoral Dissertation, University of Southern California. Accessed April 11, 2021. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/554308/rec/5619.

MLA Handbook (7^th Edition):

Kalender, Serkan. “Robust control of periodically time-varying systems.” 2007. Web. 11 Apr 2021.

Vancouver:

Kalender S. Robust control of periodically time-varying systems. [Internet] [Doctoral dissertation]. University of Southern California; 2007. [cited 2021 Apr 11]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/554308/rec/5619.

Council of Science Editors:

Kalender S. Robust control of periodically time-varying systems. [Doctoral Dissertation]. University of Southern California; 2007. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/554308/rec/5619

Utah State University

18. Cao, Yongcan. Decentralized Coordination of Multiple Autonomous Vehicles.

Degree: PhD, Electrical and Computer Engineering, 2010, Utah State University

URL: https://digitalcommons.usu.edu/etd/652

► This dissertation focuses on the study of decentralized coordination algorithms of multiple autonomous vehicles. Here, the term decentralized coordination is used to refer to… (more)

▼ This dissertation focuses on the study of decentralized coordination algorithms of multiple autonomous vehicles. Here, the term decentralized coordination is used to refer to the behavior that a group of vehicles reaches the desired group behavior via local interaction. Research is conducted towards designing and analyzing distributed coordination algorithms to achieve desired group behavior in the presence of none, one, and multiple group reference states. Decentralized coordination in the absence of any group reference state is a very active research topic in the systems and controls society. We first focus on studying decentralized coordination problems for both single-integrator kinematics and double-integrator dynamics in a sampled-data setting because real systems are more appropriate to be modeled in a sampled-data setting rather than a continuous setting. Two sampled-data consensus algorithms are proposed and the conditions to guarantee consensus are presented for both fixed and switching network topologies. Because a number of coordination algorithms can be employed to guarantee coordination, it is important to study the optimal coordination problems. We further study the optimal consensus problems in both continuous-time and discrete-time settings via an linear-quadratic regulator (LQR)-based approach. Noting that fractional-order dynamics can better represent the dynamics of certain systems, especially when the systems evolve under complicated environment, the existing integer-order coordination algorithms are extended to the fractional-order case. Decentralized coordination in the presence of one group reference state is also called coordinated tracking, including both consensus tracking and swarm tracking. Consensus tracking refers to the behavior that the followers track the group reference state. Swarm tracking refers to the behavior that the followers move cohesively with the external leader while avoiding inter-vehicle collisions. In this part, consensus tracking is studied in both discrete-time setting and continuous-time settings while swarm tracking is studied in a continuous-time setting. Decentralized coordination in the presence of multiple group reference states is also called containment control, where the followers will converge to the convex hull, i.e., the minimal geometric space, formed by the group references states via local interaction. In this part, the containment control problem is studied for both single-integrator kinematics and double-integrator dynamics. In addition, experimental results are provided to validate some theoretical results. Advisors/Committee Members: Wei Ren, YangQuan Chen, Todd Moon, ;.

Subjects/Keywords: Cooperative control; Distributed control; Fractional calculus; Optimization; Sampled-data; Electrical and Electronics; Engineering; Robotics

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APA (6^th Edition):

Cao, Y. (2010). Decentralized Coordination of Multiple Autonomous Vehicles. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/652

Chicago Manual of Style (16^th Edition):

Cao, Yongcan. “Decentralized Coordination of Multiple Autonomous Vehicles.” 2010. Doctoral Dissertation, Utah State University. Accessed April 11, 2021. https://digitalcommons.usu.edu/etd/652.

MLA Handbook (7^th Edition):

Cao, Yongcan. “Decentralized Coordination of Multiple Autonomous Vehicles.” 2010. Web. 11 Apr 2021.

Vancouver:

Cao Y. Decentralized Coordination of Multiple Autonomous Vehicles. [Internet] [Doctoral dissertation]. Utah State University; 2010. [cited 2021 Apr 11]. Available from: https://digitalcommons.usu.edu/etd/652.

Council of Science Editors:

Cao Y. Decentralized Coordination of Multiple Autonomous Vehicles. [Doctoral Dissertation]. Utah State University; 2010. Available from: https://digitalcommons.usu.edu/etd/652

19. Ricciardi Celsi, Lorenzo. Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems.

Degree: Docteur es, Automatique, 2018, Université Paris-Saclay (ComUE); Università degli studi La Sapienza (Rome)

URL: http://www.theses.fr/2018SACLS017

► L'objectif de cette thèse de doctorat est (i) d'étudier et de développer des méthodes d’analyse et de commande de systèmes de contrôle en réseau linéaires… (more)

▼ L'objectif de cette thèse de doctorat est (i) d'étudier et de développer des méthodes d’analyse et de commande de systèmes de contrôle en réseau linéaires et non linéaires et (ii) de montrer le potentiel de ces approches dans des applications complexes pertinentes. À cet égard, la théorie des systèmes à plusieurs agents, la théorie des graphes algébriques et le consensus sont des outils méthodologiques les plus intéressants. Une attention particulière est accordée à la caractérisation des relations entre, d'une part, la topologie du graphe de communication qui sous-tend l'évolution du système à plusieurs agents considéré et, d'autre part, les propriétés spectrales de la matrice Laplacienne associée au graphe lui-même. Le contrôle d'un groupe d'agents autonomes est étudié sous différents angles. Le principal objectif de contrôle est de s’assurer que les agents travaillent ensemble de manière coopérative, où la coopération représente la relation étroite entre tous les agents de l'équipe, le partage de l'information jouant un rôle important. En particulier, beaucoup de problèmes de consensus/accord/ synchronisation /rendez-vous sont étudiés afin de guider un groupe d’agents vers un état commun. Le consensus est étudié dans un contexte à temps discret parce que la dynamique du système est en général continue alors que les mesures et les entrées de contrôle sont des données échantillonnées. En outre, la théorie des jeux est utilisée pour faire face aux problèmes de coordination distribués à plusieurs agents, avec une application aux réseaux connus sous le nom de Software Defined Networks. À cet égard, on peut montrer que, sous des protocoles correctement conçus, les joueurs convergent vers un équilibre unique de Wardrop. On concentre l’attention sur le contrôle distribué, car cette approche présente des avantages évidents par rapport à la centralisation, comme l'évolutivité et la robustesse. Pourtant, le contrôle distribué a également ses propres inconvénients : avant tout, un inconvénient est que chaque agent ne peut pas prédire efficacement le comportement global du groupe en se basant uniquement sur des informations locales. Une certaine attention est également accordée à la nécessité de sécuriser les réseaux électriques contre le danger des attaques cyber-physiques grâce au développement de technologies d'intelligence distribuée. À cet égard, sur la base de topologies de réseaux d'énergie réalistes, nous présentons brièvement la conception d'un schéma de protection contre les attaques dynamiques à un point et à points multiples en boucle fermée. Nous formulons et résolvons un problème d'optimisation non convexe soumis à une contrainte de stabilité de Lyapunov pour la représentation à plusieurs agents autonome d'un réseau électrique obtenue après la linéarisation et l'application des lois d’attaque et de contrôle de fréquence. Finalement, nous présentons des résultats obtenus sur : le pilotage exact de la dynamique non linéaire finie à données échantillonnées avec des retards sur les entrées, au sujet de la… Advisors/Committee Members: Normand-Cyrot, Dorothée (thesis director), Monaco, Salvatore (thesis director).

Subjects/Keywords: Stabilisation; Systèmes non linéaires; Systèmes discrets et à données échantillonnées; Systèmes multi-agents; Réseaux complexes; Consensus; Stabilization; Nonlinear systems; Discrete-time and sampled-data control systems; Multi-agent systems; Complex networks; Consensus

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APA (6^th Edition):

Ricciardi Celsi, L. (2018). Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems. (Doctoral Dissertation). Université Paris-Saclay (ComUE); Università degli studi La Sapienza (Rome). Retrieved from http://www.theses.fr/2018SACLS017

Chicago Manual of Style (16^th Edition):

Ricciardi Celsi, Lorenzo. “Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE); Università degli studi La Sapienza (Rome). Accessed April 11, 2021. http://www.theses.fr/2018SACLS017.

MLA Handbook (7^th Edition):

Ricciardi Celsi, Lorenzo. “Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems.” 2018. Web. 11 Apr 2021.

Vancouver:

Ricciardi Celsi L. Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); Università degli studi La Sapienza (Rome); 2018. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2018SACLS017.

Council of Science Editors:

Ricciardi Celsi L. Commande non linéaire multi-agents : applications aux systèmes en réseau : Nonlinear Multi-Agent Control with Application to Networked Systems. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); Università degli studi La Sapienza (Rome); 2018. Available from: http://www.theses.fr/2018SACLS017

20. PANG CHEE KHIANG. Disturbance attenuation with multi-sensing servo systems for high density storage devices.

Degree: 2007, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/15764

Subjects/Keywords: Hard-disk drives; multi-sensing; probe-based storage systems; SSA (Self-Sensing Actuation); sampled-data systems; servo control

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APA (6^th Edition):

KHIANG, P. C. (2007). Disturbance attenuation with multi-sensing servo systems for high density storage devices. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15764

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

KHIANG, PANG CHEE. “Disturbance attenuation with multi-sensing servo systems for high density storage devices.” 2007. Thesis, National University of Singapore. Accessed April 11, 2021. http://scholarbank.nus.edu.sg/handle/10635/15764.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

KHIANG, PANG CHEE. “Disturbance attenuation with multi-sensing servo systems for high density storage devices.” 2007. Web. 11 Apr 2021.

Vancouver:

KHIANG PC. Disturbance attenuation with multi-sensing servo systems for high density storage devices. [Internet] [Thesis]. National University of Singapore; 2007. [cited 2021 Apr 11]. Available from: http://scholarbank.nus.edu.sg/handle/10635/15764.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

KHIANG PC. Disturbance attenuation with multi-sensing servo systems for high density storage devices. [Thesis]. National University of Singapore; 2007. Available from: http://scholarbank.nus.edu.sg/handle/10635/15764

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

21. Simard, Joel David. Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems.

Degree: 2018, University of Waterloo

URL: http://hdl.handle.net/10012/13921

► In adaptive control the goal is to deal with systems that have unknown and/or time-varying parameters. Most techniques are proven for the case in which… (more)

Subjects/Keywords: adaptive control; time-varying systems; nonlinear; linear parameter-varying; unstable zero dynamics; sampled-data

…approach will work. First of all, in this paper we will be constructing a sampled-data controller… …replaced by an estimate α̂; • a sampled-data parameter estimator of α(t) which produces… …Chapter 1 Introduction 1.1 Background The primary objective of adaptive control is to… …adaptive control methods were adopted in order to deal with systems for which parameters were… …methods such as supervisory and multi-model switching control (e.g. [8], [9…

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APA (6^th Edition):

Simard, J. D. (2018). Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13921

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Simard, Joel David. “Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems.” 2018. Thesis, University of Waterloo. Accessed April 11, 2021. http://hdl.handle.net/10012/13921.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Simard, Joel David. “Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems.” 2018. Web. 11 Apr 2021.

Vancouver:

Simard JD. Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10012/13921.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Simard JD. Periodic Nonlinear Adaptive Control of Rapidly Time-Varying Linear Systems. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13921

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Σωπασάκης, Παντελής. Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων.

Degree: 2012, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/38677

► The problem of drug administration is purely a control problem where the target is to keep the drug concentration at certain organs in the body… (more)

▼ The problem of drug administration is purely a control problem where the target is to keep the drug concentration at certain organs in the body close to the desired therapeutic set-points while the concentration in other organs and tissues does not exceed certain safety limits. The manipulated variable is the administered dosage and the controlled variable is the concentration of the drug in some tissue or organ of the body. However, unlike most engineering systems, the human body is a system which we have limited monitoring and intervention capabilities for. In order to design meaningful administration policies one needs to limit the frequency of (oral) administration and feedback sampling (i.e. how often the patient visits the medical centre to check on the progress of their therapy). All these restrictions call for novel control methods and motivated our work.Standard methods stemming from Digital Systems Theory, such as the Finite Impulse Response (FIR) filter are introduced in Pharmacokinetic Modelling and are used for the first time to formulate and to solve an optimal control problem for the oral administration of drugs. An FIR model derived from experimental pharmacokinetic data is employed to correlate the administered dose with the concentration-time profiles of the drug in the compartments (organs) of the body. The introduction of integer variables and the formulation of an Integer Programming mathematical optimisation problem yields solutions (administration sequences) which satisfy the administration frequency and dose availability constraints. The proposed method is extended to account for the stochastic variant of the optimal control problem sothat it can be used in practical applications where large populations of patients are to be treated. We use the proposed method to calculate the optimal administration course of L-dopa to a population of patients suffering from the Parkinson’s disease.Next, we investigate how Fractional Dynamical Systems help us fathom the interplay among the main factors of drug distribution. They allow us to draw individualised concentration-time profiles and implement feedback settings to control the concentration of the administered drug. Fractional Dynamics are used by many authors to describe processes with memory such as drug distribution when anomalous diffusion and deep tissue trapping phenomena are involved. A Fractional-PID controller is designed for the i.v. administration of Amiodarone – an anti-arrhythmic agent – and the dynamical characteristics of the closed-loop system are studied in the frequency domain.We identified an inefficiency that arises when designing controllers for constrained systems in the discrete-time domain. It happens that when such a controller is applied to the actual (continuous-time) system, the constraints are in for violation. Designing controllers that satisfy the constraints is of high importance when it comes to drug administration in order to avoid toxic side-effects. Using methods of polytopic over-approximation of matrix-exponential…

Subjects/Keywords: Βέλτιστη χορήγηση φαρμάκου; Κρουστικά δυναμικά συστήματα; Έλεγχος προβλεπτικού μοντέλου; Αναλλοίωτα σύνολα; Συστήματα με δειγματοληψία; Κλασματική δυναμική; Προβλεπτική τοξικολογία; Optimal drug administration; Impulsive systems; Invariance; Sampled-data systems; Model predictive control; Fractional dynamics; QSAR; Opentox

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APA (6^th Edition):

Σωπασάκης, . �. (2012). Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/38677

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Σωπασάκης, Παντελής. “Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων.” 2012. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed April 11, 2021. http://hdl.handle.net/10442/hedi/38677.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Σωπασάκης, Παντελής. “Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων.” 2012. Web. 11 Apr 2021.

Vancouver:

Σωπασάκης �. Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2012. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10442/hedi/38677.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Σωπασάκης �. Μοντελοποίηση και έλεγχος βιολογικών και φυσιολογικών συστημάτων. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2012. Available from: http://hdl.handle.net/10442/hedi/38677

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Herencia-Zapana, Heber. Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms.

Degree: PhD, Electrical/Computer Engineering, 2008, Old Dominion University

URL: 9780549936398 ; https://digitalcommons.odu.edu/ece_etds/74

► Computer control systems for safety critical systems are designed to be fault tolerant and reliable, however, soft errors triggered by harsh environments can affect… (more)

Subjects/Keywords: Error recovery; Safety critical systems; Sampled-data systems; Soft errors; Computer Engineering; Controls and Control Theory

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APA (6^th Edition):

Herencia-Zapana, H. (2008). Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms. (Doctoral Dissertation). Old Dominion University. Retrieved from 9780549936398 ; https://digitalcommons.odu.edu/ece_etds/74

Chicago Manual of Style (16^th Edition):

Herencia-Zapana, Heber. “Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms.” 2008. Doctoral Dissertation, Old Dominion University. Accessed April 11, 2021. 9780549936398 ; https://digitalcommons.odu.edu/ece_etds/74.

MLA Handbook (7^th Edition):

Herencia-Zapana, Heber. “Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms.” 2008. Web. 11 Apr 2021.

Vancouver:

Herencia-Zapana H. Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms. [Internet] [Doctoral dissertation]. Old Dominion University; 2008. [cited 2021 Apr 11]. Available from: 9780549936398 ; https://digitalcommons.odu.edu/ece_etds/74.

Council of Science Editors:

Herencia-Zapana H. Modeling and Stability Analysis of Nonlinear Sampled-Data Systems with Embedded Recovery Algorithms. [Doctoral Dissertation]. Old Dominion University; 2008. Available from: 9780549936398 ; https://digitalcommons.odu.edu/ece_etds/74

24. Mulay, Siddharth Pradeep. Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays.

Degree: MS, Aero/Astro Engineering, 2013, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1365971507

► The use of communication networks has increased over the years. Due to many advantages like modularity, system flexibility and ease of maintenance, these networks have… (more)

Subjects/Keywords: Aerospace Engineering; robust control; sampled data systems; time delay systems; robustness bounds; stability margins

…Page 2.1 Generic sampled data system with a network in the control loop . . . 2.2 Timing… …length of the network. Thus, a networked control model can be viewed as sampled-data (… …performance of the closed loop system. 2 Another issue of importance in control of sampled data… …2 MODELING OF SAMPLED DATA STATE SPACE SYSTEM WITH TIME DELAYS A typical control system… …diagnosis. 6 Figure 2.1: Generic sampled data system with a network in the control loop Figure…

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APA (6^th Edition):

Mulay, S. P. (2013). Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1365971507

Chicago Manual of Style (16^th Edition):

Mulay, Siddharth Pradeep. “Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays.” 2013. Masters Thesis, The Ohio State University. Accessed April 11, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1365971507.

MLA Handbook (7^th Edition):

Mulay, Siddharth Pradeep. “Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays.” 2013. Web. 11 Apr 2021.

Vancouver:

Mulay SP. Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays. [Internet] [Masters thesis]. The Ohio State University; 2013. [cited 2021 Apr 11]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1365971507.

Council of Science Editors:

Mulay SP. Robustness Bounds For Uncertain Sampled Data Systems With Presence of Time Delays. [Masters Thesis]. The Ohio State University; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1365971507

25. McCarthy, Philip James. Sampled-Data Control of Invariant Systems on Exponential Lie Groups.

Degree: 2019, University of Waterloo

URL: http://hdl.handle.net/10012/14968

► This thesis examines the dynamics and control of a class of systems furnished by kinematic systems on exponential matrix Lie groups, when the plant evolves… (more)

▼ This thesis examines the dynamics and control of a class of systems furnished by kinematic systems on exponential matrix Lie groups, when the plant evolves in continuous-time, but whose controller is implemented in discrete-time. This setup is called sampled-data and is ubiquitous in applied control. The class of Lie groups under consideration is motivated by our previous work concerning a similar class of kinematic systems on commutative Lie groups, whose local dynamics were found to be linear, which greatly facilitated control design. This raised the natural question of what class of systems on Lie groups, or class of Lie groups, would admit global characterizations of stability based on the linear part of their local dynamics. As we show in this thesis, the answer is – or at least includes – left- or right-invariant systems on exponential Lie groups, which are necessarily solvable, nilpotent, or commutative. We examine the stability of a class of difference equations that arises by sampling a right- or left-invariant flow on a matrix Lie group. The map defining such a difference equation has three key properties that facilitate our analysis: 1) its Lie series expansion enjoys a type of strong convergence; 2) the origin is an equilibrium; 3) the algebraic ideals enumerated in the lower central series of the Lie algebra are dynamically invariant. We show that certain global stability properties are implied by stability of the Jacobian linearization of dynamics at the origin, in particular, global asymptotic stability. If the Lie algebra is nilpotent, then the origin enjoys semiglobal exponential stability. We then study the synchronization of networks of identical continuous-time kinematic agents on a matrix Lie group, controlled by discrete-time controllers with constant sampling periods and directed, weighted communication graphs with a globally reachable node. We present a smooth, distributed, nonlinear discrete-time control law that achieves global synchronization on exponential matrix Lie groups, which include simply connected nilpotent Lie groups as a special case. Synchronization is generally asymptotic, but if the Lie group is nilpotent, then synchronization is achieved at an exponential rate. We first linearize the synchronization error dynamics at the identity, and show that the proposed controller achieves local exponential synchronization on any Lie group. Building on the local analysis, we show that, if the Lie group is exponential, then synchronization is global. We provide conditions for deadbeat convergence when the communication graph is unweighted and complete. Lastly, we examine a regulator problem for a class of fully actuated continuous-time kinematic systems on Lie groups, using a discrete-time controller with constant sampling period. We present a smooth discrete-time control law that achieves global regulation on simply connected nilpotent Lie groups. We first solve the problem when both the plant state and exosystem state are available for feedback. We then present a control…

Subjects/Keywords: control theory; Lie groups; Lie algebras; sampled-data; regulation; synchronization; stability; discrete-time; nonlinear control; geometric control

…convenient. 11 1.2 Sampled-Data Feedback Control of Systems on Matrix Lie Groups This thesis… …is concerned with the control of plants on Lie groups in the sampled-data setting, i.e., a… …knowledge, sampled-data control of systems on Lie groups has not been explored extensively in the… …data error feedback system on a Lie group. . . . . . . . . . . . . . 12 1.3 Sampled-data… …solvable Lie algebra of upper triangular matrices. 56 4.1 Sampled-data agent on a matrix Lie…

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APA (6^th Edition):

McCarthy, P. J. (2019). Sampled-Data Control of Invariant Systems on Exponential Lie Groups. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14968

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

McCarthy, Philip James. “Sampled-Data Control of Invariant Systems on Exponential Lie Groups.” 2019. Thesis, University of Waterloo. Accessed April 11, 2021. http://hdl.handle.net/10012/14968.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

McCarthy, Philip James. “Sampled-Data Control of Invariant Systems on Exponential Lie Groups.” 2019. Web. 11 Apr 2021.

Vancouver:

McCarthy PJ. Sampled-Data Control of Invariant Systems on Exponential Lie Groups. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10012/14968.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

McCarthy PJ. Sampled-Data Control of Invariant Systems on Exponential Lie Groups. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14968

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université Paris-Sud – Paris XI

26. Mattei, Giovanni. Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales.

Degree: Docteur es, Physique, 2015, Université Paris-Sud – Paris XI

URL: http://www.theses.fr/2015PA112025

►

La thèse porte sur le développement des techniques non linéaires robustes de stabilisation et commande des systèmes avec perturbations de model. D’abord, on introduit les… (more)

▼

La thèse porte sur le développement des techniques non linéaires robustes de stabilisation et commande des systèmes avec perturbations de model. D’abord, on introduit les concepts de base de stabilité et stabilisabilité robuste dans le contexte des systèmes non linéaires. Ensuite, on présente une méthodologie de stabilisation par retour d’état en présence d’incertitudes qui ne sont pas dans l’image de la commande («unmatched»). L’approche récursive du «backstepping» permet de compenser les perturbations «unmatched» et de construire une fonction de Lyapunov contrôlée robuste, utilisable pour le calcul ultérieur d’un compensateur des incertitudes dans l’image de la commande («matched»). Le contrôleur obtenu est appelé «recursive Lyapunov redesign». Ensuite, on introduit la technique de stabilisation par «Immersion & Invariance» comme outil pour rendre un donné contrôleur non linéaire, robuste par rapport à dynamiques non modelées. La première technique de contrôle non linéaire robuste proposée est appliquée au projet d’un autopilote pour un missile air-air et au développement d’une loi de commande d’attitude pour un satellite avec appendices flexibles. L’efficacité du «recursive Lyapunov redesign» est mis en évidence dans le deux cas d’étude considérés. En parallèle, on propose une méthode systématique de calcul des termes incertains basée sur un modèle déterministe d’incertitude. La partie finale du travail de thèse est relative à la stabilisation des systèmes sous échantillonnage. En particulier, on reformule, dans le contexte digital, la technique d’Immersion et Invariance. En premier lieu, on propose des solutions constructives en temps continu dans le cas d’une classe spéciale des systèmes en forme triangulaire «feedback form», au moyen de «backstepping» et d’arguments de domination non linéaire. L’implantation numérique est basée sur une loi multi-échelles, dont l’existence est garantie pour la classe des systèmes considérée. Le contrôleur digital assure la propriété d’attractivité et des trajectoires bornées. La loi de commande, calculée par approximation finie d’un développement asymptotique, est validée en simulation de deux exemples académiques et deux systèmes physiques, le pendule inversé sur un chariot et le satellite rigide.

The dissertation deals with the problems of stabilization and control of nonlinear systems with deterministic model uncertainties. First, in the context of uncertain systems analysis, we introduce and explain the basic concepts of robust stability and stabilizability. Then, we propose a method of stabilization via state-feedback in presence of unmatched uncertainties in the dynamics. The recursive backstepping approach allows to compensate the uncertain terms acting outside the control span and to construct a robust control Lyapunov function, which is exploited in the subsequent design of a compensator for the matched uncertainties. The obtained controller is called recursive Lyapunov redesign. Next, we introduce the stabilization technique through Immersion \& Invariance (I\&I) as…

Advisors/Committee Members: Normand-Cyrot, Dorothée (thesis director), Monaco, Salvatore (thesis director).

Subjects/Keywords: Commande non linéaire; Commande robuste; Fonction de Lyapunov contrôlée robuste; Modélisation de l'incertitude; Backstepping robuste; Commande non linéaire sous échantillonnage; Commande multi-échelles; Projet d'autopilote pour missile; Stabilisation d'attitude; Satellite flexible; Nonlinear control; Robust control; Robust control Lyapunov function; Uncertainty modeling; Robust Backstepping; Nonlinear sampled data control; Multi-rate control; Missile autopilot design; Attitude stabilization; Flexible spacecraft; Recursive Lyapunov redesign; Lypunov redesign; Immersion and invariance

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mattei, G. (2015). Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales. (Doctoral Dissertation). Université Paris-Sud – Paris XI. Retrieved from http://www.theses.fr/2015PA112025

Chicago Manual of Style (16^th Edition):

Mattei, Giovanni. “Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales.” 2015. Doctoral Dissertation, Université Paris-Sud – Paris XI. Accessed April 11, 2021. http://www.theses.fr/2015PA112025.

MLA Handbook (7^th Edition):

Mattei, Giovanni. “Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales.” 2015. Web. 11 Apr 2021.

Vancouver:

Mattei G. Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales. [Internet] [Doctoral dissertation]. Université Paris-Sud – Paris XI; 2015. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2015PA112025.

Council of Science Editors:

Mattei G. Robust nonlinear control : from continuous time to sampled-data with aerospace applications. : Commande non linéaire robuste : du temps-continu jusqu’aux systèmes sous échantillonnage avec applications aérospatiales. [Doctoral Dissertation]. Université Paris-Sud – Paris XI; 2015. Available from: http://www.theses.fr/2015PA112025

27. Tallapragada, Pavankumar. Utility Driven Sampled Data Control Under Imperfect Information.

Degree: Mechanical Engineering, 2013, University of Maryland

URL: http://hdl.handle.net/1903/14662

► Computer based control systems, which are ubiquitous today, are essentially sampled data control systems. In the traditional time-triggered control systems, the sampling period is conservatively… (more)

▼ Computer based control systems, which are ubiquitous today, are essentially sampled data control systems. In the traditional time-triggered control systems, the sampling period is conservatively chosen, based on a worst case analysis. However, in many control systems, such as those implemented on embedded computers or over a network, parsimonious sampling and computation is helpful. In this context, state/data based aperiodic utility driven sampled data control systems are a promising alternative. This dissertation is concerned with the design of utility driven event-triggers in certain classes of problems where the information available to the triggering mechanisms is imperfect. In the first part, the problem of utility driven event-triggering under partial state information is considered - specifically in the context of (i) decentralized sensing and (ii) dynamic output feedback control. In the case of full state feedback, albeit with decentralized sensing, methods are developed for designing local and asynchronous event-triggers for asymptotic stabilization of an equilibrium point of a general nonlinear system. In the special case of Linear Time Invariant (LTI) systems, the developed method also holds for dynamic output feedback control, which extends naturally to control over Sensor-Controller-Actuator Networks (SCAN), wherein even the controller is decentralized. The second direction that is pursued in this dissertation is that of parsimonious utility driven sampling not only in time but also in space. A methodology of co-designing an event-trigger and a quantizer of the sampled data controller is developed. Effectively, the proposed methodology provides a discrete-event controller for asymptotic stabilization of an equilibrium point of a general continuous-time nonlinear system. In the last part, a method is proposed for designing utility driven event-triggers for the problem of trajectory tracking in general nonlinear systems, where the source of imperfect information is the exogenous reference inputs. Then, specifically in the context of robotic manipulators we develop utility driven sampled data implementation of an adaptive controller for trajectory tracking, wherein imperfect knowledge of system parameters is an added complication. Advisors/Committee Members: Chopra, Nikhil (advisor).

Subjects/Keywords: Mechanical engineering; Electrical engineering; Robotics; Asynchronous Sensing and Control; Event Based Control; Event-Triggered Control; Hybrid Systems; Networked Control Systems; Sampled Data Control

…List of Figures 1.1 1.2 Time-triggered sampled data control… …Event-triggered sampled data control. . . . . . . . . . . . . . . . . . . 2.1 Batch reactor… …driven sampling mechanisms in sampled data control systems, specifically under some kind of… …utility driven sampled data control systems. 1.1 Motivation Computer based control systems… …which are ubiquitous today, are essentially sampled data control systems, wherein the control…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tallapragada, P. (2013). Utility Driven Sampled Data Control Under Imperfect Information. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/14662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tallapragada, Pavankumar. “Utility Driven Sampled Data Control Under Imperfect Information.” 2013. Thesis, University of Maryland. Accessed April 11, 2021. http://hdl.handle.net/1903/14662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tallapragada, Pavankumar. “Utility Driven Sampled Data Control Under Imperfect Information.” 2013. Web. 11 Apr 2021.

Vancouver:

Tallapragada P. Utility Driven Sampled Data Control Under Imperfect Information. [Internet] [Thesis]. University of Maryland; 2013. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1903/14662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tallapragada P. Utility Driven Sampled Data Control Under Imperfect Information. [Thesis]. University of Maryland; 2013. Available from: http://hdl.handle.net/1903/14662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Kirkpatrick, Kenton. Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics.

Degree: PhD, Aerospace Engineering, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/149493

► Reinforcement Learning has received a lot of attention over the years for systems ranging from static game playing to dynamic system control. Using Reinforcement Learning… (more)

▼ Reinforcement Learning has received a lot of attention over the years for systems ranging from static game playing to dynamic system control. Using Reinforcement Learning for control of dynamical systems provides the benefit of learning a control policy without needing a model of the dynamics. This opens the possibility of controlling systems for which the dynamics are unknown, but Reinforcement Learning methods like Q-learning do not explicitly account for time. In dynamical systems, time-dependent characteristics can have a significant effect on the control of the system, so it is necessary to account for system time dynamics while not having to rely on a predetermined model for the system. In this dissertation, algorithms are investigated for expanding the Q-learning algorithm to account for the learning of sampling rates and dynamics approximations. For determining a proper sampling rate, it is desired to find the largest sample time that still allows the learning agent to control the system to goal achievement. An algorithm called Sampled-Data Q-learning is introduced for determining both this sample time and the control policy associated with that sampling rate. Results show that the algorithm is capable of achieving a desired sampling rate that allows for system control while not sampling “as fast as possible”. Determining an approximation of an agent’s dynamics can be beneficial for the control of hierarchical multiagent systems by allowing a high-level supervisor to use the dynamics approximations for task allocation decisions. To this end, algorithms are investigated for learning first- and second-order dynamics approximations. These algorithms are respectively called First-Order Dynamics Learning and Second-Order Dynamics Learning. The dynamics learning algorithms are evaluated on several examples that show their capability to learn accurate approximations of state dynamics. All of these algorithms are then evaluated on hierarchical multiagent systems for determining task allocation. The results show that the algorithms successfully determine appropriated sample times and accurate dynamics approximations for the agents investigated. Advisors/Committee Members: Valasek, John (advisor), Bhattacharya, Raktim (committee member), Chakravorty, Suman (committee member), Ioerger, Thomas (committee member).

Subjects/Keywords: Reinforcement Learning; Q-learning; Control; Dynamics; Multiagent; Machine Learning; Artificial Intelligence; Sampling; Sampled-Data Systems; System Identification

…21 3.1 Sampled-Data Q-learning Diagram . . . . . . . . . . . . . . . . . . . 24 3.2… …Sampled-Data Q-learning (SDQL) . . . . . . . . . . . . . . . . . . . . 25 4.1 First… …Commanded State SDQL Sampled-Data Q-learning SMDP Semi-Markov Decision Process xix SODL… …when handling sampled-data systems, small changes in sample time can cause drastic changes to… …that needs to be investigated is the learning of the longest sample time for a sampled-data…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kirkpatrick, K. (2013). Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149493

Chicago Manual of Style (16^th Edition):

Kirkpatrick, Kenton. “Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics.” 2013. Doctoral Dissertation, Texas A&M University. Accessed April 11, 2021. http://hdl.handle.net/1969.1/149493.

MLA Handbook (7^th Edition):

Kirkpatrick, Kenton. “Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics.” 2013. Web. 11 Apr 2021.

Vancouver:

Kirkpatrick K. Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1969.1/149493.

Council of Science Editors:

Kirkpatrick K. Reinforcement Learning Control with Approximation of Time-Dependent Agent Dynamics. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149493

29. Wellman, Brandon. ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS.

Degree: 2017, University of Kentucky

URL: https://uknowledge.uky.edu/me_etds/99

► We present multi-agent control methods that address flocking in continuous-time and discrete-time settings. The method is decentralized, that is, each agents controller relies on local… (more)

Subjects/Keywords: flocking; multi-agent system; consensus algorithm; quadcopter; formation control; sampled-data control; motion-capture system; Acoustics, Dynamics, and Controls; Controls and Control Theory

…sampled data. The results in [77] demonstrate several examples, where a control… …designed for continuous-time dynamics and implemented in a sampled-data setting fails. In this… …x29;. . . . . . . . . . A plot of ν, which is in the destination-seeking control… …A plot of κ, which is in the damping control . . . . . . . . . . . . . . . . Four types of… …2 m/s2 and 9 m/s2 . . . . . . . . . . Speed and magnitude of control for the trajectory…

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APA (6^th Edition):

Wellman, B. (2017). ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/me_etds/99

Chicago Manual of Style (16^th Edition):

Wellman, Brandon. “ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS.” 2017. Doctoral Dissertation, University of Kentucky. Accessed April 11, 2021. https://uknowledge.uky.edu/me_etds/99.

MLA Handbook (7^th Edition):

Wellman, Brandon. “ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS.” 2017. Web. 11 Apr 2021.

Vancouver:

Wellman B. ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS. [Internet] [Doctoral dissertation]. University of Kentucky; 2017. [cited 2021 Apr 11]. Available from: https://uknowledge.uky.edu/me_etds/99.

Council of Science Editors:

Wellman B. ADVANCES IN MULTI-AGENT FLOCKING: CONTINUOUS-TIME AND DISCRETE-TIME ALGORITHMS. [Doctoral Dissertation]. University of Kentucky; 2017. Available from: https://uknowledge.uky.edu/me_etds/99

30. Dhar, Gaurav. Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data.

Degree: Docteur es, Mathematiques et applications, 2020, Limoges

URL: http://www.theses.fr/2020LIMO0050

► L’objectif de cette thèse est d’obtenir des conditions nécessaires d’optimalité du premier ordre sous la forme d’un principe du maximum de Pontryagin (en abrégé PMP)… (more)

▼ L’objectif de cette thèse est d’obtenir des conditions nécessaires d’optimalité du premier ordre sous la forme d’un principe du maximum de Pontryagin (en abrégé PMP) pour des problèmes de contrôle échantillonné optimal avec temps d’échantillonnage libres, contraintes d’état et coûts de Mayer non lisses. Le Chapitre 1 est consacré aux notations et espaces fonctionnels utiles pour décrire les problèmes de contrôle échantillonné optimal qui seront rencontrés dans le manuscrit. Dans le Chapitre 2, nous obtenons une condition nécessaire d’optimalité lorsque les temps d’échantillonnage peuvent être choisis librement qui est appelée condition de continuité de la fonction Hamiltonienne. Rappelons que la fonction Hamiltonienne qui décrit l’évolution du Hamiltonien avec les valeurs de la trajectoire optimale et du contrôle échantillonné optimal est, en général, discontinue quand les temps d’échantillonnage sont fixés. Notre résultat démontre que la continuité de la fonction Hamiltonienne est retrouvée pour les contrôles échantillonnés optimaux avec temps d’échantillonnage optimaux. Pour terminer, nous implémentons une méthode de tir basée sur la condition de continuité de la fonction Hamiltonienne pour déterminer numériquement les temps d’échantillonnage optimaux dans deux exemples linéaires-quadratiques. Dans le Chapitre 3, nous obtenons un PMP pour des problèmes de contrôle échantillonné optimal avec contraintes d’état. Nous obtenons que les vecteurs adjoints sont solutions de problèmes de Cauchy-Stieltjes définis par des mesures de Borel associées à des fonctions à variation bornée. De plus, nous trouvons que, sous quelques hypothèses assez générales, toute trajectoire admissible (associée à un contrôle échantillonné) rebondit nécessairement sur les contraintes d’état. Nous exploitons ce phénomène de trajectoires rebondissantes pour implémenter une méthode indirecte qu’on utilise pour résoudre numériquement quelques exemples simples de problèmes de contrôle échantillonné optimal avec contraintes d’état. Dans le Chapitre 4, nous obtenons un PMP pour des problèmes de contrôle échantillonné optimal avec coûts de Mayer non lisses. Notre preuve est uniquement basée sur les outils de l’analyse non lisse et n’utilise aucune technique de régularisation. Nous déterminons l’existence d’une sélection dans le sous-différentiel de la fonction de coût de Mayer non lisse en établissant un résultat plus général sur l’existence d’un vecteur séparant universel pour les ensembles convexes compacts. En appliquant ce résultat, appelé théorème de vecteur séparant universel, nous obtenons un PMP pour des problèmes de contrôle échantillonné optimal avec coûts de Mayer non lisses où la condition de transversalité sur le vecteur adjoint est donnée par une inclusion dans le sous-différentiel de la fonction de coût de Mayer non lisse. Pour obtenir les conditions d’optimalité sous la forme d’un PMP, nous utilisons différentes techniques de perturbation sur le contrôle optimal. Pour traiter les contraintes d’état, nous pénalisons la distance à ces… Advisors/Committee Members: Adly, Samir (thesis director), Bourdin, Loïc (thesis director).

Subjects/Keywords: Contrôle optimal; Contrôle échantillonné; Principe du maximum de Pontryagin; Principe variation-nel d’Ekeland; Temps d’échantillonnage optimaux; Continuité de la fonction Hamiltonienne; Contraintes d’état; Problèmes de Cauchy-Stieltjes; Analyse non lisse; Méthodes numériques indirectes; Méthodes de tir; Optimal control; Sampled-data control; Pontryagin maximum principle; Ekeland variational principle,; Optimal sampling times; Hamiltonian continuity; Running state constraints; Cauchy-Stieltjes problems; Nonsmooth analysis; Indirect numerical methods; Shooting methods; 519.6

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dhar, G. (2020). Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data. (Doctoral Dissertation). Limoges. Retrieved from http://www.theses.fr/2020LIMO0050

Chicago Manual of Style (16^th Edition):

Dhar, Gaurav. “Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data.” 2020. Doctoral Dissertation, Limoges. Accessed April 11, 2021. http://www.theses.fr/2020LIMO0050.

MLA Handbook (7^th Edition):

Dhar, Gaurav. “Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data.” 2020. Web. 11 Apr 2021.

Vancouver:

Dhar G. Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data. [Internet] [Doctoral dissertation]. Limoges; 2020. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2020LIMO0050.

Council of Science Editors:

Dhar G. Contributions en théorie du contrôle échantillonné optimal avec contraintes d’état et données non lisses : Contributions in optimal sampled-data control theory with state constraintsand nonsmooth data. [Doctoral Dissertation]. Limoges; 2020. Available from: http://www.theses.fr/2020LIMO0050

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