subject:(distributed control)

University of Minnesota

1. Tang, Wentao. Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence.

Degree: PhD, Chemical Engineering, 2020, University of Minnesota

► Chemical processes are intrinsically nonlinear and often integrated into large-scale networks, which are difficult to control effectively. The traditional challenges faced by process control, as… (more)

▼ Chemical processes are intrinsically nonlinear and often integrated into large-scale networks, which are difficult to control effectively. The traditional challenges faced by process control, as well as the modern vision of transitioning industries into a smart manufacturing paradigm, requires the instillation of new perspectives and application of new methods to the control of chemical processes. The goal is to realize highly automated, efficient, well-performing and flexible control strategies for nonlinear, interconnected and uncertain systems. Motivated by this, in this thesis, the following three important aspects (objectives) for contemporary process control – structuredness, optimality, and intelligence – are discussed in the corresponding three parts. 1. For the control of process networks in a structured and distributed manner, a network-theoretic perspective is introduced, which suggests to find a decomposition of the problem according to the block structures in the network. Such a perspective is examined by sparse optimal control of Laplacian network dynamics. Community detection-based methods are proposed for input – output bipartite and variable-constraint network representations and applied to a benchmark chemical process. 2. For the optimality of control, we first derive a computationally efficient algorithm for nonconvex constrained distributed optimization with theoretically provable convergence properties – ELLADA, which is applied to distributed nonlinear model predictive control of a benchmark process system. We derive bilevel optimization formulations for the Lyapunov stability analysis of nonlinear systems, and stochastic optimization for optimally designing the Lyapunov function, which can be further integrated with the optimal process design problem. 3. Towards a more intelligent diagram of process control, we first investigate an advantageous Lie-Sobolev nonlinear system identification scheme and its effect on nonlinear model-based control. For model-free data-driven control, we discuss a distributed implementation of the adaptive dynamic programming idea. For chemical processes where states are mostly unmeasurable, dissipativity learning control (DLC) is proposed as a suitable framework of input – output data-driven control, and applied to several nonlinear processes. Its theoretical foundations are also discussed.

Subjects/Keywords: Data-driven control; Distributed control; Distributed optimization; Nonlinear systems; Process control

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APA (6^th Edition):

Tang, W. (2020). Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/215092

Chicago Manual of Style (16^th Edition):

Tang, Wentao. “Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence.” 2020. Doctoral Dissertation, University of Minnesota. Accessed February 27, 2021. http://hdl.handle.net/11299/215092.

MLA Handbook (7^th Edition):

Tang, Wentao. “Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence.” 2020. Web. 27 Feb 2021.

Vancouver:

Tang W. Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence. [Internet] [Doctoral dissertation]. University of Minnesota; 2020. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11299/215092.

Council of Science Editors:

Tang W. Methods Of Distributed And Nonlinear Process Control: Structuredness, Optimality And Intelligence. [Doctoral Dissertation]. University of Minnesota; 2020. Available from: http://hdl.handle.net/11299/215092

Penn State University

2. Kim, Hunmin. Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid.

Degree: 2018, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/15859huk164

► We have witnessed rapid emergence of cyber-physical systems (CPS), which integrate control systems with advanced technologies of sensing, computation and communication. Many CPS consist of… (more)

Subjects/Keywords: Cyber-physical systems; Distributed control

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APA (6^th Edition):

Kim, H. (2018). Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15859huk164

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):

Kim, Hunmin. “Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid.” 2018. Thesis, Penn State University. Accessed February 27, 2021. https://submit-etda.libraries.psu.edu/catalog/15859huk164.

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

MLA Handbook (7^th Edition):

Kim, Hunmin. “Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid.” 2018. Web. 27 Feb 2021.

Vancouver:

Kim H. Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Feb 27]. Available from: https://submit-etda.libraries.psu.edu/catalog/15859huk164.

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

Council of Science Editors:

Kim H. Distributed Control of Cyber-physical Systems: Security, Economics, and Smart grid. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15859huk164

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

University of Newcastle

3. Griffiths, Michaela Nicole. Modelling and control of inverter sources within a low voltage distributed generation system.

Degree: PhD, 2012, University of Newcastle

URL: http://hdl.handle.net/1959.13/936131

►

Research Doctorate - Doctor of Philosophy (PhD)

The Microgrid has been proposed as a way of combining distributed generation which can have a positive impact… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

The Microgrid has been proposed as a way of combining distributed generation which can have a positive impact on power quality. To solve many of the challenges a microgrid presents, transient modelling is important. This work develops a library for creating a transient model of a microgrid based on transfer function representations of microgrid components, and drawing from techniques to implement simple models of inverters. The developed library allows for the fast, accurate simulation of multiple parallel sources connected to a single load through coupling inductances. Typically, in a microgrid, a controller with a power-frequency droop is used in the sources. This allows for power sharing when the microgrid is in island mode. In this work, the model library was used to develop simulations which illustrated the known problems with the basic droop control implementation and some of the solutions proposed in the literature. One area which had not been addressed in detail in relation to droop control, was the high likelihood of unbalanced loads in a stand-alone system. In this work, a modification to the droop controller was developed which allowed for the reduction of voltage imbalance in the presence of unbalanced loads. The controller calculates the amount of negative sequence voltage at the load, and compensates for this at the source. This unbalance controller was then integrated into a new controller developed to address many of the weaknesses of the standard droop control configuration. Due to the lack of inertia in the power sources, the typical droop controller setup requires storage on the DC side of the inverter (typically a battery) in order to allow for step changes in load demand. In this work, a controller was developed for an AC grid connected storage device (such as a flywheel) which was effective in reducing the need for individual storage for each source. The advantage to this approach is that the grid connected storage device can be chosen to be more environmentally friendly than the batteries which are typically used for the DC storage.

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

Subjects/Keywords: microgrid; distributed generation; droop control

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APA (6^th Edition):

Griffiths, M. N. (2012). Modelling and control of inverter sources within a low voltage distributed generation system. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/936131

Chicago Manual of Style (16^th Edition):

Griffiths, Michaela Nicole. “Modelling and control of inverter sources within a low voltage distributed generation system.” 2012. Doctoral Dissertation, University of Newcastle. Accessed February 27, 2021. http://hdl.handle.net/1959.13/936131.

MLA Handbook (7^th Edition):

Griffiths, Michaela Nicole. “Modelling and control of inverter sources within a low voltage distributed generation system.” 2012. Web. 27 Feb 2021.

Vancouver:

Griffiths MN. Modelling and control of inverter sources within a low voltage distributed generation system. [Internet] [Doctoral dissertation]. University of Newcastle; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1959.13/936131.

Council of Science Editors:

Griffiths MN. Modelling and control of inverter sources within a low voltage distributed generation system. [Doctoral Dissertation]. University of Newcastle; 2012. Available from: http://hdl.handle.net/1959.13/936131

University of Illinois – Urbana-Champaign

4. Doan, Thinh Thanh. On the performance of distributed algorithms for network optimization problems.

Degree: PhD, Electrical & Computer Engr, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/100998

► This thesis considers optimization problems defined over a network of nodes, where each node knows only part of the objective functions. We are motivated by… (more)

▼ This thesis considers optimization problems defined over a network of nodes, where each node knows only part of the objective functions. We are motivated by broad applications of these problems within engineering and sciences, where problems are characterized by either complex networks with a large number of nodes or massive amounts of data. Algorithms for solving these problems should be implemented in parallel between the nodes, and are based only on local computation and communication, necessitating the development of distributed algorithms. Our interest, therefore, is to study distributed methods for solving networked optimization problems, where our focus is on distributed gradient algorithms. In particular, we move beyond the existing results to significantly enhance the performance and reduce the complexity of distributed gradient methods, while taking practical issues, such as communication delays and resource uncertainty, into account. Our goal is to bridge the gap between theory and practice, leading to significant improvement in their performance for solving real-world problems. The remainder of this thesis is to focus on three main thrusts – first, we study the impact of communication delays, an inevitable issue in distributed systems, on the performance of distributed gradient algorithms. Our results address a notable omission in the existing literature, where the delays are often ignored. Second, we study different variants of distributed gradient algorithms, and show that under certain conditions we can improve their convergence. Finally, we study an important problem within engineering and computer science, namely, network resource allocation. For solving this problem, we propose distributed Lagrangian methods and show that our methods are robust to resource uncertainty. In addition, we design a novel algorithm, namely, the distributed gradient balancing protocol, for solving a special case of network resource allocation problems. We show that our algorithm achieves a quadratic convergence time, which improves the convergence of the existing algorithms by a factor of n, the size of the network. Advisors/Committee Members: Beck, Carolyn L (advisor), Beck, Carolyn L (Committee Chair), Srikant, Rayadurgam (committee member), Bose, Subhonmesh (committee member), Liberzon, Daniel (committee member).

Subjects/Keywords: Distributed algorithms; optimization; control theory

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APA (6^th Edition):

Doan, T. T. (2018). On the performance of distributed algorithms for network optimization problems. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/100998

Chicago Manual of Style (16^th Edition):

Doan, Thinh Thanh. “On the performance of distributed algorithms for network optimization problems.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/100998.

MLA Handbook (7^th Edition):

Doan, Thinh Thanh. “On the performance of distributed algorithms for network optimization problems.” 2018. Web. 27 Feb 2021.

Vancouver:

Doan TT. On the performance of distributed algorithms for network optimization problems. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/100998.

Council of Science Editors:

Doan TT. On the performance of distributed algorithms for network optimization problems. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/100998

University of Waterloo

5. Khalifa, Ahmed Said. Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems.

Degree: 2011, University of Waterloo

URL: http://hdl.handle.net/10012/5706

► Solar power is considered a very promising source for electric power generation. The abundance of sunlight over a large area of the earth surface gives… (more)

▼ Solar power is considered a very promising source for electric power generation. The abundance of sunlight over a large area of the earth surface gives rise to several applications of photovoltaic systems. Electricity can be generated from sunlight either directly by employing the photovoltaic effect, or by using energy from the sun to heat up a working fluid that can be used to power up electricity generators. These two technologies are widely used today to provide power to either stand-alone loads or for connection to the power system grid. Maximum power point tracking (MPPT) is a very important consideration that is taken into account when building a new photovoltaic power system. This is needed in order to extract maximum power output from a PV array under varying atmospheric conditions to maximize the return on initial investments. Several techniques have been used to tackle this problem including perturb and observe (P&O), incremental conductance (IncCond) and fuzzy logic based algorithms. Judging between these techniques is based on their speed of locating the maximum power point (MPP) of a PV array under given atmospheric conditions, besides the cost and complexity of implementing them. The P&O and IncCond algorithms have a low implementation complexity but their tracking speed is slow. Fuzzy logic techniques are faster but suffer from high implementation complexity. One of the goals of this thesis is to present an MPPT algorithm implementation that is based on the fractional open circuit voltage method. This technique is easy to implement and offers a fast tracking speed for the MPP of a PV array. It provides an approximation within 4-5% of the maximum power point, which is a tradeoff between the speed and accuracy of operation around the MPP. It offers a speed advantage in grid connected PV systems. The P&O algorithm, which is very common, is difficult to implement under these conditions due to its poor response time. There is also a need for developing control techniques for three phase grid connected PV systems including a method for DC link voltage control that can stabilize the voltage at the inverter input. This area of research is currently growing with the increase in number of PV installations backed up by government incentives in several countries. In addition to the previously mentioned points, this work is intended to be used in further research to replace the representation of PV arrays as a simple DC source when included in power system studies. That is a basic assumption and does not take into consideration the various dynamics caused by changing solar irradiation and surface temperature of the array.

Subjects/Keywords: Control; Photovoltaic; Distributed generation

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APA (6^th Edition):

Khalifa, A. S. (2011). Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5706

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):

Khalifa, Ahmed Said. “Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems.” 2011. Thesis, University of Waterloo. Accessed February 27, 2021. http://hdl.handle.net/10012/5706.

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

MLA Handbook (7^th Edition):

Khalifa, Ahmed Said. “Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems.” 2011. Web. 27 Feb 2021.

Vancouver:

Khalifa AS. Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10012/5706.

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

Council of Science Editors:

Khalifa AS. Control and Interfacing of Three Phase Grid Connected Photovoltaic Systems. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/5706

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

University of Notre Dame

6. Yingbo Zhao. Fundamental Limitations in Networked Control Systems</h1>.

Degree: Electrical Engineering, 2014, University of Notre Dame

URL: https://curate.nd.edu/show/2j62s46716m

► In networked control systems, multiple components (e.g. plants, sensors and controllers) exchange information and cooperate to achieve a joint goal. Unlike traditional control problems,… (more)

▼ In networked control systems, multiple components (e.g. plants, sensors and controllers) exchange information and cooperate to achieve a joint goal. Unlike traditional control problems, a networked control system does not assume perfect transmission of information among components. It has been noted that the quality of communication can affect the performance of a given controller or even the achievable performance for any controller. For instance, if no information can be transmitted from an unstable plant to the controller, then there exists no controller that can stabilize the plant. On the other hand, controllers designed while ignoring the communication constraint cannot provide good performance or even stability. Thus, the interaction between control and communication needs to be understood. The purpose of this thesis is to study the performance limitation posed by the communication constraint. In particular, some traditional control problems are revisited in the networked control framework and new results are obtained. First, by using a time-domain approach, a Bode-like integral formula is obtained for discrete-time linear periodic systems, which can be used to model medium access-constrained systems with periodic communication scheme and asynchronous systems. It is shown that the log integral of sensitivity (which characterizes the disturbance rejection performance) depends only on the open-loop dynamics and the communication scheme but not on the controller, which makes it a fundamental limitation. Then, the networked cooperative platoon of vehicles is studied where a string of vehicles aim to proceed along a given trajectory while keeping a constant distance between adjacent vehicles. It is assumed that each vehicle can control its position based on the spacing error with respect to the preceding vehicle in the string, as well as on coded information transmitted by the lead vehicle. By using an information-theoretic approach, a lower bound to the integral of the sensitivity function of spacing errors with respect to a stochastic disturbance acting on the lead vehicle is established. The derived bound depends on the open-loop poles and zeros of the vehicles’ dynamics as well as on the quality of communication. The lower bound is shown to be tight for a specific communication scheme and controllers. Next, feedback stabilization for Bernoulli jump nonlinear systems is investigated. Bernoulli jump systems have gained importance in the modeling of networked control systems where the communication channel is assumed to be memoryless. By using a mode dependent scattering transformation, the controller design is applicable to the case when the plant and the controller are interconnected through a communication network that introduces constant time delays. Finally, we look into the problem of designing a controller that feedback passivates a discrete-time linear time-invariant system, when the state information is transmitted to the controller across a communication channel. A design… Advisors/Committee Members: Panos Antsaklis, Committee Member, J. William Goodwine, Committee Member, Vijay Gupta, Committee Member, Yih-Fang Huang, Committee Member.

Subjects/Keywords: distributed control; fundamental limitations; networked control

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APA (6^th Edition):

Zhao, Y. (2014). Fundamental Limitations in Networked Control Systems</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/2j62s46716m

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):

Zhao, Yingbo. “Fundamental Limitations in Networked Control Systems</h1>.” 2014. Thesis, University of Notre Dame. Accessed February 27, 2021. https://curate.nd.edu/show/2j62s46716m.

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

MLA Handbook (7^th Edition):

Zhao, Yingbo. “Fundamental Limitations in Networked Control Systems</h1>.” 2014. Web. 27 Feb 2021.

Vancouver:

Zhao Y. Fundamental Limitations in Networked Control Systems</h1>. [Internet] [Thesis]. University of Notre Dame; 2014. [cited 2021 Feb 27]. Available from: https://curate.nd.edu/show/2j62s46716m.

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

Council of Science Editors:

Zhao Y. Fundamental Limitations in Networked Control Systems</h1>. [Thesis]. University of Notre Dame; 2014. Available from: https://curate.nd.edu/show/2j62s46716m

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

University of Illinois – Urbana-Champaign

7. Petrus, Bryan. Distributed parameter control of heat diffusion with solidification.

Degree: PhD, 0133, 2014, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/50691

► Continuous casting is an important engineering process which produces nearly all steel currently used worldwide. Regulation of the temperature of the steel during casting with… (more)

▼ Continuous casting is an important engineering process which produces nearly all steel currently used worldwide. Regulation of the temperature of the steel during casting with water sprays is known to be important to final product quality and safely operating the caster. Yet most current control methods are effectively open-loop, due to the complicated nature of the process. Measurements of the steel temperature cannot be made reliably due to the high temperatures and constant water spray in the caster. Even if feedback could be obtained, the temperature of the steel is governed by a nonlinear partial differential equation (PDE), which presents a challenge for existing control techniques. In the first part of this dissertation, the state-of-the art in industrial control systems for this process is described. The primary difficulty this system deals with is the sensing problem. Instead of physical sensors, a real-time computational model of the caster is used as a ``software sensor.'' Using the model for feedback, a simple proportional integral (PI) controller bank is able to adequately regulate the surface temperature. Using multiple independent 1-D models interpolated to provide a 2-D prediction of the steel temperature, the model is able to run in real-time even at the high casting speeds of a thin-slab steel caster. The model is calibrated through steady state measurements of the thin-slab caster from reliable pyrometer measurements outside the spray zone and metallurgical length detection trials. The use of independent 1-D models is verified by comparing model predictions with transient measurements of roll forces in another caster. The model is further used to perform a computational study of the temperature and shell thickness in a caster during sudden speed changes. In the second part, the control problem is studied for a simpler, but still fundamentally nonlinear PDE model of the caster. Using Lyapunov stability theory for infinite-dimensional systems, a control law is designed that matches the entire distributed temperature of a 1-D slice through control of the heat flux at the steel surface. In the first version, the control law is based on only examining the temperature error, and produces a control law with sharply varying and unbounded heat flux. In the second version, a control law that performs much better is found by considering the error in enthalpy for feedback. The second control design is also proven to work for models better approximating the real system, in particular limits on the heat flux due to the spray water piping system design. In the final part, the control law designed in the second part is simulated on a model including some of the most important difficulties of the real system, namely non-symmetric boundary conditions and actuator saturation, and performs admirably. The controller still uses a software sensor, as in the first part, so the uncertainty of the model is quantitatively examined. Finally, some additional unproven conjectures are offered that are based on… Advisors/Committee Members: Bentsman, Joseph (advisor), Thomas, Brian G. (advisor), Bentsman, Joseph (Committee Chair), Thomas, Brian G. (Committee Chair), Hovakimyan, Naira (committee member), Basar, Tamer (committee member).

Subjects/Keywords: Control systems; Distributed parameter control; Solidification; Modeling

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APA (6^th Edition):

Petrus, B. (2014). Distributed parameter control of heat diffusion with solidification. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/50691

Chicago Manual of Style (16^th Edition):

Petrus, Bryan. “Distributed parameter control of heat diffusion with solidification.” 2014. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/50691.

MLA Handbook (7^th Edition):

Petrus, Bryan. “Distributed parameter control of heat diffusion with solidification.” 2014. Web. 27 Feb 2021.

Vancouver:

Petrus B. Distributed parameter control of heat diffusion with solidification. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/50691.

Council of Science Editors:

Petrus B. Distributed parameter control of heat diffusion with solidification. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/50691

Georgia Tech

8. Lim, Yusun. Game theoretic distributed coordination: drifting environments and constrained communications.

Degree: PhD, Electrical and Computer Engineering, 2014, Georgia Tech

URL: http://hdl.handle.net/1853/52986

► The major objective of this dissertation is extending the capabilities of game theoretic distributed control to more general settings. In particular, we are interested in… (more)

▼ The major objective of this dissertation is extending the capabilities of game theoretic distributed control to more general settings. In particular, we are interested in drifting environments and/or constrained communications. The first part of the dissertation concerns slowly varying dynamics, i.e., drifting environments. A standard assumption in game theoretic learning is a stationary environment, e.g., the game is fixed. We investigate the case of slow variations and show that for sufficiently slow time variations, the limiting behavior “tracks” the stochastically stable states. Since the analysis is regarding Markov processes, the results could be applied to various game theoretic learning rules. In this research, the results were applied to log-linear learning. A mobile sensor coverage example was tested in both simulation and laboratory experiments. The second part considers a problem of coordinating team players' actions without any communications in team-based zero-sum games. Generally, some global signalling devices are required for common randomness between players, but communications are very limited or impossible in many practical applications. Instead of learning a one-shot strategy, we let players coordinate a periodic sequence of deterministic actions and put an assumption on opponent's rationality. Since team players' action sequences are periodic and deterministic, common randomness is no longer required to coordinate players. It is proved that if a length of a periodic action sequence is long enough, then opponents with limited rationality cannot recognize its pattern. Because the opponents cannot recognize that the players are playing deterministic actions, the players' behavior looks like a correlated and randomized joint strategy with empirical distribution of their action sequences. Consequently players can coordinate their action sequences without any communications or global signals, and the resulting action sequences have correlated behavior. Moreover, the notion of micro-players are introduced for efficient learning of long action sequences. Micro-player matching approach provides a new framework that converts the original team-based zero-sum game to a game between micro-players. By introducing a de Bruijn sequence to micro-player matching, we successfully separate the level of opponent's rationality and the size of the game of micro-players. The simulation results are shown to demonstrate the performance of micro-player matching methods. Lastly, the results of the previous two topics are combined by considering a problem of coordinating actions without communications in drifting environments. More specifically, it is assumed that the opponent player in the team-based zero-sum games tries to adjust its strategy in the set of bounded recall strategies. Then the time-varying opponent's strategy can be considered as a dynamic environment parameter in a coordination game between the team players. Additionally, we develop a human testbed program for further study regarding a human as an… Advisors/Committee Members: Shamma, Jeff S. (advisor), Wardi, Yorai (committee member), Fekri, Faramarz (committee member), Feron, Eric (committee member), Howard, Ayanna M. (committee member), Bloch, Matthieu R. (committee member).

Subjects/Keywords: Game theoretic learning; Cooperative control; Distributed control

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APA (6^th Edition):

Lim, Y. (2014). Game theoretic distributed coordination: drifting environments and constrained communications. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/52986

Chicago Manual of Style (16^th Edition):

Lim, Yusun. “Game theoretic distributed coordination: drifting environments and constrained communications.” 2014. Doctoral Dissertation, Georgia Tech. Accessed February 27, 2021. http://hdl.handle.net/1853/52986.

MLA Handbook (7^th Edition):

Lim, Yusun. “Game theoretic distributed coordination: drifting environments and constrained communications.” 2014. Web. 27 Feb 2021.

Vancouver:

Lim Y. Game theoretic distributed coordination: drifting environments and constrained communications. [Internet] [Doctoral dissertation]. Georgia Tech; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1853/52986.

Council of Science Editors:

Lim Y. Game theoretic distributed coordination: drifting environments and constrained communications. [Doctoral Dissertation]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/52986

Georgia Tech

9. Costello, Zachary Kohl. Distributed computation in networked systems.

Degree: PhD, Electrical and Computer Engineering, 2016, Georgia Tech

URL: http://hdl.handle.net/1853/54924

► The objective of this thesis is to develop a theoretical understanding of computation in networked dynamical systems and demonstrate practical applications supported by the theory.… (more)

Subjects/Keywords: Networked control; Nonlinear control; Distributed computation

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APA (6^th Edition):

Costello, Z. K. (2016). Distributed computation in networked systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54924

Chicago Manual of Style (16^th Edition):

Costello, Zachary Kohl. “Distributed computation in networked systems.” 2016. Doctoral Dissertation, Georgia Tech. Accessed February 27, 2021. http://hdl.handle.net/1853/54924.

MLA Handbook (7^th Edition):

Costello, Zachary Kohl. “Distributed computation in networked systems.” 2016. Web. 27 Feb 2021.

Vancouver:

Costello ZK. Distributed computation in networked systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1853/54924.

Council of Science Editors:

Costello ZK. Distributed computation in networked systems. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/54924

University of Waterloo

10. Fadakar, Iman. Spatial Formation Control.

Degree: 2015, University of Waterloo

URL: http://hdl.handle.net/10012/10068

► In this thesis, we study robust spatial formation control from several aspects. First, we study robust adaptive attitude synchronization for a network of rigid body… (more)

▼ In this thesis, we study robust spatial formation control from several aspects. First, we study robust adaptive attitude synchronization for a network of rigid body agents using various attitude error functions defined on SO(3). Our results are particularly useful for networks with large initial attitude difference. We devise an adaptive geometric approach to cope with situations where the inertia matrices are not available for measurement. We use the Frobenius norm as a measure for the difference between the actual values of inertia matrices and their estimated values, to construct the individual adaptive laws of the agents. Compared to the previous methods for synchronization on SO(3) such as those which are based on quaternions, our proposed approach does not contain any attitude representation ambiguity. As the final part of our studies from the attitude synchronization aspect, we analyze robustness to external disturbances and unmodeled dynamics, and propose a method to attenuate such effects. Simulation results illustrate the effectiveness of the proposed approach. In the next part of the thesis, we study the distributed localization of the extremum point of unknown quadratic functions representing various physical or artificial signal potential fields. It is assumed that the value of such functions can be measured at each instant. Using high pass filtering of the measured signals, a linear parametric model is obtained for system identification. For design purposes, we add a consensus term to modify the identification subsystem. Next, we analyze the exponential convergence of the proposed estimation scheme using algebraic graph theory. In addition, we derive a distributed identifiability condition and use it for the construction of distributed extremum seeking control laws. In particular, we show that for a network of connected agents, if each agent contains a portion of the dithering signals, it is still possible to drive the system states to the extremum point provided that the distributed identifiability condition is satisfied. In the final part of this research, several robust control problems for general linear time invariant multi-agent systems are studied. We consider the robust consensus problem in the presence of unknown Lipschitz nonlinearities and polytopic uncertainties in the model of each agent. Next, this problem is solved in the presence of external disturbances. A set of control laws is proposed for the network to attain the consensus task and under the zero initial condition, achieves the desired H-infinity performance. We show that by implementing the modified versions of these control laws, it is possible to perform two-time scales formation control.

Subjects/Keywords: Distributed control; Multi-agent systems; Adaptive control

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

APA (6^th Edition):

Fadakar, I. (2015). Spatial Formation Control. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/10068

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):

Fadakar, Iman. “Spatial Formation Control.” 2015. Thesis, University of Waterloo. Accessed February 27, 2021. http://hdl.handle.net/10012/10068.

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

MLA Handbook (7^th Edition):

Fadakar, Iman. “Spatial Formation Control.” 2015. Web. 27 Feb 2021.

Vancouver:

Fadakar I. Spatial Formation Control. [Internet] [Thesis]. University of Waterloo; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10012/10068.

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

Council of Science Editors:

Fadakar I. Spatial Formation Control. [Thesis]. University of Waterloo; 2015. Available from: http://hdl.handle.net/10012/10068

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

Queens University

11. Ebegbulem, Judith. Distributed control of multi-agent systems using extremum seeking .

Degree: Chemical Engineering, 2016, Queens University

URL: http://hdl.handle.net/1974/14167

► A model free control technique (extremum seeking) is employed to address problems of large-scale systems involving multi-agents in real-time. This thesis focuses on the use… (more)

Subjects/Keywords: Multi-agent systems ; Distributed control ; Extremum seeking control ; Distributed optimization

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APA (6^th Edition):

Ebegbulem, J. (2016). Distributed control of multi-agent systems using extremum seeking . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/14167

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):

Ebegbulem, Judith. “Distributed control of multi-agent systems using extremum seeking .” 2016. Thesis, Queens University. Accessed February 27, 2021. http://hdl.handle.net/1974/14167.

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

MLA Handbook (7^th Edition):

Ebegbulem, Judith. “Distributed control of multi-agent systems using extremum seeking .” 2016. Web. 27 Feb 2021.

Vancouver:

Ebegbulem J. Distributed control of multi-agent systems using extremum seeking . [Internet] [Thesis]. Queens University; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1974/14167.

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

Council of Science Editors:

Ebegbulem J. Distributed control of multi-agent systems using extremum seeking . [Thesis]. Queens University; 2016. Available from: http://hdl.handle.net/1974/14167

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

University of Alberta

12. Marcos, Natalia I. Coordinated-distributed optimal control of large-scale linear dynamic systems.

Degree: PhD, Department of Chemical and Materials Engineering, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/gm80hw111

► Since the late 1970s, the design of chemical processes has evolved towards highly integrated operations that can increase plant efficiency. Although plant-wide integration offers substantial… (more)

▼ Since the late 1970s, the design of chemical processes has evolved towards highly integrated operations that can increase plant efficiency. Although plant-wide integration offers substantial opportunities to improve the performance of an entire plant, it often results in large-scale systems that are challenging to control. Distributed control has attracted increasing attention in recent years and is seen as a promising new strategy for control of large-scale systems. This thesis focuses on a class of distributed control schemes, which is referred to as 'coordinated-distributed' control. The coordinated-distributed control schemes proposed in this work use a coordinator that exchanges information with local controllers. This exchange of information allows the coordinator to iteratively adjust (coordinate) the optimal control problem for each of the local subsystems to drive their solutions toward the plant-wide optimal performance operations. In this work, coordinated-distributed control schemes are formulated for dynamic linear systems that can be locally controlled by linear quadratic controllers or model predictive controllers. Two distinct methods are used for coordination of the local controllers: the prediction-driven coordination method and the price-driven coordination method. A common characteristic in both coordination methods is the computation of a price vector. The price vector is updated iteratively by the coordinator to achieve the desired plant-wide optimal performance. The coordinated-distributed control schemes proposed in this work assume the same execution rate for the local controllers. An extension for coordination of local controllers that are executed at different rates is also presented. Different strategies for dual-rate coordination are discussed and the one that can provide the most performance improvement is analyzed in detail. The coordinated-distributed control strategies proposed in this thesis have significant potential for improving the performance of current industrial process control systems. The proposed coordinated-distributed control schemes do not require a radical new configuration of the decentralized controllers. They can be constructed with minor modifications to the existing decentralized control systems.

Subjects/Keywords: distributed control; hierarchical control; large-scale optimization; coordination; optimal control; decomposition

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APA (6^th Edition):

Marcos, N. I. (2011). Coordinated-distributed optimal control of large-scale linear dynamic systems. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/gm80hw111

Chicago Manual of Style (16^th Edition):

Marcos, Natalia I. “Coordinated-distributed optimal control of large-scale linear dynamic systems.” 2011. Doctoral Dissertation, University of Alberta. Accessed February 27, 2021. https://era.library.ualberta.ca/files/gm80hw111.

MLA Handbook (7^th Edition):

Marcos, Natalia I. “Coordinated-distributed optimal control of large-scale linear dynamic systems.” 2011. Web. 27 Feb 2021.

Vancouver:

Marcos NI. Coordinated-distributed optimal control of large-scale linear dynamic systems. [Internet] [Doctoral dissertation]. University of Alberta; 2011. [cited 2021 Feb 27]. Available from: https://era.library.ualberta.ca/files/gm80hw111.

Council of Science Editors:

Marcos NI. Coordinated-distributed optimal control of large-scale linear dynamic systems. [Doctoral Dissertation]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/gm80hw111

Delft University of Technology

13. Todorović, Ugljesa (author). Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:89d40085-107e-46e9-89cd-7d672529617f

►

Due to the yearly increase in the number of vehicles and the need for transportation, traffic congestion has become a crucial problem in today's society.… (more)

▼

Due to the yearly increase in the number of vehicles and the need for transportation, traffic congestion has become a crucial problem in today's society. There is a need for a sustainable solution to reduce or even eliminate traffic jams. Freeway traffic control has shown to be a sustainable solution to this problem. Especially the implementation of Ramp Metering (RM) installations and Variable Speed Limits (VSLs) as control measures is currently a widely researched area because the proper coordination of those measures can significantly reduce traffic congestion, traffic emissions and the risk of accidents. The Model Predictive Control (MPC) framework has shown outstanding capabilities for coordinated control of RM installations and VSLs. However, the inherent nonlinearity of traffic flow, in combination with the discrete nature of VSLs and the continuous nature of RM rates, yields a Mixed Integer Nonlinear Programming (MINLP) optimisation problem that has to be solved within every controller sampling interval. The computational time that is needed to solve MINLP problems generally increases exponentially with the size of the problem. Therefore, the implementation of MPC to large freeway networks remains challenging. This work proposes two novel MPC algorithms for coordinated control of continuous RM rates and discrete VSLs on large freeway networks. Both algorithms use a distributed control architecture and an alternating optimisation scheme to relax the MINLP problems and, hence, offer a trade-off between computational complexity and system performance. A case study is performed to evaluate the performance of both algorithms. In this case study a 30 km long freeway network is used that contains six VSLs and three RM installations. The first part of the case study shows that relaxing the VSLs to be continuous decision variables instead of discrete decision variables in the optimisation problems results in a major performance loss with a distributed architecture. This result contrasts with many related works, where the MINLP optimisation problems are relaxed by considering the VSLs to be continuous decision variables. The second part of the case study evaluates the proposed distributed algorithms by comparing their performance to the more conventional centralised and decentralised MPC algorithms. Both proposed algorithms have a lower computational complexity than the centralised algorithm, as they manage to solve the optimisation problems within the controller sampling intervals. Moreover, one of the proposed algorithms has a system performance that is remarkably similar to the optimal performance of the centralised algorithm.

Systems and Control

Advisors/Committee Members: Frejo, Jose Ramon D. (mentor), De Schutter, Bart (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Alternating Optimisation; Model Predictive Control; Distributed Control; Freeway Traffic Control

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APA (6^th Edition):

Todorović, U. (. (2019). Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:89d40085-107e-46e9-89cd-7d672529617f

Chicago Manual of Style (16^th Edition):

Todorović, Ugljesa (author). “Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation.” 2019. Masters Thesis, Delft University of Technology. Accessed February 27, 2021. http://resolver.tudelft.nl/uuid:89d40085-107e-46e9-89cd-7d672529617f.

MLA Handbook (7^th Edition):

Todorović, Ugljesa (author). “Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation.” 2019. Web. 27 Feb 2021.

Vancouver:

Todorović U(. Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Feb 27]. Available from: http://resolver.tudelft.nl/uuid:89d40085-107e-46e9-89cd-7d672529617f.

Council of Science Editors:

Todorović U(. Model Predictive Control for Large Freeway Networks: An approach using a distributed control architecture and alternating optimisation. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:89d40085-107e-46e9-89cd-7d672529617f

University of Illinois – Urbana-Champaign

14. Rousan, Tamer Mohammad. Distributed energy resource integration: design, integration and control.

Degree: MS, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/97643

► Energy independence, climate change, sustainability and increased reliability are considered key drivers for the growing deployment and penetration of distributed energy resources into the electric… (more)

▼ Energy independence, climate change, sustainability and increased reliability are considered key drivers for the growing deployment and penetration of distributed energy resources into the electric grid. But when distributed energy resources (DERs) are integrated together and are interconnected with loads within a defined electric boundary, we end up with what the industry calls a microgrid, which is essentially a small-scale power system that is capable of disconnecting and reconnecting to the utility grid. When the utility grid experiences a disturbance, a microgrid can disconnect from the utility grid and island its interconnected loads, thus continuing to provide energy service until the utility grid is back on. A microgrid provides resiliency and reliability to its interconnected loads. In the relatively short history of microgrids, many were built as small research projects. As the cost of DERs continues to decline, as microgrid technologies continue to advance, and as customer expectations for a higher level of resiliency and reliability continue to rise, the need for utilities and policymakers to better understand the functionality and impact of microgrids on the electric distribution grid becomes evident. This thesis discusses in depth the design, integration and control of the most advanced microgrid in North America. The thesis provides a comprehensive review of the engineering studies, analysis and considerations that are key to designing utility-scale microgrids. Furthermore, the thesis dives deep into the control strategies and layers that allow this microgrid to deliver the higher levels of reliability and resiliency that it promises, as well as a whole host of other benefits that can only be achieved when these complex control layers are deployed and properly implemented. The microgrid design was based on well defined use-cases that will be implemented, tested and analyzed in the future, to gain the necessary knowledge and expertise in the overall potential benefits of microgrids. This work provides the electric power community with a vision for the benefits that advanced utility-scale microgrids can bring to the electric grid and to utility customers. Advisors/Committee Members: Sauer, Peter W (advisor).

Subjects/Keywords: Microgrid; Distributed energy resources; Primary control; Secondary control; Tertiary control; Islanded

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APA (6^th Edition):

Rousan, T. M. (2017). Distributed energy resource integration: design, integration and control. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97643

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):

Rousan, Tamer Mohammad. “Distributed energy resource integration: design, integration and control.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/97643.

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

MLA Handbook (7^th Edition):

Rousan, Tamer Mohammad. “Distributed energy resource integration: design, integration and control.” 2017. Web. 27 Feb 2021.

Vancouver:

Rousan TM. Distributed energy resource integration: design, integration and control. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/97643.

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

Council of Science Editors:

Rousan TM. Distributed energy resource integration: design, integration and control. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97643

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

University of New South Wales

15. Wang, Ruigang. Flexible and Scalable Nonlinear Process Control Based on Contraction Theory.

Degree: Chemical Engineering, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/58092 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45385/SOURCE02?view=true

► Advances in information and network technology enable the development of ``Smart Plants", which are more agile, cost-effective and operating continuously close to the market. In… (more)

▼ Advances in information and network technology enable the development of ``Smart Plants", which are more agile, cost-effective and operating continuously close to the market. In response to the continuously varying feedstock supply and product market demand, the process operation strategy, including setpoints and economic stage costs, needs to be frequently updated to improve the process economy. This new paradigm requires: (1) a flexible and equilibrium-independent control design method, which does not need exact information on the setpoints; (2) an optimization-based online control approach that achieves optimal operational economy during the transitions; and (3) a scalable distributed control framework for large-scale interacted networked systems.In this thesis, a systematic, flexible and scalable control design method based on contraction (a concept related to incremental stability) theory is developed. The main results include:(1) A constructive method is proposed to search for a pair of control contraction metric (CCM) and differential state feedback law for standalone systems. One advantage of the contraction-based method is that it allows for decoupling the control design from the prior knowledge of setpoints or references, which leads to an equilibrium-independent system analysis and control design approach. Another advantage is that the control synthesis can be formulated as a convex state-dependent LMI problem, which can be solved in a computational tractable way, \emph{e.g.}, using the sum-of-squares programming.(2) The above-proposed method is extended to distributed plantwide control by using the concept of differential dissipativity. Plantwide incremental exponential stability with respect to time-varying setpoints/references together with a bounded incremental L₂ gain condition for disturbance attenuation are achieved. The alternative direction method of multipliers (ADMM) algorithm is employed to solve the large-scale synthesis problem in a distributed manner.(3) A distributed economic model predictive control (DEMPC) scheme is developed by using the sum-separable CCM, which can be obtained from previous plantwide control design method. An exponentially shrinking tube constraint, which is a contraction inequality derived from the CCM, is added to the DEMPC formulation. The closed-loop stability under the proposed DEMPC is independent of the setpoints/references and economic stage cost functions. The proposed DEMPC can minimize self-interested operational costs for individual subsystems while achieving plantwide stability (for the networked system) through the ADMM algorithm.

Subjects/Keywords: Model Predictive Control; Nonlinear Control; Distributed Control; Contraction Theory; Smart Manufacturing

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APA (6^th Edition):

Wang, R. (2017). Flexible and Scalable Nonlinear Process Control Based on Contraction Theory. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/58092 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45385/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Wang, Ruigang. “Flexible and Scalable Nonlinear Process Control Based on Contraction Theory.” 2017. Doctoral Dissertation, University of New South Wales. Accessed February 27, 2021. http://handle.unsw.edu.au/1959.4/58092 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45385/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Wang, Ruigang. “Flexible and Scalable Nonlinear Process Control Based on Contraction Theory.” 2017. Web. 27 Feb 2021.

Vancouver:

Wang R. Flexible and Scalable Nonlinear Process Control Based on Contraction Theory. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2021 Feb 27]. Available from: http://handle.unsw.edu.au/1959.4/58092 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45385/SOURCE02?view=true.

Council of Science Editors:

Wang R. Flexible and Scalable Nonlinear Process Control Based on Contraction Theory. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/58092 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45385/SOURCE02?view=true

Penn State University

16. Yang, Manda. development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes.

Degree: 2018, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/15022mxy192

► The distributed parameter system (DPS) is of significant importance in many chemical and material industry processes. This kind of systems shows spatial variation because of… (more)

Subjects/Keywords: distributed parameter system; nonlinear control; model reduction

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APA (6^th Edition):

Yang, M. (2018). development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15022mxy192

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):

Yang, Manda. “development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes.” 2018. Thesis, Penn State University. Accessed February 27, 2021. https://submit-etda.libraries.psu.edu/catalog/15022mxy192.

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

MLA Handbook (7^th Edition):

Yang, Manda. “development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes.” 2018. Web. 27 Feb 2021.

Vancouver:

Yang M. development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Feb 27]. Available from: https://submit-etda.libraries.psu.edu/catalog/15022mxy192.

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

Council of Science Editors:

Yang M. development of efficient modeling and diffusion control approaches of nonlinear spatially distributed processes. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15022mxy192

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

Universidade Nova

17. Vale, Tiago Marques do. A modular distributed transactional memory framework.

Degree: 2012, Universidade Nova

URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/8738

►

Dissertação para obtenção do Grau de Mestre em Engenharia Informática

The traditional lock-based concurrency control is complex and error-prone due to its low-level nature and… (more)

Subjects/Keywords: Transactional memory; Distributed systems; Concurrency control; Replication

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APA (6^th Edition):

Vale, T. M. d. (2012). A modular distributed transactional memory framework. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/8738

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):

Vale, Tiago Marques do. “A modular distributed transactional memory framework.” 2012. Thesis, Universidade Nova. Accessed February 27, 2021. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/8738.

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

MLA Handbook (7^th Edition):

Vale, Tiago Marques do. “A modular distributed transactional memory framework.” 2012. Web. 27 Feb 2021.

Vancouver:

Vale TMd. A modular distributed transactional memory framework. [Internet] [Thesis]. Universidade Nova; 2012. [cited 2021 Feb 27]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/8738.

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

Council of Science Editors:

Vale TMd. A modular distributed transactional memory framework. [Thesis]. Universidade Nova; 2012. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/8738

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

18. Kasis, Andreas. Distributed schemes for stability and optimality in power networks.

Degree: PhD, 2018, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/270819

► The generation, transmission and distribution of electricity underpins modern technology and constitutes a necessary element for our development and economic functionality. In the recent years,… (more)

▼ The generation, transmission and distribution of electricity underpins modern technology and constitutes a necessary element for our development and economic functionality. In the recent years, as a result of environmental concerns and technological advances, private and public investment have been steadily turning towards renewable sources of energy, resulting in a growing penetration of those in the power network. This poses additional challenges in the control of power networks, since renewable generation is in general intermittent, and a large penetration may cause frequent deviations between generation and demand, which can harm power quality and even cause blackouts. Load side participation in the power grid is considered by many a means to counterbalance intermittent generation, due to its ability to provide fast response at urgencies. Industrial loads as well as household appliances, may respond to frequency deviations by adjusting their demand in order to support the network. This is backed by the development of relevant sensing and computation technologies. The increasing numbers of local renewable sources of generation along the introduction of controllable loads dramatically increases the number of active elements in the power network, making traditionally implemented, centralised control dicult and costly. This demonstrates the need for the employment of highly distributed schemes in the control of generation and demand. Such schemes need to ensure the smooth and stable operation of the network. Furthermore, an issue of fairness among controllable loads needs to be considered, such that it is ensured that all loads share the burden to support the network evenly and with minimum disruption. We study the dynamic behaviour of power networks within the primary and secondary frequency control timeframes. Using tools from non-linear control and optimisation, we present methods to design distributed control schemes for generation and demand that guarantee stability and fairness in power allocation. Our analysis provides relaxed stability conditions in comparison with current literature and allows the inclusion of practically relevant classes of generation and demand dynamics that have not been considered within this setting, such as of higher order dynamics. Furthermore, fairness in the power allocation between loads is guaranteed by ensuring that the equilibria of the system are solutions to appropriately constructed optimisation problems. It is evident that a synchronising variable is required for optimality to be achieved and frequency is used as such in primary control schemes whereas for secondary frequency control a dierent synchronising variable is adopted. For the latter case, the requirements of the synchronising feedback scheme have been relaxed with the use of an appropriate observer, showing that stability and optimality guarantees are retained. The problem of secondary frequency regulation where ancillary services are provided from switching loads is also considered. Such loads switch on and off…

Subjects/Keywords: Power systems; Distributed optimisation; Nonlinear control

5 more images…

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

APA (6^th Edition):

Kasis, A. (2018). Distributed schemes for stability and optimality in power networks. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/270819

Chicago Manual of Style (16^th Edition):

Kasis, Andreas. “Distributed schemes for stability and optimality in power networks.” 2018. Doctoral Dissertation, University of Cambridge. Accessed February 27, 2021. https://www.repository.cam.ac.uk/handle/1810/270819.

MLA Handbook (7^th Edition):

Kasis, Andreas. “Distributed schemes for stability and optimality in power networks.” 2018. Web. 27 Feb 2021.

Vancouver:

Kasis A. Distributed schemes for stability and optimality in power networks. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Feb 27]. Available from: https://www.repository.cam.ac.uk/handle/1810/270819.

Council of Science Editors:

Kasis A. Distributed schemes for stability and optimality in power networks. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://www.repository.cam.ac.uk/handle/1810/270819

University of Notre Dame

19. Eloy Garcia. Model-Based Control over Networks: Architecture and Performance</h1>.

Degree: Electrical Engineering, 2012, University of Notre Dame

URL: https://curate.nd.edu/show/ft848p60v4k

► Control systems that transmit information over a shared digital communication network offer improved efficiency, flexibility, and reliability compared to traditional closed loop feedback systems.… (more)

▼ Control systems that transmit information over a shared digital communication network offer improved efficiency, flexibility, and reliability compared to traditional closed loop feedback systems. The use of a limited bandwidth network for control communication presents new challenges on the design and analysis of network interconnected systems due to quantization, time delays, and the absence of feedback measurements for long intervals of time. In this dissertation we use the Model-Based Networked Control Systems (MB-NCS) configuration for control of uncertain Networked Control Systems (NCS). We consider plant-model mismatch in NCS since the absence of continuous feedback significantly increases sensitivity of the system to model uncertainties, which are commonly present in most control applications. A nominal model of the system is used in MB-NCS to generate an estimate of the plant state when no measurement information is available. The central idea in this approach is to obtain a comparable system performance with respect to the non-networked closed loop system but limiting the use of network resources. Then the overall performance of NCS has to consider the response of the control and output signals along with the excessive use of network bandwidth. Different approaches that consider dynamical uncertain systems and allow longer sensor update intervals are discussed in this dissertation. They are primarily based on the implementation of event-based strategies that lead the sensor to send feedback measurements to the controller only when it is necessary to do so. This strategy is also used for decentralized control of networked systems and for computation of optimal sensor update instants and for design of optimal MB-NCS controllers. On-line estimation of the system parameters also permits longer update intervals by upgrading the model of the system that is used to generate the control input between sensor updates. Additionally, lifting techniques are used for stability analysis of MB-NCS. By using these methods we are able to consider model-based multi-rate periodic systems and MB-NCS that are implemented using the network in the sensor-controller and the controller-actuator channels. Finally, control architectures for reference input tracking with limited feedback information are also discussed in this dissertation. Advisors/Committee Members: Peter Bauer, Committee Member, Vijay Gupta, Committee Member, Panos J. Antsaklis, Committee Chair, William Goodwine, Committee Member.

Subjects/Keywords: distributed control; parameter estimation; uncertain systems

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APA (6^th Edition):

Garcia, E. (2012). Model-Based Control over Networks: Architecture and Performance</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/ft848p60v4k

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):

Garcia, Eloy. “Model-Based Control over Networks: Architecture and Performance</h1>.” 2012. Thesis, University of Notre Dame. Accessed February 27, 2021. https://curate.nd.edu/show/ft848p60v4k.

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

MLA Handbook (7^th Edition):

Garcia, Eloy. “Model-Based Control over Networks: Architecture and Performance</h1>.” 2012. Web. 27 Feb 2021.

Vancouver:

Garcia E. Model-Based Control over Networks: Architecture and Performance</h1>. [Internet] [Thesis]. University of Notre Dame; 2012. [cited 2021 Feb 27]. Available from: https://curate.nd.edu/show/ft848p60v4k.

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

Council of Science Editors:

Garcia E. Model-Based Control over Networks: Architecture and Performance</h1>. [Thesis]. University of Notre Dame; 2012. Available from: https://curate.nd.edu/show/ft848p60v4k

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

Michigan Technological University

20. Bordeau, Kyle. AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES.

Degree: MS, Department of Mechanical Engineering-Engineering Mechanics, 2013, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etds/629

► This thesis will present strategies for the use of plug-in electric vehicles on smart and microgrids. MATLAB is used as the design tool for… (more)

Subjects/Keywords: distributed control; electric vehicles; Mechanical Engineering

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APA (6^th Edition):

Bordeau, K. (2013). AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etds/629

Chicago Manual of Style (16^th Edition):

Bordeau, Kyle. “AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES.” 2013. Masters Thesis, Michigan Technological University. Accessed February 27, 2021. https://digitalcommons.mtu.edu/etds/629.

MLA Handbook (7^th Edition):

Bordeau, Kyle. “AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES.” 2013. Web. 27 Feb 2021.

Vancouver:

Bordeau K. AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES. [Internet] [Masters thesis]. Michigan Technological University; 2013. [cited 2021 Feb 27]. Available from: https://digitalcommons.mtu.edu/etds/629.

Council of Science Editors:

Bordeau K. AGENT BASED, DISTRIBUTED CONTROL STRATEGIES AND OPTIMIZATION OF PLUG-IN ELECTRIC VEHICLES ON SMART/MICROGRID ARCHITECTURES. [Masters Thesis]. Michigan Technological University; 2013. Available from: https://digitalcommons.mtu.edu/etds/629

University of Illinois – Urbana-Champaign

21. Nguyen Ba, Canh Son. Adaptive control for availability and consistency in distributed key-values stores.

Degree: MS, 0112, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/73093

► The CAP theorem says that distributed key-value stores can only provide bounded consistency (C) and availability (A) under the presence of partition (P). Recent work… (more)

Subjects/Keywords: distributed databases; consistency; availability; Adaptive Control; riak

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APA (6^th Edition):

Nguyen Ba, C. S. (2015). Adaptive control for availability and consistency in distributed key-values stores. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/73093

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):

Nguyen Ba, Canh Son. “Adaptive control for availability and consistency in distributed key-values stores.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/73093.

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

MLA Handbook (7^th Edition):

Nguyen Ba, Canh Son. “Adaptive control for availability and consistency in distributed key-values stores.” 2015. Web. 27 Feb 2021.

Vancouver:

Nguyen Ba CS. Adaptive control for availability and consistency in distributed key-values stores. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/73093.

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

Council of Science Editors:

Nguyen Ba CS. Adaptive control for availability and consistency in distributed key-values stores. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/73093

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

22. Wu, Xiaofan. Sparsity-promoting optimal control of power networks.

Degree: PhD, Electrical/Computer Engineering, 2016, University of Minnesota

URL: http://hdl.handle.net/11299/185164

► In this dissertation, we study the problems of structure design and optimal control of consensus and synchronization networks. Our objective is to design controller that… (more)

▼ In this dissertation, we study the problems of structure design and optimal control of consensus and synchronization networks. Our objective is to design controller that utilize limited information exchange between subsystems in large-scale networks. To obtain controllers with low communication requirements, we seek solutions to regularized versions of the H2 optimal control problem. The proposed framework can be leveraged for control design in applications like wide-area control in bulk power systems, frequency regulation in power system/microgrids, synchronization of nonlinear oscillator networks, etc. The structure of the dissertation is organized as follows. In Part I, we focus on the optimal control problems in systems with symmetries and consensus/synchronization networks. They are characterized by structural constraints that arise either from the underlying group structure or the lack of the absolute measurements for a part of the state vector. Our framework solves the regularized versions of the H2 optimal control problems that allow the state-space representations that are used to quantify the system’s performance and sparsity of the controller to be expressed in different sets of coordinates. For systems with symmetric dynamic matrices, the problem of minimizing the H2 or Hinfinity performance of the closed-loop system can be cast as a convex optimization problem. Studying the symmetric component of a general system’s dynamic matrices provides bounds on the H2 and Hinfinity performance of the original system. Part II studies wide-area control of inter-area oscillations in power systems. Our input-output analysis examines power spectral density and variance amplification of stochastically forced systems and offers new insights relative to modal approaches. To improve upon the limitations of conventional wide-area control strategies, we also study the problem of signal selection and optimal design of sparse and block-sparse wide- area controllers. We show how different sparsity-promoting penalty functions can be used to achieve a desired balance between closed-loop performance and communication complexity. In particular, we demonstrate that the addition of certain long-range communication links and careful retuning of the local controllers represent an effective means for improving system performance. In Part III, we apply the sparsity-promoting optimal control framework to two problem encounters in distributed networks. First, we consider the optimal frequency regulation problem in power systems and propose a principled heuristic to identify the structure and gains of the distributed integral control layer. We define the proposed distributed PI-controller and formulate the resulting static output-feedback control problem. Second, we develop a structured optimal-control framework to design coupling gains for synchronization of weakly nonlinear oscillator circuits connected in resistive networks with arbitrary topologies. The structured optimal-control problem allows us to seek a decentralized control strategy…

Subjects/Keywords: control; distributed systems; optimization; power systems

11 more images…

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APA (6^th Edition):

Wu, X. (2016). Sparsity-promoting optimal control of power networks. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/185164

Chicago Manual of Style (16^th Edition):

Wu, Xiaofan. “Sparsity-promoting optimal control of power networks.” 2016. Doctoral Dissertation, University of Minnesota. Accessed February 27, 2021. http://hdl.handle.net/11299/185164.

MLA Handbook (7^th Edition):

Wu, Xiaofan. “Sparsity-promoting optimal control of power networks.” 2016. Web. 27 Feb 2021.

Vancouver:

Wu X. Sparsity-promoting optimal control of power networks. [Internet] [Doctoral dissertation]. University of Minnesota; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11299/185164.

Council of Science Editors:

Wu X. Sparsity-promoting optimal control of power networks. [Doctoral Dissertation]. University of Minnesota; 2016. Available from: http://hdl.handle.net/11299/185164

University of Cambridge

23. Kasis, Andreas. Distributed schemes for stability and optimality in power networks.

Degree: PhD, 2018, University of Cambridge

URL: https://doi.org/10.17863/CAM.17744 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744460

► The generation, transmission and distribution of electricity underpins modern technology and constitutes a necessary element for our development and economic functionality. In the recent years,… (more)

▼ The generation, transmission and distribution of electricity underpins modern technology and constitutes a necessary element for our development and economic functionality. In the recent years, as a result of environmental concerns and technological advances, private and public investment have been steadily turning towards renewable sources of energy, resulting in a growing penetration of those in the power network. This poses additional challenges in the control of power networks, since renewable generation is in general intermittent, and a large penetration may cause frequent deviations between generation and demand, which can harm power quality and even cause blackouts. Load side participation in the power grid is considered by many a means to counterbalance intermittent generation, due to its ability to provide fast response at urgencies. Industrial loads as well as household appliances, may respond to frequency deviations by adjusting their demand in order to support the network. This is backed by the development of relevant sensing and computation technologies. The increasing numbers of local renewable sources of generation along the introduction of controllable loads dramatically increases the number of active elements in the power network, making traditionally implemented, centralised control dicult and costly. This demonstrates the need for the employment of highly distributed schemes in the control of generation and demand. Such schemes need to ensure the smooth and stable operation of the network. Furthermore, an issue of fairness among controllable loads needs to be considered, such that it is ensured that all loads share the burden to support the network evenly and with minimum disruption. We study the dynamic behaviour of power networks within the primary and secondary frequency control timeframes. Using tools from non-linear control and optimisation, we present methods to design distributed control schemes for generation and demand that guarantee stability and fairness in power allocation. Our analysis provides relaxed stability conditions in comparison with current literature and allows the inclusion of practically relevant classes of generation and demand dynamics that have not been considered within this setting, such as of higher order dynamics. Furthermore, fairness in the power allocation between loads is guaranteed by ensuring that the equilibria of the system are solutions to appropriately constructed optimisation problems. It is evident that a synchronising variable is required for optimality to be achieved and frequency is used as such in primary control schemes whereas for secondary frequency control a dierent synchronising variable is adopted. For the latter case, the requirements of the synchronising feedback scheme have been relaxed with the use of an appropriate observer, showing that stability and optimality guarantees are retained. The problem of secondary frequency regulation where ancillary services are provided from switching loads is also considered. Such loads switch on and off…

Subjects/Keywords: 621.319; Power systems; Distributed optimisation; Nonlinear control

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APA (6^th Edition):

Kasis, A. (2018). Distributed schemes for stability and optimality in power networks. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.17744 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744460

Chicago Manual of Style (16^th Edition):

Kasis, Andreas. “Distributed schemes for stability and optimality in power networks.” 2018. Doctoral Dissertation, University of Cambridge. Accessed February 27, 2021. https://doi.org/10.17863/CAM.17744 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744460.

MLA Handbook (7^th Edition):

Kasis, Andreas. “Distributed schemes for stability and optimality in power networks.” 2018. Web. 27 Feb 2021.

Vancouver:

Kasis A. Distributed schemes for stability and optimality in power networks. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Feb 27]. Available from: https://doi.org/10.17863/CAM.17744 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744460.

Council of Science Editors:

Kasis A. Distributed schemes for stability and optimality in power networks. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://doi.org/10.17863/CAM.17744 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744460

University of New South Wales

24. Song, Ruihao. Control strategies for distributed energy resources in islanded microgrids.

Degree: Electrical Engineering & Telecommunications, 2018, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/61842 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57640/SOURCE02?view=true

► Modern power grids are mainly dominated by highly centralized generations (CG) such as thermal power generation. For consideration of construction cost and fuel transportation difficulties,… (more)

▼ Modern power grids are mainly dominated by highly centralized generations (CG) such as thermal power generation. For consideration of construction cost and fuel transportation difficulties, people tend to build centralized power plant instead of distributed installations. However, with the growing concern of environmental issues, renewable energy generations (REGs) such as wind power and photovoltaics (PV), have drawn increasing attention because they have potentials to be the main future power supply source. The key feature of REGs is that they have highly topographic preferences for the location of the power plant, for example, wind power plant can often be found in offshore areas while the large-scale solar farms are usually set up in the rural solar-rich area. The microgrid (MG) concept is proposed to encounter the impact of REGs. This research is focused on islanded operation control of the microgrid because currently microgrid applications are more likely to be found in rural areas where no grid connection is available. The difficulties in microgrids can be categorized into two main aspects: power sharing among distributed generations (DGs) and global voltage regulation. The proposed methods in this thesis are improved versions of conventional linear control systems applied to microgrids. Simulations and experiments are carried out to validate the proposed theory. It is pivotal for the simulation results to match up with theoretical expectations. In this thesis, two innovative methods are presented: a fuzzy logic compensating method for faster voltage restoration after transients, and a virtual cooperative control for power sharing among DGs. The proposed methods successfully alleviate the problems and proved working by computer simulations as well as experiments on a laboratory setup. Thus, they could be potential candidates of solutions for future adoption in practice. Advisors/Committee Members: Hredzak, Branislav, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Phung, Toan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.

Subjects/Keywords: Microgrids; Distributed generation; Power sharing control

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APA (6^th Edition):

Song, R. (2018). Control strategies for distributed energy resources in islanded microgrids. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/61842 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57640/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Song, Ruihao. “Control strategies for distributed energy resources in islanded microgrids.” 2018. Masters Thesis, University of New South Wales. Accessed February 27, 2021. http://handle.unsw.edu.au/1959.4/61842 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57640/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Song, Ruihao. “Control strategies for distributed energy resources in islanded microgrids.” 2018. Web. 27 Feb 2021.

Vancouver:

Song R. Control strategies for distributed energy resources in islanded microgrids. [Internet] [Masters thesis]. University of New South Wales; 2018. [cited 2021 Feb 27]. Available from: http://handle.unsw.edu.au/1959.4/61842 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57640/SOURCE02?view=true.

Council of Science Editors:

Song R. Control strategies for distributed energy resources in islanded microgrids. [Masters Thesis]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/61842 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:57640/SOURCE02?view=true

University of Oklahoma

25. Yang, Mu. Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations.

Degree: PhD, 2017, University of Oklahoma

URL: http://hdl.handle.net/11244/53080

► This dissertation is devoted to the development of distributed algorithms, with which nodes in a large decentralized network can accomplish tasks that are seemingly difficult… (more)

▼ This dissertation is devoted to the development of distributed algorithms, with which nodes in a large decentralized network can accomplish tasks that are seemingly difficult without an omniscient central node. The tasks include estimating the graph spectrum, from which each node can draw its own conclusion about the network structure, computing the eigenvector centrality, from which every node can judge its own importance in the network, and solving a system of linear equations whose data are scattered across the network or discovering that no solution exists. The ability to perform these tasks enhances the capability of existing and emerging networks such as smart power grids, social networks, and ad hoc sensor networks, potentially allowing them to function in ways that are not previously thought to be possible. We begin with the design of a novel, two-stage distributed algorithm that enables nodes in an undirected and connected graph to jointly estimate the spectrum of a matrix associated with the graph, which includes the adjacency and Laplacian matrices as special cases. In the first stage, the algorithm uses a discrete-time linear iteration and the Cayley-Hamilton theorem to convert the problem into one of solving linear equations, where each equation is known to a node. In the second stage, if the nodes happen to know that said matrix is cyclic, the algorithm uses a Lyapunov approach to asymptotically solve the equations with an exponential rate of convergence. Otherwise, it uses a random perturbation approach and a structural controllability result to approximately solve the equations with an error that can be made small. We then consider the fundamental problem of cooperatively solving a general system of linear equations over a network, for which a continuous-time distributed algorithm is devised. We show that the algorithm enables the nodes to asymptotically agree on a solution when there are infinitely many solutions, determine the solution when there is exactly one, and detect that no solution exists when there are none. We also establish that the algorithm is globally exponentially convergent, derive an explicit lower bound on its convergence rate that it can do no worse than, and prove that the larger the network's algebraic connectivity, or the further away from being singular the system of equations, the larger this lower bound. Finally, we address the open question of whether it is possible to calculate eigenvector centrality over a network. We provide an affirmative answer by presenting a class of continuous-time distributed algorithms and an asynchronous gossip algorithm, which allow every node i in a graph to compute the ith entry of the Perron-Frobenius eigenvector of a symmetric, Metzler, and irreducible matrix induced by the graph, as well as the corresponding eigenvalue, when node i knows only row i of the matrix. We show that each continuous-time distributed algorithm is a nonlinear networked dynamical system with a skew-symmetric structure, whose state is guaranteed to… Advisors/Committee Members: Tang, Choon Yik (advisor), Cruz, J. R. (committee member), Lakshmivarahan, S. (committee member), Thulasiraman, Krishnaiyan (committee member), Runolfsson, Thordur (committee member).

Subjects/Keywords: Control; Distributed Algorithm; Network System; Dynamic System

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APA (6^th Edition):

Yang, M. (2017). Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/53080

Chicago Manual of Style (16^th Edition):

Yang, Mu. “Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations.” 2017. Doctoral Dissertation, University of Oklahoma. Accessed February 27, 2021. http://hdl.handle.net/11244/53080.

MLA Handbook (7^th Edition):

Yang, Mu. “Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations.” 2017. Web. 27 Feb 2021.

Vancouver:

Yang M. Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations. [Internet] [Doctoral dissertation]. University of Oklahoma; 2017. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11244/53080.

Council of Science Editors:

Yang M. Distributed Computation of Graph Spectrum, Eigenvector Centrality, and Solution to Linear Equations. [Doctoral Dissertation]. University of Oklahoma; 2017. Available from: http://hdl.handle.net/11244/53080

University of Limerick

26. Coleman, Joseph. Distributed control system and novel power take off method for pumping-mode airborne wind energy.

Degree: 2014, University of Limerick

URL: http://hdl.handle.net/10344/4424

►

peer-reviewed

The robotic control of tethered parafoils enables a number of exciting applications, primarily a novel approach to wind energy generation. The airborne wind energy… (more)

Subjects/Keywords: airborne wind energy; generator; distributed control system

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APA (6^th Edition):

Coleman, J. (2014). Distributed control system and novel power take off method for pumping-mode airborne wind energy. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/4424

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):

Coleman, Joseph. “Distributed control system and novel power take off method for pumping-mode airborne wind energy.” 2014. Thesis, University of Limerick. Accessed February 27, 2021. http://hdl.handle.net/10344/4424.

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

MLA Handbook (7^th Edition):

Coleman, Joseph. “Distributed control system and novel power take off method for pumping-mode airborne wind energy.” 2014. Web. 27 Feb 2021.

Vancouver:

Coleman J. Distributed control system and novel power take off method for pumping-mode airborne wind energy. [Internet] [Thesis]. University of Limerick; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10344/4424.

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

Council of Science Editors:

Coleman J. Distributed control system and novel power take off method for pumping-mode airborne wind energy. [Thesis]. University of Limerick; 2014. Available from: http://hdl.handle.net/10344/4424

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

University of Illinois – Urbana-Champaign

27. Cady, Stanton. Robust implementation of algorithms for distributed generation control of small-footprint power systems.

Degree: MS, 1200, 2012, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/31965

► Together with advancements in communication and computer processing technologies, the widespread integration of distributed energy resources (DERs) in the form of renewable energy sources, e.g.,… (more)

Subjects/Keywords: Power systems; distributed frequency control; droop controller; microgrid; small-footprint power system; distributed algorithm; distributed generation control

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APA (6^th Edition):

Cady, S. (2012). Robust implementation of algorithms for distributed generation control of small-footprint power systems. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/31965

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):

Cady, Stanton. “Robust implementation of algorithms for distributed generation control of small-footprint power systems.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/31965.

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

MLA Handbook (7^th Edition):

Cady, Stanton. “Robust implementation of algorithms for distributed generation control of small-footprint power systems.” 2012. Web. 27 Feb 2021.

Vancouver:

Cady S. Robust implementation of algorithms for distributed generation control of small-footprint power systems. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/31965.

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

Council of Science Editors:

Cady S. Robust implementation of algorithms for distributed generation control of small-footprint power systems. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/31965

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

University of Lund

28. Mårtensson, Karl. Gradient Methods for Large-Scale and Distributed Linear Quadratic Control.

Degree: 2012, University of Lund

URL: https://lup.lub.lu.se/record/2437129 ; https://portal.research.lu.se/ws/files/4195865/2437131.pdf

► This thesis considers methods for synthesis of linear quadratic controllers for large-scale, interconnected systems. Conventional methods that solve the linear quadratic control problem are only… (more)

▼ This thesis considers methods for synthesis of linear quadratic controllers for large-scale, interconnected systems. Conventional methods that solve the linear quadratic control problem are only applicable to systems with moderate size, due to the rapid increase in both computational time and memory requirements as the system size increases. The methods presented in this thesis show a much slower increase in these requirements when faced with system matrices with a sparse structure. Hence, they are useful for control design for systems of large order, since they usually have sparse systems matrices. An equally important feature of the methods is that the controllers are restricted to have a distributed nature, meaning that they respect a potential interconnection structure of the system. The controllers considered in the thesis have the same structure as the centralized LQG solution, that is, they are consisting of a state predictor and feedback from the estimated states. Strategies for determining the feedback matrix and predictor matrix separately, are suggested. The strategies use gradient directions of the cost function to iteratively approach a locally optimal solution in either problem. A scheme to determine bounds on the degree of suboptimality of the partial solution in every iteration, is presented. It is also shown that these bounds can be combined to give a bound on the degree of suboptimality of the full output feedback controller. Another method that treats the synthesis of the feedback matrix and predictor matrix simultaneously is also presented. The functionality of the developed methods is illustrated by an application, where the methods are used to compute controllers for a large deformable mirror, found in a telescope to compensate for atmospheric disturbances. The model of the mirror is obtained by discretizing a partial differential equation. This gives a linear, sparse representation of the mirror with a very large state space, which is suitable for the methods presented in the thesis. The performance of the controllers is evaluated using performance measures from the adaptive optics community.

Subjects/Keywords: Control Engineering; Large-Scale Control; Distributed Control; Linear Quadratic Gaussian Control; Gradient method; Controller Synthesis

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

APA (6^th Edition):

Mårtensson, K. (2012). Gradient Methods for Large-Scale and Distributed Linear Quadratic Control. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/2437129 ; https://portal.research.lu.se/ws/files/4195865/2437131.pdf

Chicago Manual of Style (16^th Edition):

Mårtensson, Karl. “Gradient Methods for Large-Scale and Distributed Linear Quadratic Control.” 2012. Doctoral Dissertation, University of Lund. Accessed February 27, 2021. https://lup.lub.lu.se/record/2437129 ; https://portal.research.lu.se/ws/files/4195865/2437131.pdf.

MLA Handbook (7^th Edition):

Mårtensson, Karl. “Gradient Methods for Large-Scale and Distributed Linear Quadratic Control.” 2012. Web. 27 Feb 2021.

Vancouver:

Mårtensson K. Gradient Methods for Large-Scale and Distributed Linear Quadratic Control. [Internet] [Doctoral dissertation]. University of Lund; 2012. [cited 2021 Feb 27]. Available from: https://lup.lub.lu.se/record/2437129 ; https://portal.research.lu.se/ws/files/4195865/2437131.pdf.

Council of Science Editors:

Mårtensson K. Gradient Methods for Large-Scale and Distributed Linear Quadratic Control. [Doctoral Dissertation]. University of Lund; 2012. Available from: https://lup.lub.lu.se/record/2437129 ; https://portal.research.lu.se/ws/files/4195865/2437131.pdf

University of Toronto

29. Sniderman, Adam Charles. Synthesizing Structure: Patterned Control of Distributed Systems.

Degree: PhD, 2017, University of Toronto

URL: http://hdl.handle.net/1807/80652

► Nature provides fabulous proofs-of-concept for distributed systems, such as flocks of starlings that perform stunning aerial displays without the direction of a single leader. Autonomous… (more)

Subjects/Keywords: Control theory; Decentralized control; Distributed control; Geometric control; Linear systems; Multiagent systems; 0790

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

APA (6^th Edition):

Sniderman, A. C. (2017). Synthesizing Structure: Patterned Control of Distributed Systems. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/80652

Chicago Manual of Style (16^th Edition):

Sniderman, Adam Charles. “Synthesizing Structure: Patterned Control of Distributed Systems.” 2017. Doctoral Dissertation, University of Toronto. Accessed February 27, 2021. http://hdl.handle.net/1807/80652.

MLA Handbook (7^th Edition):

Sniderman, Adam Charles. “Synthesizing Structure: Patterned Control of Distributed Systems.” 2017. Web. 27 Feb 2021.

Vancouver:

Sniderman AC. Synthesizing Structure: Patterned Control of Distributed Systems. [Internet] [Doctoral dissertation]. University of Toronto; 2017. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1807/80652.

Council of Science Editors:

Sniderman AC. Synthesizing Structure: Patterned Control of Distributed Systems. [Doctoral Dissertation]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/80652

University of California – San Diego

30. Ramirez Llanos, Eduardo Jose. Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization.

Degree: Engineering Sciences (Aerospace Engineering), 2017, University of California – San Diego

URL: http://www.escholarship.org/uc/item/4858r5x4

► The proliferation of large-scale networks like social networks, transportation networks, or smartgrids imposes new demands and challenges on the design of learning algorithms for optimal… (more)

▼ The proliferation of large-scale networks like social networks, transportation networks, or smartgrids imposes new demands and challenges on the design of learning algorithms for optimal resource allocation. In a typical scenario, a group of agents decides how to coordinate the use of shared resources to solve a common goal while satisfying operational and communication constraints. The challenge is how to increase the network resilience given myopic agents with access to partial information. Under these settings, there is an emergence for the design of algorithms that are scalable, robust against adversarial or unknown environments, preserve privacy, and that allow the agents to take autonomous decisions on the resource utilization.A real-world problem leading to such a scenarios arises in computer networks, epidemiology, and viral marketing, where a viral outbreak can be a threat to the security of interconnected infrastructure and the well-being of general population. The implementation of strategies to stop epidemics can be specially challenging when networks are managed by multiple operators who need to preserve the privacy and interests of their constituents.Motivated by this situation, we consider a resource allocation problem for virus spread minimization. Based on a general contagion dynamics model, we characterize the optimal solution to the problem. We pose the problem objective as the minimization of the spectral radius of the contagion-dynamics matrix subject to operational constraints. We propose four algorithms to find the solution with provable convergence guarantees under different settings. The first algorithm, inspired by the Replicator Dynamics, implements the desired resource allocation for time-varying symmetric matrices. The second algorithm, designed in continuous-time, uses local and anonymous interactions, does not require knowledge of the total resource available to agents in order to converge to the solution, is robust to agents joining or departing the network, and to sporadic changes in the network topology, computation errors, and communication faults. The third algorithm, which is a discrete version of the second one, conserves the robustness properties of the previous one. Finally, we propose a stochastic algorithm, which extends the previous algorithms to scenarios where the closed-form expression of the cost functions is unknown to the agents.

Subjects/Keywords: Engineering; Cooperative Control; Distributed optimization; Multi-agent systems; nonlinear control

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

APA (6^th Edition):

Ramirez Llanos, E. J. (2017). Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/4858r5x4

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):

Ramirez Llanos, Eduardo Jose. “Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization.” 2017. Thesis, University of California – San Diego. Accessed February 27, 2021. http://www.escholarship.org/uc/item/4858r5x4.

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

MLA Handbook (7^th Edition):

Ramirez Llanos, Eduardo Jose. “Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization.” 2017. Web. 27 Feb 2021.

Vancouver:

Ramirez Llanos EJ. Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization. [Internet] [Thesis]. University of California – San Diego; 2017. [cited 2021 Feb 27]. Available from: http://www.escholarship.org/uc/item/4858r5x4.

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

Council of Science Editors:

Ramirez Llanos EJ. Distributed Resource Allocation and Optimization Algorithms Applied to Virus Spread Minimization. [Thesis]. University of California – San Diego; 2017. Available from: http://www.escholarship.org/uc/item/4858r5x4

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

Open Access Theses and Dissertations