You searched for subject:(Decentralized control).
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Delft University of Technology
1.
Ledzian, Patrick (author).
Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:ee14c373-7c8b-4079-bec9-0406582b5309 
► Decentralized control and estimation are both active research areas in the field of systems and control. A new approach to these topics utilizes graph theory…
(more)
▼ Decentralized control and estimation are both active research areas in the field of systems and
control. A new approach to these topics utilizes graph theory to characterize inter-agent communication as a graph that, in this thesis, can have time-varying topology. This approach has been named "network-
decentralized" and the use of network-
decentralized control and estimation can enable multi-agent systems to achieve tasks in low information environments. In this thesis a novel network-
decentralized control algorithm is proposed to enable collision avoidance and formation producing behavior in a multi-agent system. Additionally, a network-
decentralized estimation algorithm is also proposed that is combined with the network-
decentralized control approach yielding a first of its kind network-
decentralized network-estimated
control algorithm. A multitude of simulation environments are developed to test the algorithm in a 2-D holonomic multi-agent environment and a parameter tuning method is presented. Strong performance is shown in 2-D with collision avoidance guarantees, at the cost of difficult to tune parameters. The use of holonomic agents in 2-D is consistent with most research in
decentralized control and estimation. Since this type of agent is common, this thesis extends its work to the 3-D non-holonomic agent case in an attempt to help characterize how accurate, scalable, and useful existing
decentralized research is for real world applications. To develop the network-
decentralized algorithm to this point, it is first expanded to the holonomic 3-D case where it is further tested in newly developed simulation environments, where again, collision avoidance guarantees are provided. A novel free-space metric is introduced which allows for tests to be compared across dimensions (eg: 2-D and 3-D) and also yields addition insight as to when parameter-performance breakdown will occur. For the extension of the algorithm to a non-holonomic vehicle in 3-D a suitable quadcopter platform is designed. In addition, the Delft Center for Systems and
Control (DCSC) Distributed Robotics Lab is re-designed and completely virtualized to allow for students to easily access lab resources, such as motion capture (MoCap) information, quadcopter test-code environments, and documentation all in one location. A first-principles based system identification process is presented and used to identify the designed quadcopter platform so that a suitable controller can be found for in-lab use. Two quadcopter simulation environments are developed to allow for the design of hover-envelope controllers based on identified parameters. Since the DCSC department was unable to acquire multiple physical vehicles for swarm testing the system identification process and quadcopter simulation environments are validated against the test results from a single physical quadcopter in the newly designed lab environment. A more comprehensive multi-agent implementation of the collision avoidance portion of the algorithm is tested in a real-time vehicle simulation…
Advisors/Committee Members: Giordano, Giulia (mentor), Verhaegen, Michelle (graduation committee), Shyrokau, Barys (graduation committee), Batselier, Kim (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Network-decentralized; Decentralized Control; Decentralized Estimation; Formation Control; Collision Avoidance; Quadcopter
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APA (6th Edition):
Ledzian, P. (. (2019). Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ee14c373-7c8b-4079-bec9-0406582b5309
Chicago Manual of Style (16th Edition):
Ledzian, Patrick (author). “Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed.” 2019. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:ee14c373-7c8b-4079-bec9-0406582b5309.
MLA Handbook (7th Edition):
Ledzian, Patrick (author). “Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed.” 2019. Web. 18 Jan 2021.
Vancouver:
Ledzian P(. Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:ee14c373-7c8b-4079-bec9-0406582b5309.
Council of Science Editors:
Ledzian P(. Network Decentralized Collision Avoidance with Applications in a Scalable Unmanned Aerial System Testbed. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:ee14c373-7c8b-4079-bec9-0406582b5309
University of Illinois – Urbana-Champaign
2.
Cheng, Albert Z.
Some decentralized optimization and control algorithms for the control of wind farms.
Degree: MS, 0133, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/24125
► This is a preliminary study of decentralized algorithms that can be applied to wind farm controls. Traditionally, wind farm control is comprised of the wind…
(more)
▼ This is a preliminary study of
decentralized algorithms that can be applied to wind
farm controls. Traditionally, wind farm
control is comprised of the wind farm level
control and the wind turbine level
control. The wind farm level
control is a centralized
controller that takes the demands from the grid and generates operating points for each
wind turbine within the wind farm. The wind turbine level
control then generates
the optimal
control for each turbine to match the operating point. Unfortunately, this
traditional
control scheme does not constitute the optimal operation of a wind farm due
to it???s disregard at either level of
control for the interactions between wind turbines in
the wind farm .
Consequently, a different two level
control scheme is proposed in this thesis. This
control scheme is shown to be a
decentralized controller in that each wind turbine has
the ability to both generate its own operating point and calculate its own optimal
control.
Through the communication of the wind turbines with each other, the interactions
between the wind turbines are incorporated into both levels of
control. The generation
of the operating point is posed as a stochastic resource allocation problem that takes
into account the stochastic wind and other wind farm characteristics. We develop a
stochastic algorithm based on network dynamic system theory to solve the resource allocation
problem. We show that the algorithm converges to the solution of the resource
allocation problem almost surely. The calculation of each wind turbine???s optimal
control
is formulated as an Linear Quadratic Regulator (LQR) optimization problem with
a equality constraint. We develop an algorithm that is based on the Tatonnement process
in Economics to solve the LQR problem. We first consider the performance of the
algorithm in a dynamically decoupled system and show that the algorithm solves the
LQR problem. We then consider the performance of the algorithm in a dynamically
coupled system and discuss the difference between the two cases.
Advisors/Committee Members: Langbort, Cedric (advisor).
Subjects/Keywords: Decentralized control; Network control; Wind farm control
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APA (6th Edition):
Cheng, A. Z. (2011). Some decentralized optimization and control algorithms for the control of wind farms. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/24125
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cheng, Albert Z. “Some decentralized optimization and control algorithms for the control of wind farms.” 2011. Thesis, University of Illinois – Urbana-Champaign. Accessed January 18, 2021.
http://hdl.handle.net/2142/24125.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cheng, Albert Z. “Some decentralized optimization and control algorithms for the control of wind farms.” 2011. Web. 18 Jan 2021.
Vancouver:
Cheng AZ. Some decentralized optimization and control algorithms for the control of wind farms. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2142/24125.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cheng AZ. Some decentralized optimization and control algorithms for the control of wind farms. [Thesis]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/24125
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
3.
Johnston, Andrew.
Networked Control Systems with Unbounded Noise under Information Constraints
.
Degree: Mathematics and Statistics, 2012, Queens University
URL: http://hdl.handle.net/1974/7684
► We investigate the stabilization of unstable multidimensional partially observed single-station, multi-sensor (single-controller) and multi-controller (single-sensor) linear systems controlled over discrete noiseless channels under fixed-rate information…
(more)
▼ We investigate the stabilization of unstable multidimensional partially observed single-station, multi-sensor (single-controller) and multi-controller (single-sensor) linear systems controlled over discrete noiseless channels under fixed-rate information constraints. Stability is achieved under communication requirements that are asymptotically tight in the limit of large sampling periods. Through the use of similarity transforms, sampling and random-time drift conditions we obtain a coding and control policy leading to the existence of a unique invariant distribution and finite second moment for the sampled state. We use a vector stabilization scheme in which all modes of the linear system visit a compact set together infinitely often.
Subjects/Keywords: stochastic control
;
quantizers
;
communication constraints
;
decentralized control
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APA (6th Edition):
Johnston, A. (2012). Networked Control Systems with Unbounded Noise under Information Constraints
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/7684
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Johnston, Andrew. “Networked Control Systems with Unbounded Noise under Information Constraints
.” 2012. Thesis, Queens University. Accessed January 18, 2021.
http://hdl.handle.net/1974/7684.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Johnston, Andrew. “Networked Control Systems with Unbounded Noise under Information Constraints
.” 2012. Web. 18 Jan 2021.
Vancouver:
Johnston A. Networked Control Systems with Unbounded Noise under Information Constraints
. [Internet] [Thesis]. Queens University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1974/7684.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Johnston A. Networked Control Systems with Unbounded Noise under Information Constraints
. [Thesis]. Queens University; 2012. Available from: http://hdl.handle.net/1974/7684
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
4.
van Wijk, Daan (author).
Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:b9bb93e5-93c9-40be-b603-7782736b037e
► An often preferred method to control a multi-agent system is by a network-decentralised controller. Network-decentralised means that each agent only has knowledge about its own…
(more)
▼ An often preferred method to control a multi-agent system is by a network-decentralised controller. Network-decentralised means that each agent only has knowledge about its own state and the state of its neighbouring agents. In this thesis the multi-agent system consists of holonomic robots moving in a 2-dimensional configuration space. Each agent is equipped with a collision avoidance algorithm which does not need unmeasurable information from other agents, hence it is completely decentralised. The collision avoidance algorithm gen- erates a reference velocity which is always away and (counter-clockwise) around a possible collision. Cooperation of the agents is reached by estimating their position and moving in an assigned formation by only communicating with neighbouring agents, hence the strategy is network-decentralised. The communication network of the agents is modelled as a graph and described by the associated incidence matrix. This thesis combines for the first time the network-decentralised estimation method proposed by Giordano et al. [1] together with the network-decentralized control method proposed by Blanchini et al. [2] and a collision avoidance algorithm. When anonymity in coordination is possible the agents are able to switch target location. Each agent solves a local optimisation problem to minimise the total distance travelled by itself and its neighbouring agents. The agent with the highest cost sav- ings is allowed to reallocate the target locations. The results obtained in the simulations are very promising and suggest that the proposed algorithms can be successfully implemented to efficiently coordinate agents and avoid collisions in real-world applications.
Systems and Control
Advisors/Committee Members: Giordano, Giulia (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Collision Avoidance; Decentralized Control; Multi-Agent System
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APA (6th Edition):
van Wijk, D. (. (2018). Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b9bb93e5-93c9-40be-b603-7782736b037e
Chicago Manual of Style (16th Edition):
van Wijk, Daan (author). “Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems.” 2018. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:b9bb93e5-93c9-40be-b603-7782736b037e.
MLA Handbook (7th Edition):
van Wijk, Daan (author). “Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems.” 2018. Web. 18 Jan 2021.
Vancouver:
van Wijk D(. Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:b9bb93e5-93c9-40be-b603-7782736b037e.
Council of Science Editors:
van Wijk D(. Network-Decentralized Control with Collision Avoidance for Multi-Agent Systems. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:b9bb93e5-93c9-40be-b603-7782736b037e
Delft University of Technology
5.
van den Bos, Pepijn (author).
Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:dab2f168-2e7f-4126-831d-50bf9c0409f6
► With the decrease in sensor and actuator costs decentralized control strategies have become increasingly attractive, aiming to use multiple simpler robots for achieving a global…
(more)
▼ With the decrease in sensor and actuator costs
decentralized control strategies have become increasingly attractive, aiming to use multiple simpler robots for achieving a global objective. The problem of reaching the global objective generally results in a consensus problem requiring communication amongst the agents. The cooperative manipulation problem, where a payload is manipulated using multiple robots, poses an attractive alternative: By using the payload's motion as the means of communication, the agents can reach consensus without using explicit communication. The advantage being that no additional bandwidth is required as the number of participating agents increases and all to all communication is effectively achieved. Whereas previous works considered only the translation dynamics this thesis work considers the use of the full rigid body motion as a means of communication, such that the agents reach consensus on the desired wrench and the payload is stabilized at any desired configuration. As a possible application the towing of a payload by multiple UAV via cables is considered. This brings the additional challenge of underactuation from the perspective of each agent, since only forces can be used to
control the full payload's motion. The result is a
decentralized nonlinear
control law for the forces applied to a payload such that consensus is reached amongst the agents, the leader's
control action is amplified and the payload is stabilized at any desired configuration. Proofs are constructed via Lyapunov arguments and the applicability of the
control design to the aerial towing problem is validated in simulation.
Advisors/Committee Members: Keviczky, Tamas (mentor), Vallery, Heike (mentor), Proskurnikov, Anton (mentor), Alonso Mora, Javier (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: decentralized control; aerial towing; cooperative manipulation
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APA (6th Edition):
van den Bos, P. (. (2018). Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:dab2f168-2e7f-4126-831d-50bf9c0409f6
Chicago Manual of Style (16th Edition):
van den Bos, Pepijn (author). “Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem.” 2018. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:dab2f168-2e7f-4126-831d-50bf9c0409f6.
MLA Handbook (7th Edition):
van den Bos, Pepijn (author). “Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem.” 2018. Web. 18 Jan 2021.
Vancouver:
van den Bos P(. Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:dab2f168-2e7f-4126-831d-50bf9c0409f6.
Council of Science Editors:
van den Bos P(. Decentralized cooperative manipulation and consensus through object sensing: Applied to the aerial towing problem. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:dab2f168-2e7f-4126-831d-50bf9c0409f6
Delft University of Technology
6.
Li, Xiajing (author).
Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:acdbeb2e-b442-4d26-abef-b81f0a90fd7e
► Multi-Agent Systems, often referred to a network of loosely connected autonomous units, are widely used to model the dynamics of crowds, vehicles, robots and swarms…
(more)
▼ Multi-Agent Systems, often referred to a network of loosely connected autonomous units, are widely used to model the dynamics of crowds, vehicles, robots and swarms in traffic management, biological environment, distributed control and communication technologies. Recently, the study of multi-agent systems is rapidly growing due to the beneficial advantages of using a team of agents in logistics, mapping, search and rescue, etc. In this thesis, we focus on the problem of decentralized collision avoidance among multiple intelligent moving agents. Imaging each agent to be a human, a moving car, or an aircraft, it is supposed to make its decision independently based on its perception of the local environment through sensors only. Two different collision avoidance protocols are presented to generate updated reference velocity continuously for each agent that leads to no future collision. The first method, the rotation based method, is adopted by a geometric based algorithm introduced for 2-Dimensional space and the second method, the potential fields based method, could be categorized as an example of Harmonic Potential Fields (HPF) discussed by Masoud. Both methods employing position information of obstacles result in collision-free paths for each agent under the assumption that all other agents following similar maneuvers. Through simulations in MATLAB, satisfied performances are achieved for method 2 in all challenging scenarios we set while method 1 faced some difficulties dealing with multi-obstacle simultaneously as well as 3D scenarios.
Systems and Control
Advisors/Committee Members: Giordano, Giulia (mentor), Keviczky, Tamas (graduation committee), Ferrari, Riccardo (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Collision Avoidance; Multi-Agent System; Decentralized Control
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Manager
APA (6th Edition):
Li, X. (. (2019). Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:acdbeb2e-b442-4d26-abef-b81f0a90fd7e
Chicago Manual of Style (16th Edition):
Li, Xiajing (author). “Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space.” 2019. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:acdbeb2e-b442-4d26-abef-b81f0a90fd7e.
MLA Handbook (7th Edition):
Li, Xiajing (author). “Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space.” 2019. Web. 18 Jan 2021.
Vancouver:
Li X(. Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:acdbeb2e-b442-4d26-abef-b81f0a90fd7e.
Council of Science Editors:
Li X(. Decentralized Collision Avoidance of Multi-Agent Systems in 3-Dimensional Space. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:acdbeb2e-b442-4d26-abef-b81f0a90fd7e
University of Illinois – Urbana-Champaign
7.
Aquino-Lugo, Angel A.
Distributed and decentralized control of the power grid.
Degree: PhD, 1200, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/18430
► The introduction of remotely controlled network devices is transforming the way the power system is operated and studied. The ability to provide real and reactive…
(more)
▼ The introduction of remotely controlled network devices is transforming the way the power system is operated and studied. The ability to provide real and reactive power support can be achieved at the end-user level. In this dissertation, a framework and algorithm to coordinate this type of end-user
control are presented. The algorithm is based on a layered architecture that would follow a chain of command from the top layer (transmission grid) to the bottom layer (distribution grid). At the distribution grid layer, certain local problems can be solved without the intervention of the top layers. A reactive load
control optimization algorithm to improve the voltage profile in the distribution grid is presented. The framework integrates agent-based technologies to manage the data and
control actions required to operate this type of architecture.
In the distribution network, action can be initiated locally to find solutions to certain problems. That is the reason that in this dissertation
decentralized optimization problems are studied to find a solution to
control reactive power resources. Four
decentralized optimization techniques are studied in two different distribution networks. From the analysis, the Lagrangian relaxation algorithms show the best results to implement a
decentralized scheme to
control reactive resources. Since capacitors are another reactive power resource to be controlled, the dissertation also presents a
decentralized optimization algorithm to minimize losses in the distribution network. The
decentralized algorithm results are found to be similar to those using a centralized algorithm.
Finally, because the
decentralized optimization algorithm needs to iterate among regions to find a solution, another algorithm is introduced to find a local solution to reactive resource problems in the distribution network. The algorithm is based on sensitivities of voltages to reactive resources to estimate the top of a feeder bus voltage of a particular region inside the distribution network. The algorithm is shown to effectively find a solution to a local problem, and the results are similar to a centralized optimization problem.
The framework and the algorithms presented in this dissertation integrate agent-based technologies to manage the data and
control actions required to operate this type of architecture.
Advisors/Committee Members: Overbye, Thomas J. (advisor), Overbye, Thomas J. (Committee Chair), Sauer, Peter W. (committee member), Dom??nguez-Garc??a, Alejandro D. (committee member), Nicol, David M. (committee member), Klump, Raymond P. (committee member).
Subjects/Keywords: distribution network; control; smart grid; agents; decentralized
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APA (6th Edition):
Aquino-Lugo, A. A. (2011). Distributed and decentralized control of the power grid. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18430
Chicago Manual of Style (16th Edition):
Aquino-Lugo, Angel A. “Distributed and decentralized control of the power grid.” 2011. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed January 18, 2021.
http://hdl.handle.net/2142/18430.
MLA Handbook (7th Edition):
Aquino-Lugo, Angel A. “Distributed and decentralized control of the power grid.” 2011. Web. 18 Jan 2021.
Vancouver:
Aquino-Lugo AA. Distributed and decentralized control of the power grid. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2142/18430.
Council of Science Editors:
Aquino-Lugo AA. Distributed and decentralized control of the power grid. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18430
University of Illinois – Urbana-Champaign
8.
Li, Yichuan.
Decentralized model predictive control of urban drainage systems.
Degree: MS, Mechanical Engineering, 2018, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/101712
► This thesis applies a modeling method proposed by previous literature to a specific example and develops control techniques based on this model. The inherent nonlinear…
(more)
▼ This thesis applies a modeling method proposed by previous literature to a specific example and develops
control techniques based on this model. The inherent nonlinear behaviors of the drainage systems were accommodated by introducing binary variables and linear inequalities to merge different modes of operation into a single expression. The objective function is constituted by 3 cost functions considering several priorities. Except the normal objective of minimizing overflows, we present two methods of reducing operation costs by harvesting rain power and energy from rainfall collecting locales. Pressure forebay regulates water with large potential energy and generates electricity as the water is directed through hydraulic pumps. Surface aqueduct collects water with high kinetic energy and pushes water through spiral case to generate electricity. Locations with these devices installed induce lower operation cost and thus have higher priorities to be utilized. Once we formulate the water management problem as an optimization problem with specified constraints, we can apply Model Predictive
Control (MPC) to compensate for modeling errors and prediction inaccuracies. As we regularly update system states and disturbances information, we achieve our goal of applying real time
control to drainage systems.
As the system size grows, the system is partitioned into several subsections and each one of them forms a subsystem which makes local decisions based on partial information. The performance of different partition schemes was compared against centralized MPC and open loop controllers. It was shown that even
decentralized controllers may suffer performance loss, the computation time was significantly reduced compared with centralized controllers. In rain scenarios with large intensity, the performance loss of
decentralized controllers is insignificant compared with the advantage gained by computation time reduced.
Advisors/Committee Members: Voulgaris, Petros (advisor), Stipanovic, Dusan (advisor).
Subjects/Keywords: Decentralized Model Predictive Control. Drainage systems
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APA (6th Edition):
Li, Y. (2018). Decentralized model predictive control of urban drainage systems. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/101712
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Yichuan. “Decentralized model predictive control of urban drainage systems.” 2018. Thesis, University of Illinois – Urbana-Champaign. Accessed January 18, 2021.
http://hdl.handle.net/2142/101712.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Yichuan. “Decentralized model predictive control of urban drainage systems.” 2018. Web. 18 Jan 2021.
Vancouver:
Li Y. Decentralized model predictive control of urban drainage systems. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2142/101712.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li Y. Decentralized model predictive control of urban drainage systems. [Thesis]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/101712
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Connecticut
9.
Bacon, Mark.
Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications.
Degree: MS, Mechanical Engineering, 2011, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/33
► This thesis presents a methodology to bring controlled agents within a moving region despite agent interaction dynamics, uncertain forces and parameter variation. The logic…
(more)
▼ This thesis presents a methodology to bring controlled agents within a moving region despite agent interaction dynamics, uncertain forces and parameter variation. The logic is derived from traditional Sliding Mode
Control theory with an expanded boundary layer which allows position deviation from the region center to specified bounds. As an example of the utility of this
control, multiple methods of herding (controlling passive agents by appropriate positioning of controlled agents) are presented.
Advisors/Committee Members: Jiong Tang, Horea Ilies, Chengyu Cao, Nejat Olgac.
Subjects/Keywords: Multi-Agent; Sliding Mode Control; Decentralized Control; Robust Control
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APA (6th Edition):
Bacon, M. (2011). Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/33
Chicago Manual of Style (16th Edition):
Bacon, Mark. “Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications.” 2011. Masters Thesis, University of Connecticut. Accessed January 18, 2021.
https://opencommons.uconn.edu/gs_theses/33.
MLA Handbook (7th Edition):
Bacon, Mark. “Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications.” 2011. Web. 18 Jan 2021.
Vancouver:
Bacon M. Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications. [Internet] [Masters thesis]. University of Connecticut; 2011. [cited 2021 Jan 18].
Available from: https://opencommons.uconn.edu/gs_theses/33.
Council of Science Editors:
Bacon M. Robust Region Tracking in Multi-Agent Systems Utilizing Sliding Mode Control: Theory and Applications. [Masters Thesis]. University of Connecticut; 2011. Available from: https://opencommons.uconn.edu/gs_theses/33
Delft University of Technology
10.
Tol, Dennis (author).
An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:75ed0b13-0fa4-415b-9fd5-ae5c4d549527
► A hierarchical bi-level model predictive controller is proposed in this thesis to reduce the computational complexity of controlling a large scale air traffic control problem,…
(more)
▼ A hierarchical bi-level model predictive controller is proposed in this thesis to reduce the computational complexity of controlling a large scale air traffic control problem, using a model predictive control approach. The bi-level controller developed and tested in this research project is a combination of a global, long-term, slow-rate, centralized model predictive controller and a local, short-term, fast-rate decentralized model predictive controller that aims to cooperatively guide aircraft towards their destination while avoiding forbidden areas. The bi-level controller is compared to both single-level controllers it is contrived to explore the benefits achieved by the cooperation of the individual controllers, in the context of an air traffic control application. An accurate baseline model predictive controller is used to compare the computational efficiency advantage gained when using the bi-level control structure. The bi-level controller proves to attain a superior control performance over both its contributing parts. The bilevel controller provides a more accurate control performance than the single global centralized controller and performs better in trajectory optimization than the local decentralized controller. Furthermore, the controller performance of the accurate baseline controller can be approached with the bi-level controller at a reduced computation time.
Aerospace Engineering
Advisors/Committee Members: Jamshidnejad, Anahita (mentor), Hoekstra, Jacco (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: MPC; model predictive control; Air Traffic Control; hierarchical control; centralized control; Decentralized Control; bi-level
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Manager
APA (6th Edition):
Tol, D. (. (2020). An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:75ed0b13-0fa4-415b-9fd5-ae5c4d549527
Chicago Manual of Style (16th Edition):
Tol, Dennis (author). “An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications.” 2020. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:75ed0b13-0fa4-415b-9fd5-ae5c4d549527.
MLA Handbook (7th Edition):
Tol, Dennis (author). “An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications.” 2020. Web. 18 Jan 2021.
Vancouver:
Tol D(. An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:75ed0b13-0fa4-415b-9fd5-ae5c4d549527.
Council of Science Editors:
Tol D(. An Exploration of Integrated Bi-level Local and Global Model Predictive Control for Air Traffic Control Applications. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:75ed0b13-0fa4-415b-9fd5-ae5c4d549527
Carnegie Mellon University
11.
Ippolito, Corey A.
Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems.
Degree: 2016, Carnegie Mellon University
URL: http://repository.cmu.edu/dissertations/740
► There is an emerging need to develop new techniques for control system design that better address the challenges posed by modern large-scale cyber-physical systems. These…
(more)
▼ There is an emerging need to develop new techniques for control system design that better address the challenges posed by modern large-scale cyber-physical systems. These systems are often massive networks of interconnected and interoperating subsystems that fuse physical processes, embedded computation, automation technologies, and communication. The resulting problems are dimensionally large, exhibit significant time-varying structural variations during operation, and feature complex dynamics, constraints and objectives across local and global-system scales. These properties are difficult to address using traditional control theoretic methods without substantial loss of performance and robustness. To overcome these limitations, this dissertation presents new concepts and methods for control of modern large-scale variably-structured systems through self-assembling and self-configuring control constructs that allow for fundamental restructuring of the control system’s topology in response to the current system structure. We present the System Component Graph (SCG) formulation as a mathematical framework that generalizes and extends directed graph methods from decentralized control. We present algorithms, methods, and metrics for real-time decentralization and control-structure optimization, utilizing the inclusion principle for addressing interconnected overlapping dynamics and optimal linear-quadratic (LQ) methods for local decentralized subsystem control. Global system control and performance is achieved through a centralized planner that provides continuous real-time optimized trajectories as guidance command inputs to each subsystem. We present the method of Random Subcomplement Trees (RST) for pseudo-optimal real-time trajectory planning of large-scale systems which formalizes and extends the method of rapidly-exploring random trees in a control optimization framework. The RST method defines transformations from the higher-dimension state space into an intermediate lower-dimensional search space, where optimal transitions between subspace states are defined. In the context of this approach, the resulting decentralized topology found within the SCG framework provides the RST subspace definition and requisite transformations, and optimal transitions in the search space are found through forward evaluation of the closed-loop decentralized subsystem dynamics. The methods developed in this thesis are applied to a set of real-world problems spanning various domains and demonstrate the application of these methods from first-principle modeling through control system analysis, design, implementation, and evaluation in experimental tests and simulation.
Subjects/Keywords: decentralized control; graph theory; Large-scale systems; optimal control
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APA (6th Edition):
Ippolito, C. A. (2016). Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems. (Thesis). Carnegie Mellon University. Retrieved from http://repository.cmu.edu/dissertations/740
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ippolito, Corey A. “Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems.” 2016. Thesis, Carnegie Mellon University. Accessed January 18, 2021.
http://repository.cmu.edu/dissertations/740.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ippolito, Corey A. “Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems.” 2016. Web. 18 Jan 2021.
Vancouver:
Ippolito CA. Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems. [Internet] [Thesis]. Carnegie Mellon University; 2016. [cited 2021 Jan 18].
Available from: http://repository.cmu.edu/dissertations/740.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ippolito CA. Self-Assembling Decentralized Control Constructs for Large-Scale Variably-Interconnected Systems. [Thesis]. Carnegie Mellon University; 2016. Available from: http://repository.cmu.edu/dissertations/740
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cornell University
12.
Lin, Weixuan.
Decentralized Control of Constrained Linear Systems via Convex Optimization Methods.
Degree: PhD, Electrical and Computer Engineering, 2020, Cornell University
URL: http://hdl.handle.net/1813/70354
► Decentralized control problems naturally arise in the control of large-scale networked systems. Such systems are regulated by a collection of local controllers in a decentralized…
(more)
▼ Decentralized control problems naturally arise in the
control of large-scale networked systems. Such systems are regulated by a collection of local controllers in a
decentralized manner, in the sense that each local controller is required to specify its
control input based on its locally accessible sensor measurements. In this dissertation, we consider the
decentralized control of discrete-time, linear systems
subject to exogenous disturbances and polyhedral constraints on the state and input trajectories. The underlying system is composed of a finite collection of dynamically coupled subsystems, each of which is assumed to have a dedicated local controller. The decentralization of information is expressed according to sparsity constraints on the sensor measurements that each local controller has access to. In its most general form, the
decentralized control problem amounts to an infinite-dimensional nonconvex program that is, in general, computationally intractable. The primary difficulty of the
decentralized control problem stems from the potential informational coupling between the controllers. Specifically, in problems with nonclassical information structures, the actions taken by one controller can affect the information acquired by other controllers acting on the system. This gives rise to an incentive for controllers to communicate with each other via the actions that they undertake – the so-called signaling incentive. To complicate matters further, there may be hard constraints coupling the actions and local states being regulated by different controllers that must be jointly enforced with limited communication between the local controllers. In this dissertation, we abandon the search for the optimal
decentralized control policy, and resort to approximation methods that enable the tractable calculation of feasible
decentralized control policies. We first provide methods for the tractable calculation of
decentralized control policies that are affinely parameterized in their measurement history. For problems with partially nested information structures, we show that the optimization over such a policy space admits an equivalent reformulation as a semi-infinite convex program. The optimal solution to these semi-inifinite programs can be calculated through the solution of a finite-dimensional conic program. For problems with nonclassical information structures, however, the optimization over such a policy space amounts to a semi-infinite nonconvex program. With the objective of alleviating the nonconvexity in such problems, we propose an approach to
decentralized control design in which the information-coupling states are effectively treated as disturbances whose trajectories are constrained to take values in ellipsoidal ``contract" sets whose location, scale, and orientation are jointly optimized with the affine
decentralized control policy being used to
control the system. The resulting problem is a semidefinite program, whose feasible solutions are guaranteed to be feasible for the original
decentralized…
Advisors/Committee Members: Bitar, Eilyan (chair), Tardos, Eva (committee member), Tang, Ao (committee member), Henderson, Shane (committee member).
Subjects/Keywords: Assume-Guarantee Contracts; Convex Optimization; Decentralized Control; Linear Systems; Robust Control
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APA (6th Edition):
Lin, W. (2020). Decentralized Control of Constrained Linear Systems via Convex Optimization Methods. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/70354
Chicago Manual of Style (16th Edition):
Lin, Weixuan. “Decentralized Control of Constrained Linear Systems via Convex Optimization Methods.” 2020. Doctoral Dissertation, Cornell University. Accessed January 18, 2021.
http://hdl.handle.net/1813/70354.
MLA Handbook (7th Edition):
Lin, Weixuan. “Decentralized Control of Constrained Linear Systems via Convex Optimization Methods.” 2020. Web. 18 Jan 2021.
Vancouver:
Lin W. Decentralized Control of Constrained Linear Systems via Convex Optimization Methods. [Internet] [Doctoral dissertation]. Cornell University; 2020. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1813/70354.
Council of Science Editors:
Lin W. Decentralized Control of Constrained Linear Systems via Convex Optimization Methods. [Doctoral Dissertation]. Cornell University; 2020. Available from: http://hdl.handle.net/1813/70354
Penn State University
13.
Ghosh, Supratim.
Teams and games for distributed consensus.
Degree: 2013, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/18723
► The problem of synthesizing linear dynamic feedback controllers which achieve distributed fi�nite-time consensus for networks of multiple agents described by fi�xed connectivity graphs is considered.…
(more)
▼ The problem of synthesizing linear dynamic feedback controllers which achieve distributed fi�nite-time consensus for networks of multiple agents described by fi�xed connectivity graphs is considered. The techniques of teams and games are employed in synthesizing these controllers. Under the situations where the connectivity graph is known to every agent or to a central authority a priori, the network behaves as a team and the solution procedure involves posing a �finite-horizon
decentralized control problem and converting it to a static convex optimization problem via linear
quadratic team-theoretic notions. The dynamic feedback controller thus synthesized optimizes a
transient performance measure and guarantees consensus within a minimal number of steps.
Extending these results to situations where the networks are described by connectivity graphs
which are not known at the outset to any of the agents or to a central authority, the problem
of optimal distributed consensus is formulated as a
decentralized linear quadratic game where
the agents minimize their own local costs by sequentially learning the network connectivity
and generating local decisions. A distributed protocol based on online optimization and linear
dynamic feedback is shown to achieve an equilibrium with respect to these local costs. For the cases of unknown undirected (bidirectional) graphs the protocol produces an optimal performance with time-optimal �finite-time consensus. The
control protocol is formed by coupling and jointly
optimizing the tasks of network learning and network
control so that the states can be steered to the desired consensus value.
Under unknown general directed graphs a similar distributed
control protocol exhibits a near-optimal fi�nite-time consensus. Several classes of directed graphs for which the controller performs optimally in space and/or in time have been identi�fied. On the other hand, counterexamples show that due to the diffi�culties inherent to dealing with general directed graphs, no
control policy is
uniformly optimal over all directed graphs.
Advisors/Committee Members: Ji Woong Lee, Dissertation Advisor/Co-Advisor, Ji Woong Lee, Committee Chair/Co-Chair, Constantino Manuel Lagoa, Committee Member, Asok Ray, Committee Member, Piotr Berman, Committee Member.
Subjects/Keywords: Cooperative Control; Game Theory; Multi-agent Consensus; Decentralized Control.
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Manager
APA (6th Edition):
Ghosh, S. (2013). Teams and games for distributed consensus. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ghosh, Supratim. “Teams and games for distributed consensus.” 2013. Thesis, Penn State University. Accessed January 18, 2021.
https://submit-etda.libraries.psu.edu/catalog/18723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ghosh, Supratim. “Teams and games for distributed consensus.” 2013. Web. 18 Jan 2021.
Vancouver:
Ghosh S. Teams and games for distributed consensus. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Jan 18].
Available from: https://submit-etda.libraries.psu.edu/catalog/18723.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ghosh S. Teams and games for distributed consensus. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18723
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
14.
Kumar, Naveen (author).
Design and Decentralized Control of Bi-directional Flyback.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:310d540e-169a-45d7-b2c1-57ec2855f839
► A large part of the global population is still living without the access to electricity. The interconnected solar home system (SHS) has been purposed as…
(more)
▼ A large part of the global population is still living without the access to electricity. The interconnected solar home system (SHS) has been purposed as a solution to meet the local demand in the remote areas. In this thesis, a decentralized architecture of SHS is considered which consists of four converters. This work proposed the design of one of the converter (flow converter) and the selection of appropriate control strategy to ensure proper function of the interconnected solar home system. A prototype of flow converter was designed and tested for bi-directional power flow. Power droop is being incorporated in the constant current control scheme. The load sharing and voltage regulation using droop mechanism are also demonstrated.
Electrical Engineering
Advisors/Committee Members: Qin, Zian (mentor), Bauer, Pavol (graduation committee), Rueda Torres, José L. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Bi-directional Flyback; Decentralized Control,; Load sharing; Voltage Regulation; Current Control
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Manager
APA (6th Edition):
Kumar, N. (. (2018). Design and Decentralized Control of Bi-directional Flyback. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:310d540e-169a-45d7-b2c1-57ec2855f839
Chicago Manual of Style (16th Edition):
Kumar, Naveen (author). “Design and Decentralized Control of Bi-directional Flyback.” 2018. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:310d540e-169a-45d7-b2c1-57ec2855f839.
MLA Handbook (7th Edition):
Kumar, Naveen (author). “Design and Decentralized Control of Bi-directional Flyback.” 2018. Web. 18 Jan 2021.
Vancouver:
Kumar N(. Design and Decentralized Control of Bi-directional Flyback. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:310d540e-169a-45d7-b2c1-57ec2855f839.
Council of Science Editors:
Kumar N(. Design and Decentralized Control of Bi-directional Flyback. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:310d540e-169a-45d7-b2c1-57ec2855f839
University of Illinois – Urbana-Champaign
15.
Mishra, Anshuman.
Team decision theory of switched static and dynamic systems.
Degree: PhD, 0133, 2014, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/50711
► This dissertation considers the decentralized control of switched linear systems with parameter dependent cost and system matrices. This problem class is investigated under a number…
(more)
▼ This dissertation considers the
decentralized control of switched linear systems with parameter dependent cost and system matrices. This problem class is investigated under a number of different formulations of player information structure, performance criteria and switching architecture. Such
decentralized switched systems can be encountered in various applications like network
control,
control in a changing environment, economic theory, power systems, decision making in organizations, resource allocation. The thesis is roughly divided into three parts.
The first part of the thesis focuses on the static quadratic team problem, where players observe partial observations of an underlying random state and generate actions with the objective of minimizing the expected value of a common quadratic cost function in the player actions. One of the motivations behind studying this problem is to solve a static stochastic-parameter problem useful in solving dynamic switched
control problems encountered later. The problem however is studied in full generality and an operator theoretic framework is presented to analyze the same. We prove that a scheme where strategies are updated by sequentially applying the best responses of players, converges to the team optimal strategy. Such an update scheme provides a mechanism to numerically compute arbitrarily close approximations of the team optimal strategy. It also acts as a tool for validating structure of the team optimal strategy which can be beneficial in some cases for analytical computation of these strategies.
The second part of the thesis considers dynamic switched optimal
control problems with quadratic cost and players having local parameter knowledge. One of these problems is studied under full state feedback and i.i.d. parameter; the remaining two problems are output feedback, distinguished by the type of information structure: partially nested and one-step delayed sharing. For the former output feedback problem, parameters and measurements follow a partially nested structure with the parameters possibly being correlated across all stages. For the latter case, parameters are assumed to be Markov processes, with their values along with measurements available instantaneously to local controllers, but with a one time step delay to others. The solution to all these problems rely on the optimal solution to a static (one-stage) stochastic-parameter problem with local parameter dependent Gaussian measurements, and for this purpose the static quadratic team problem, examined in first part is used. The strategies obtained in all these dynamic problems are affine in the measurements with the parameter dependent coefficients obtained by solving a set of linear equations. These equations are immediately solvable when the total number of parameter values is finite. However, for the case of infinite parameter values, the update scheme examined in the first section also provides a mechanism to determine an approximation to the team optimal strategy.
In the final part of the thesis,…
Advisors/Committee Members: Dullerud, Geir E. (advisor), Dullerud, Geir E. (Committee Chair), Langbort, Cedric (committee member), Srikant, Rayadurgam (committee member), Mehta, Prashant G. (committee member).
Subjects/Keywords: Team decision theory; Decentralized control; Switched control; Nested systems
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Export
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Manager
APA (6th Edition):
Mishra, A. (2014). Team decision theory of switched static and dynamic systems. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/50711
Chicago Manual of Style (16th Edition):
Mishra, Anshuman. “Team decision theory of switched static and dynamic systems.” 2014. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed January 18, 2021.
http://hdl.handle.net/2142/50711.
MLA Handbook (7th Edition):
Mishra, Anshuman. “Team decision theory of switched static and dynamic systems.” 2014. Web. 18 Jan 2021.
Vancouver:
Mishra A. Team decision theory of switched static and dynamic systems. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2142/50711.
Council of Science Editors:
Mishra A. Team decision theory of switched static and dynamic systems. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/50711
University of Illinois – Urbana-Champaign
16.
Hirzallah, Nabil H K.
Decentralized frequency control of power systems with deep penetration of wind-based generation.
Degree: MS, Electrical & Computer Engineering, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/88976
► The introduction of the highly variable and uncertain renewable resources into the power grid is calling for more control and regulation of the power system…
(more)
▼ The introduction of the highly variable and uncertain renewable resources into the power grid is calling for more
control and regulation of the power system dynamics. In particular, the automatic generation
control, which is responsible for maintaining the nominal system frequency and the scheduled real power interchange, needs to be modified to include unmodeled system dynamics and to account for disturbances from renewable resources. In this thesis, we work on a nonlinear differential algebraic model of the power system which takes into account the effect of the power network and includes wind power injections. We then propose two
decentralized controllers that each would stabilize the system frequency and power interchange. The first controller is based on linear quadratic (LQ) optimal
control followed by an optimization algorithm to increase the sparsity of the feedback gains. The other controller is designed using the theory of overlapping
control and the inclusion principle. Each controller is applied separately on a 3-machine 6-bus 2-wind turbine nonlinear model, and the simulation is carried out using Simulink. A power flow program is run at each automatic generation
control (AGC) cycle to update the power flow variables. Results show that we can design
decentralized controllers for each
control area that can successfully track the desired frequency regardless of the disturbances associated with wind-based generation. Furthermore, we show that the performance of these controllers is comparable to that of a centralized controller.
Advisors/Committee Members: Voulgaris, Petros (advisor).
Subjects/Keywords: wind; automatic generation control (AGC); decentralized; network; control
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APA (6th Edition):
Hirzallah, N. H. K. (2015). Decentralized frequency control of power systems with deep penetration of wind-based generation. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/88976
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hirzallah, Nabil H K. “Decentralized frequency control of power systems with deep penetration of wind-based generation.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed January 18, 2021.
http://hdl.handle.net/2142/88976.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hirzallah, Nabil H K. “Decentralized frequency control of power systems with deep penetration of wind-based generation.” 2015. Web. 18 Jan 2021.
Vancouver:
Hirzallah NHK. Decentralized frequency control of power systems with deep penetration of wind-based generation. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2142/88976.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hirzallah NHK. Decentralized frequency control of power systems with deep penetration of wind-based generation. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/88976
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
17.
Verdoljak, Reuben.
Application of Sparse Feedback Control Strategies to Civil Structures.
Degree: MS, Civil Engineering, 2016, University of Minnesota
URL: http://hdl.handle.net/11299/181824
► Modern structural control systems use centralized, wired sensor feedback to impart counter forces based on measurement of the response. However, centralized systems can be sensitive…
(more)
▼ Modern structural control systems use centralized, wired sensor feedback to impart counter forces based on measurement of the response. However, centralized systems can be sensitive to sensor failure, controller failure, and the reliability of sensor links. The recent study of wireless control systems has encouraged decentralized control approaches to overcome wireless structural control challenges, including limiting the wireless communication required and the associated slow sampling rate and time delays in the control system. Decentralized control offers the additional advantages of multiple independent controllers and small subsets of measurement feedback. Previous decentralized structural control algorithms, both Ad-Hoc and Heuristic, enforce a spatial sparsity pattern during the design, which is assumed it{a priori}. Therefore, the optimal feedback structure is not considered in the design. This work explores a decentralized optimal LQR design algorithm (LQRSP) where the sparsity of the feedback gain is incorporated into the objective function. The control approach is compared to previous decentralized control techniques on 5- and 20-Story control benchmark structures fitted with active or semi-active systems. Additionally, the sparsity and control requirements are compared to centralized designs to gain insight on the overall performance of sparse feedback systems. The LQRSP program and its additional parameters are explored more fully to make informed control decisions, further enhancing the decentralized control design. The optimal sparse feedback design offers the best balance of performance, measurement feedback, and control effort, while clearly highlighting important feedback control measurements. Additionally, the feedback structure identified is not easily identifiable it{a priori} in the reduced order model of the 20-story structure, highlighting the significance of particular measurements in this feedback framework. To bridge the gap between simulation and reality, the LQRSP design is extended to a discrete time simulation system to incorporate wireless transmission time as well as sensor and estimation noise. A 5-Story specimen with semi-active control devices is designed for a uniaxial shake table for future physical testing of various centralized and decentralized control algorithms during seismic excitations.
Subjects/Keywords: Decentralized structural control; feedback gain; optimal sparse control
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APA (6th Edition):
Verdoljak, R. (2016). Application of Sparse Feedback Control Strategies to Civil Structures. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/181824
Chicago Manual of Style (16th Edition):
Verdoljak, Reuben. “Application of Sparse Feedback Control Strategies to Civil Structures.” 2016. Masters Thesis, University of Minnesota. Accessed January 18, 2021.
http://hdl.handle.net/11299/181824.
MLA Handbook (7th Edition):
Verdoljak, Reuben. “Application of Sparse Feedback Control Strategies to Civil Structures.” 2016. Web. 18 Jan 2021.
Vancouver:
Verdoljak R. Application of Sparse Feedback Control Strategies to Civil Structures. [Internet] [Masters thesis]. University of Minnesota; 2016. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/11299/181824.
Council of Science Editors:
Verdoljak R. Application of Sparse Feedback Control Strategies to Civil Structures. [Masters Thesis]. University of Minnesota; 2016. Available from: http://hdl.handle.net/11299/181824
University of North Texas
18.
Sheth, Vardhman Jayeshkumar.
Networking and Decentralized Control in Layered Networks: a Theoretical Study and Test-bed Development.
Degree: 2014, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc700084/
► Layered structures are commonly used in communication systems, but their roles in decentralized control are not understood well. In the first part of this thesis,…
(more)
▼ Layered structures are commonly used in communication systems, but their roles in
decentralized control are not understood well. In the first part of this thesis, a theoretical study of consensus (a typical
decentralized control task) in layered structures is conducted. The unique graph topology approach permits explicit characterization of consensus performance based on simple graphical characteristics of MLMG structures. In the second part of this thesis, a generic LEGO test-bed to mimic multi-domain communication with layered structures is described. A search-and-rescue scenario is implemented to demonstrate the use of the test-bed.
Advisors/Committee Members: Wan, Yan, Li, Xinrong, Fu, Shengli.
Subjects/Keywords: Networking; consensus; decentralized control; Control theory.; Computer networks.; Telecommunication systems.
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University of Maryland
19.
Sabau, Serban.
Optimal Control with Information Pattern Constraints.
Degree: Electrical Engineering, 2011, University of Maryland
URL: http://hdl.handle.net/1903/11971
► Despite the abundance of available literature that starts with the seminal paper of Wang and Davison almost forty years ago, when dealing with the problem…
(more)
▼ Despite the abundance of available literature that starts with the seminal paper of Wang and Davison almost forty years ago, when dealing with the problem of
decentralized control for linear dynamical systems, one faces a surprising lack of
general design methods, implementable via computationally tractable algorithms.
This is mainly due to the fact that for
decentralized control configurations, the classical
control theoretical framework falls short in providing a systematic analysis
of the stabilization problem, let alone cope with additional optimality criteria.
Recently, a significant leap occurred through the theoretical machinery developed in Rotkowitz and Lall, IEEE-TAC, vol. 51, 2006, pp. 274-286 which unifies and consolidates many previous results, pinpoints certain tractable
decentralized control structures, and outlines the most general known class of convex problems in
decentralized control. The
decentralized setting is modeled via the structured sparsity constraints paradigm, which proves to be a simple and effective way to formalize many
decentralized configurations where the controller feature a given sparsity pattern. Rotkowitz and Lall propose a computationally tractable algorithm for the design of H2 optimal,
decentralized controllers for linear and time invariant systems, provided that the plant is strongly stabilizable. The method is built on the assumption that the sparsity constraints imposed on the controller satisfy a certain
condition (named quadratic invariance) with respect to the plant and that some
decentralized, strongly stablizable, stabilizing controller is available beforehand.
For this class of
decentralized feedback configurations modeled via sparsity constraints, so called quadratically invariant, we provided complete solutions to several open problems. Firstly, the strong stabilizability assumption was removed via
the so called coordinate free parametrization of all, sparsity constrained controllers.
Next we have addressed the unsolved problem of stabilizability/stabilization via sparse controllers, using a particular form of the celebrated Youla parametrization.
Finally, a new result related to the optimal disturbance attenuation problem in the presence of stable plant perturbations is presented. This result is also valid for quadratically invariant,
decentralized feedback configurations. Each result provides a computational, numerically tractable algorithm which is meaningful in the
synthesis of sparsity constrained optimal controllers.
Advisors/Committee Members: Martins, Nuno C. (advisor).
Subjects/Keywords: Electrical engineering; Decentralized Control; Linear Systems; Optimal Control
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APA (6th Edition):
Sabau, S. (2011). Optimal Control with Information Pattern Constraints. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/11971
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sabau, Serban. “Optimal Control with Information Pattern Constraints.” 2011. Thesis, University of Maryland. Accessed January 18, 2021.
http://hdl.handle.net/1903/11971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sabau, Serban. “Optimal Control with Information Pattern Constraints.” 2011. Web. 18 Jan 2021.
Vancouver:
Sabau S. Optimal Control with Information Pattern Constraints. [Internet] [Thesis]. University of Maryland; 2011. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1903/11971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sabau S. Optimal Control with Information Pattern Constraints. [Thesis]. University of Maryland; 2011. Available from: http://hdl.handle.net/1903/11971
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
20.
Hioe, Denny.
Dissipativity-based analysis and control of nonlinear process networks.
Degree: Chemical Sciences & Engineering, 2013, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53063
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11741/SOURCE01?view=true
► This thesis presents a number of new developments on decentralized analysis and control design of process networks - defined in this thesis as the interconnections…
(more)
▼ This thesis presents a number of new developments on
decentralized analysis and
control design of process networks - defined in this thesis as the interconnections of chemical process systems and their controllers - based on the theory of dissipative systems. In the proposed approach, each subsystem of a network is viewed as an input-output mathematical operator that can be dynamic and nonlinear depending on the physics ofeach process system and the configuration of its controllers. Each operator is further characterized by a dissipativity property that describes the behavioural constraints between its input and output. Quadratic dissipativity properties are particularly studied in this thesis to facilitate scalable applications to large-scale networks. Based on the dissipativity property of subsystems and the network topology, the overall dynamic performance of the network (in terms of H-infinity gain) can be determined using simple algebra. In this thesis, the use of physics (thermodynamics), geometric nonlinear techniques, and optimal
control theory are investigated to characterize the dissipativity property of open-loop and closed-loop subsystems. All the above developments, which depend on the classical theory of dissipative systems, are sensitive to the equilibrium values of systems. Therefore, prior to the proposed study, a centralized steady-state analysis has to be completed to obtain this particular information. It also follows that if there are changes to the equilibrium values, both the centralized and dissipativity-based studies will have to be redone. In this view, the concept of incremental dissipativity is introduced to potentially enable free-equilibrium dissipativity-based study so that the analysis and
control design tasks can be further
decentralized (i.e., such that they can be completed with less centralized information). Each development in this thesis is illustrated using a simple network example.
Advisors/Committee Members: Bao, Jie, Chemical Sciences & Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Decentralized control; Dissipative systems; Process control; Large-scale systems; Network
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APA (6th Edition):
Hioe, D. (2013). Dissipativity-based analysis and control of nonlinear process networks. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53063 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11741/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Hioe, Denny. “Dissipativity-based analysis and control of nonlinear process networks.” 2013. Doctoral Dissertation, University of New South Wales. Accessed January 18, 2021.
http://handle.unsw.edu.au/1959.4/53063 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11741/SOURCE01?view=true.
MLA Handbook (7th Edition):
Hioe, Denny. “Dissipativity-based analysis and control of nonlinear process networks.” 2013. Web. 18 Jan 2021.
Vancouver:
Hioe D. Dissipativity-based analysis and control of nonlinear process networks. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2021 Jan 18].
Available from: http://handle.unsw.edu.au/1959.4/53063 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11741/SOURCE01?view=true.
Council of Science Editors:
Hioe D. Dissipativity-based analysis and control of nonlinear process networks. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53063 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11741/SOURCE01?view=true
University of New South Wales
21.
Ahmad, Waqqas.
Decentralized control of mobile robotic sensor network.
Degree: Electrical Engineering & Telecommunications, 2012, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/51774
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10441/SOURCE02?view=true
► The self deployment of a decentralized mobile sensor network has been addressed in this thesis. The mobile robotic sensors are self deployed in the form…
(more)
▼ The self deployment of a
decentralized mobile sensor network has been addressed in this thesis. The mobile robotic sensors are self deployed in the form of a blanket over a bounded and connected unknown two dimensional region. The main objective is to fully track and to cover the arbitrary unknown region (meeting assumptions) with minimum number of mobile robotic sensors moving under
decentralized control. The issue of connectivity has also been considered during final deployment of mobile robotic sensors. An algorithm with
decentralized control law has been developed to self deploy the mobile robotic sensors into a triangular lattice pattern ensuring optimization. The optimization of deployment in terms of minimum number of sensors ensuring 1-coverage and 6-connectivity (wherever possible) has been considered during final deployment of mobile robotic sensors over the unknown region. A special consideration in continuation to the past work has been taken in order to remove the redundant placement of mobile robotic sensors on the boundary of the region and to fully track all the segments of the boundary of the region. The
control action for velocity and heading of mobile robotic sensors is based on simple nearest neighbourhood rules derived from swarm intelligence. The algorithm also uses the concept of stable quotient system of the
decentralized control system during line forming mode inside the region. A number of numerical simulations while changing the arbitrary region have been done in order to validate the
control algorithm. As compared to the past work, the boundary moving mobile robotic sensors fully explore every segment of the boundary of the unknown region, and redundantly placed mobile robotic sensor on each of the line forming mode inside the region has been removed.
Advisors/Committee Members: Savkin, Andrey V., Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.
Subjects/Keywords: Mobile Robotic Sensor Network; Decentralized Control; Distributed and Localized Control
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APA (6th Edition):
Ahmad, W. (2012). Decentralized control of mobile robotic sensor network. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/51774 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10441/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Ahmad, Waqqas. “Decentralized control of mobile robotic sensor network.” 2012. Masters Thesis, University of New South Wales. Accessed January 18, 2021.
http://handle.unsw.edu.au/1959.4/51774 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10441/SOURCE02?view=true.
MLA Handbook (7th Edition):
Ahmad, Waqqas. “Decentralized control of mobile robotic sensor network.” 2012. Web. 18 Jan 2021.
Vancouver:
Ahmad W. Decentralized control of mobile robotic sensor network. [Internet] [Masters thesis]. University of New South Wales; 2012. [cited 2021 Jan 18].
Available from: http://handle.unsw.edu.au/1959.4/51774 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10441/SOURCE02?view=true.
Council of Science Editors:
Ahmad W. Decentralized control of mobile robotic sensor network. [Masters Thesis]. University of New South Wales; 2012. Available from: http://handle.unsw.edu.au/1959.4/51774 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10441/SOURCE02?view=true
University of Toronto
22.
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)
▼ 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 engineering systems (such as groups of robots) are often architected in the same fashion, with a
control action split among several independent parts rather than being centralized. In these instances, a system's parts interact with a distinct interconnection structure - a pattern - that must be adhered to by the system's controller. This thesis explores a method for preserving patterns in
control design: for several common
control problems, we show how to check whether a pattern-preserving controller exists, and we provide a method by which to find one. To do so, we encode patterns through algebraic commuting relationships, and we carry those commuting relationships through the standard controller design steps of system decomposition and feedback synthesis (among others). We also discover how these patterns alter a systemâ s basic properties such as controllability and observability. Our results apply in a variety of fields, ranging from formation flying to distributed power generation and from coupled chemical tanks to self-driving cars. Though we take our initial cues from nature, we hope that our work is not just "for the birds".
Advisors/Committee Members: D'Eleuterio, Gabriele M T, Broucke, Mireille E, Aerospace Science and Engineering.
Subjects/Keywords: Control theory; Decentralized control; Distributed control; Geometric control; Linear systems; Multiagent systems; 0790
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APA (6th 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 (16th Edition):
Sniderman, Adam Charles. “Synthesizing Structure: Patterned Control of Distributed Systems.” 2017. Doctoral Dissertation, University of Toronto. Accessed January 18, 2021.
http://hdl.handle.net/1807/80652.
MLA Handbook (7th Edition):
Sniderman, Adam Charles. “Synthesizing Structure: Patterned Control of Distributed Systems.” 2017. Web. 18 Jan 2021.
Vancouver:
Sniderman AC. Synthesizing Structure: Patterned Control of Distributed Systems. [Internet] [Doctoral dissertation]. University of Toronto; 2017. [cited 2021 Jan 18].
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 Lund
23.
Bergeling, Carolina.
On H-infinity Control and Large-Scale Systems.
Degree: 2019, University of Lund
URL: https://lup.lub.lu.se/record/5f06f32c-95e8-4742-a8cc-fe560717edc6
;
https://portal.research.lu.se/ws/files/63879983/CarolinaBergelingPhDThesisExcludedNonPublishedPapers.pdf
► In this thesis, a class of linear time-invariant systems is identified for which a particular type of H-infinity optimal control problem can be solved explicitly.…
(more)
▼ In this thesis, a class of linear time-invariant
systems is identified for which a particular type of H-infinity
optimal control problem can be solved explicitly. It follows that
the synthesized controller can be given on a simple explicit form.
More specifically, the controller can be written in terms of the
matrices of the system’s state-space representation. The result has
applications in the control of large-scale systems, as well as for
the control of infinite-dimensional systems, with certain
properties. For the large-scale applications considered, the
controller is both globally optimal as well as possesses a
structure compatible with the information-structure of the system.
This decentralized property of the controller is obtained without
any structural constraints or regularization techniques being part
of the synthesis procedure. Instead, it is a result of its
particular form. Examples of applications are electrical networks,
temperature dynamics in buildings and water irrigation systems.In
the infinite-dimensional case, the explicitly stated controller
solves the infinite-dimensional H-infinity synthesis problem
directly without the need of approximation techniques. An important
application is diffusion equations. Moreover, the presented results
can be used for evaluation and benchmarking of general purpose
algorithms for H-infinity control.The systems considered in this
thesis are shown to belong to a larger class of systems for which
the H-infinity optimal control problem can be translated into a
static problem at a single frequency. In certain cases, the static
problem can be solved through a simple least-squares argument. This
procedure is what renders the simple and explicit expression of the
controller previously described. Moreover, the given approach is in
contrast to conventional methods to the problem of H-infinity
control, as they are in general performed
numerically.
Subjects/Keywords: Control Engineering; H-infinity Control; Decentralized Control; Large-Scale Systems; Infinite-Dimensional Systems
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APA (6th Edition):
Bergeling, C. (2019). On H-infinity Control and Large-Scale Systems. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/5f06f32c-95e8-4742-a8cc-fe560717edc6 ; https://portal.research.lu.se/ws/files/63879983/CarolinaBergelingPhDThesisExcludedNonPublishedPapers.pdf
Chicago Manual of Style (16th Edition):
Bergeling, Carolina. “On H-infinity Control and Large-Scale Systems.” 2019. Doctoral Dissertation, University of Lund. Accessed January 18, 2021.
https://lup.lub.lu.se/record/5f06f32c-95e8-4742-a8cc-fe560717edc6 ; https://portal.research.lu.se/ws/files/63879983/CarolinaBergelingPhDThesisExcludedNonPublishedPapers.pdf.
MLA Handbook (7th Edition):
Bergeling, Carolina. “On H-infinity Control and Large-Scale Systems.” 2019. Web. 18 Jan 2021.
Vancouver:
Bergeling C. On H-infinity Control and Large-Scale Systems. [Internet] [Doctoral dissertation]. University of Lund; 2019. [cited 2021 Jan 18].
Available from: https://lup.lub.lu.se/record/5f06f32c-95e8-4742-a8cc-fe560717edc6 ; https://portal.research.lu.se/ws/files/63879983/CarolinaBergelingPhDThesisExcludedNonPublishedPapers.pdf.
Council of Science Editors:
Bergeling C. On H-infinity Control and Large-Scale Systems. [Doctoral Dissertation]. University of Lund; 2019. Available from: https://lup.lub.lu.se/record/5f06f32c-95e8-4742-a8cc-fe560717edc6 ; https://portal.research.lu.se/ws/files/63879983/CarolinaBergelingPhDThesisExcludedNonPublishedPapers.pdf
University of Michigan
24.
Ouyang, Yi.
On the Interaction of Information and Decisions in Dynamic Networked Systems.
Degree: PhD, Electrical Engineering: Systems, 2016, University of Michigan
URL: http://hdl.handle.net/2027.42/120820
► Efficient operation of modern dynamic networked systems, such as communication systems, queueing networks, power systems, and surveillance systems, can significantly improve our quality of life.…
(more)
▼ Efficient operation of modern dynamic networked systems, such as communication systems, queueing networks, power systems, and surveillance systems, can significantly improve our quality of life. The operation of a dynamic networked system involves series of decision making processes by many decision makers (DMs) who may or may not have the same information, and may or may not share the same objective.
The quality of each DM's decision depends on the quality of the information available for decision-making in the network. Since the network is dynamic, the information available to the DMs over time is a dynamic process that depends on the DMs' decision rules. Information affects decisions, and decisions influence information. This interaction between information and decisions in dynamic networks results in complex decision-making problems.
In this thesis, we study the impact of the information-decision interaction on system performance within the context of: (i) centralized stochastic
control; (ii)
decentralized stochastic
control; and (iii) game theory. Specifically, within the context of centralized stochastic
control, we study a multi-state channel sensing problem, and discover sets of conditions sufficient to guarantee the optimality of a myopic policy. Within the context of
decentralized stochastic
control, we consider a
decentralized routing problem as well as a multiple access communication problem; we discover an optimal
decentralized routing policy for the routing problem, and an efficient
decentralized multiple access protocol. Within the context of game theory, we study a general model of dynamic stochastic games with asymmetric information; we introduce the concept of common information based perfect Bayesian equilibrium (CIB-PBE), and provide a sequential decomposition for the dynamic games that leads to an algorithm to determine CIB-PBE.
Advisors/Committee Members: Teneketzis, Demosthenis (committee member), Van Oyen, Mark Peter (committee member), Liu, Mingyan (committee member), Basar, Tamer (committee member), Nayyar, Ashutosh (committee member).
Subjects/Keywords: Stochastic control; Dynamic games; Decentralized information; Electrical Engineering; Engineering
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APA ·
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Export
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Manager
APA (6th Edition):
Ouyang, Y. (2016). On the Interaction of Information and Decisions in Dynamic Networked Systems. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/120820
Chicago Manual of Style (16th Edition):
Ouyang, Yi. “On the Interaction of Information and Decisions in Dynamic Networked Systems.” 2016. Doctoral Dissertation, University of Michigan. Accessed January 18, 2021.
http://hdl.handle.net/2027.42/120820.
MLA Handbook (7th Edition):
Ouyang, Yi. “On the Interaction of Information and Decisions in Dynamic Networked Systems.” 2016. Web. 18 Jan 2021.
Vancouver:
Ouyang Y. On the Interaction of Information and Decisions in Dynamic Networked Systems. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2027.42/120820.
Council of Science Editors:
Ouyang Y. On the Interaction of Information and Decisions in Dynamic Networked Systems. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/120820
25.
Jamsrandorj, Tom 1983-.
DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN.
Degree: 2017, University of Saskatchewan
URL: http://hdl.handle.net/10388/8087
► To effectively participate in modern collaborations, member organizations should be able to share digital resources with various partners, while ensuring their digital resources are protected…
(more)
▼ To effectively participate in modern collaborations, member organizations should be able to share digital resources with various partners, while ensuring their digital resources are protected from inappropriate access. In the existing literature, a substantial amount of research on centralized access
control in the context of a single organization has been carried out. However, research on
decentralized access
control in a collaborative environment is scarce. To advance research in this area, I implemented a prototype of a
decentralized access
control system, which supports transparency, auditability, immutability, and equality in a collaboration environment, using the Multichain blockchain platform, RESTful web services, and Java programming language. The prototype was developed to evaluate two primary metrics: average response time and throughput. To achieve this, I carried out a number of experiments to measure both metrics on a Local Area Network (LAN) and on Amazon Web Services (AWS) under 84 different experimental conditions. The LAN setup provides a baseline for system performance under optimal conditions, while the cloud infrastructure represents a real-world use case. With low-system loads (comprising one to thirty concurrent clients and a single server running the system), the LAN setup outperformed the AWS setup by a factor of 2.5 based on throughput. On the other hand, when the system load is significantly increased, with more servers running the system, the AWS and LAN setups showed only a marginal difference in their performance. This demonstrates the potential to horizontally scale the
decentralized access
control system using blockchain on cloud infrastructure.
Advisors/Committee Members: Dinh, Anh, Vassileva, Julita, Greer, Jim.
Subjects/Keywords: Decentralized access control; blockchain
…The objective of this research is to create a decentralized access control system using a… …some research has been done on decentralized access control [11]–[13]… …goal of the thesis is to establish a decentralized access control system, which provides
the… …How to create a decentralized access control system?
In a decentralized and collaborative… …decentralized access control mechanism is crucial for
decentralized systems.
b) How can…
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APA (6th Edition):
Jamsrandorj, T. 1. (2017). DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/8087
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jamsrandorj, Tom 1983-. “DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN.” 2017. Thesis, University of Saskatchewan. Accessed January 18, 2021.
http://hdl.handle.net/10388/8087.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jamsrandorj, Tom 1983-. “DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN.” 2017. Web. 18 Jan 2021.
Vancouver:
Jamsrandorj T1. DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN. [Internet] [Thesis]. University of Saskatchewan; 2017. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10388/8087.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jamsrandorj T1. DECENTRALIZED ACCESS CONTROL USING THE BLOCKCHAIN. [Thesis]. University of Saskatchewan; 2017. Available from: http://hdl.handle.net/10388/8087
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Mehmetoglu, Mustafa Said.
A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies.
Degree: 2016, University of California – eScholarship, University of California
URL: http://www.escholarship.org/uc/item/8fq9f7t5
► This dissertation is concerned with the problem of global optimization of delay constrained communication and control strategies. Specifically, the objective is to obtain optimal encoder…
(more)
▼ This dissertation is concerned with the problem of global optimization of delay constrained communication and control strategies. Specifically, the objective is to obtain optimal encoder and decoder functions that map between the source space and the channel space, to minimize a given cost functional. The cost surfaces associated with these problems are highly complex and riddled with local minima, rendering gradient descent based methods ineffective. This thesis proposes and develops a powerful non-convex optimization method based on the concept of deterministic annealing (DA) - which is derived from information theoretic principles with analogies to statistical physics, and was successfully employed in several problems including vector quantization, classification and regression. DA has several useful properties including reduced sensitivity to initialization and strong potential to avoid poor local minima. DA-based optimization methods are developed here for the following fundamental communication problems: the Wyner-Ziv setting where only a decoder has access to side information, the distributed setting where independent encoders transmit over independent channels to a central decoder, and analog multiple descriptions setting which is an extension of the well known source coding problem of multiple descriptions. Comparative numerical results are presented, which show strict superiority of the proposed method over gradient descent based optimization methods as well as prior approaches in literature. Detailed analysis of the highly non-trivial structure of obtained mappings is provided. The thesis further studies the related problem of global optimization of controller mappings in decentralized stochastic control problems, including Witsenhausen's celebrated 1968 counter-example. It is well-known that most decentralized control problems do not admit closed-form solutions and require numerical optimization. An optimization method is developed, based on DA, for a class of decentralized stochastic control problems. Comparative numerical results are presented for two test problems that show strict superiority of the proposed method over prior approaches in literature, and analyze the structure of obtained controller functions.
Subjects/Keywords: Electrical engineering; Communications; Decentralized Control; Deterministic Annealing; Optimization
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APA (6th Edition):
Mehmetoglu, M. S. (2016). A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies. (Thesis). University of California – eScholarship, University of California. Retrieved from http://www.escholarship.org/uc/item/8fq9f7t5
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mehmetoglu, Mustafa Said. “A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies.” 2016. Thesis, University of California – eScholarship, University of California. Accessed January 18, 2021.
http://www.escholarship.org/uc/item/8fq9f7t5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mehmetoglu, Mustafa Said. “A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies.” 2016. Web. 18 Jan 2021.
Vancouver:
Mehmetoglu MS. A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies. [Internet] [Thesis]. University of California – eScholarship, University of California; 2016. [cited 2021 Jan 18].
Available from: http://www.escholarship.org/uc/item/8fq9f7t5.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mehmetoglu MS. A Deterministic Annealing Framework for Global Optimization of Delay-Constrained Communication and Control Strategies. [Thesis]. University of California – eScholarship, University of California; 2016. Available from: http://www.escholarship.org/uc/item/8fq9f7t5
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manchester
27.
Dallali, Houman.
Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan.
Degree: PhD, 2012, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-dynamic-stabilisation-of-a-compliant-humanoid-robot-coman(474662c6-8f0a-4f21-9504-5c49cb509231).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553541
► This dissertation presents the results of a series of studies on dynamic stabilisation of CoMan, which is actuated by series elastic actuators. The main goal…
(more)
▼ This dissertation presents the results of a series of studies on dynamic stabilisation of CoMan, which is actuated by series elastic actuators. The main goal of this dissertation is to dynamically stabilise the humanoid robot on the floor by the simplest multivariate feedback control for the purpose of walking. The multivariable scheme is chosen to take into account the joints' interactions, as well as providing a systematic way of designing the feedback system to improve the bandwidth and tracking performance of CoMan's existing PID control. A detailed model is derived which includes all the motors and joints state variables and their multibody interactions which are often ignored in the previous studies on bipedal robots in the literature. The derived dynamic model is then used to design multivariable optimal control feedback and observers with a mathematical proof for the relative stability and robustness of the closed loop system in face of model uncertainties and disturbances. In addition, two decentralized optimal feedback design algorithms are presented that explicitly take the compliant dynamics and the multibody interactions into account while providing the mathematical proof for the stability of the overall system. The purpose of the proposed decentralized control methods is to provide a systematic model based PDPID design to replace the existing PID controllers which are derived by a trial and error process. Moreover, the challenging constrained and compliant motion of the robot in double support is studied where a novel constrained feedback design is proposed which directly takes the compliance dynamics, interactions and the constraints into account to provide a closed loop feedback tracking system that drives the robot inside the constrained subspace. This method of control is particularly interesting since most control methods applied to closed kinematic chains (such as the double support phase) are over complicated for implementation purposes or have an ad-hoc approach to controller design. In terms of walking trajectory generation, an extension to the ZMP walking trajectory generation is proposed to utilise the CoMan's upper body to tackle the non-minimum phase behaviour that is faced in trajectory generation. Simple inverted pendulum models of walking are then used to study the maximum feasible walking speed and step size where parameters of CoMan are used to provide numerical upperbounds on the step size and walking speed. Use of straight knee and toe push-off during walking is shown to be beneficial for taking larger step lengths and hence achieving faster walking speeds. Subsequently, the designed tracking systems are then applied to a dynamic walking simulator which is developed during this PhD project to accurately model the compliant walking behaviour of the CoMan. A walking gait is simulated and visualized to show the effectiveness of the developed walking simulator. Moreover, the experimental results and challenges faced during the implementation of the designed tracking control systems are…
Subjects/Keywords: 629.892; CoMan; Compliant Humanoid Robot; Centralized and Decentralized Control.
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APA (6th Edition):
Dallali, H. (2012). Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-dynamic-stabilisation-of-a-compliant-humanoid-robot-coman(474662c6-8f0a-4f21-9504-5c49cb509231).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553541
Chicago Manual of Style (16th Edition):
Dallali, Houman. “Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan.” 2012. Doctoral Dissertation, University of Manchester. Accessed January 18, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-dynamic-stabilisation-of-a-compliant-humanoid-robot-coman(474662c6-8f0a-4f21-9504-5c49cb509231).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553541.
MLA Handbook (7th Edition):
Dallali, Houman. “Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan.” 2012. Web. 18 Jan 2021.
Vancouver:
Dallali H. Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan. [Internet] [Doctoral dissertation]. University of Manchester; 2012. [cited 2021 Jan 18].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-dynamic-stabilisation-of-a-compliant-humanoid-robot-coman(474662c6-8f0a-4f21-9504-5c49cb509231).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553541.
Council of Science Editors:
Dallali H. Modelling and dynamic stabilisation of a compliant humanoid robot, CoMan. [Doctoral Dissertation]. University of Manchester; 2012. Available from: https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-dynamic-stabilisation-of-a-compliant-humanoid-robot-coman(474662c6-8f0a-4f21-9504-5c49cb509231).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553541
University of Windsor
28.
Willis, Jordan Tyler.
Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power.
Degree: MS, Computer Science, 2015, University of Windsor
URL: https://scholar.uwindsor.ca/etd/5482
► Wireless access in vehicular environments (WAVE) is a vehicle to vehicle (V2V) communications technology which could help prevent up to 82% of non-impaired accidents,…
(more)
▼ Wireless access in vehicular environments (WAVE) is a vehicle to vehicle (V2V) communications technology which could help prevent up to 82% of non-impaired accidents, according to the US DOT. A 2013 study by the World Health Organization estimated 2,227 road fatalities in 2009 alone. Currently the channel that is responsible for a vehicle’s awareness of others suffers from congestion at moderate loads. In this paper we propose a novel method for adjusting the transmission power in a pattern which alternates between high and low powered transmissions. We modify one commonly used
decentralized congestion
control (DCC) algorithm, LIMERIC, and compare the power adaptation model against two controls. WAVE supports a 300 meter transmission radius, however, less than 200 vehicles can communicate at the target rate of 10 transmissions per second. We demonstrate that our algorithm reduces the number of packets received by distant vehicles, while maintaining a higher packet rate to the closer vehicles, for which a higher rate is more important.
Advisors/Committee Members: Jaekel, Arunita, Kent, Robert.
Subjects/Keywords: Beacon; Decentralized Congestion Control; Transmit Power; V2V; WAVE
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APA (6th Edition):
Willis, J. T. (2015). Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power. (Masters Thesis). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/5482
Chicago Manual of Style (16th Edition):
Willis, Jordan Tyler. “Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power.” 2015. Masters Thesis, University of Windsor. Accessed January 18, 2021.
https://scholar.uwindsor.ca/etd/5482.
MLA Handbook (7th Edition):
Willis, Jordan Tyler. “Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power.” 2015. Web. 18 Jan 2021.
Vancouver:
Willis JT. Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power. [Internet] [Masters thesis]. University of Windsor; 2015. [cited 2021 Jan 18].
Available from: https://scholar.uwindsor.ca/etd/5482.
Council of Science Editors:
Willis JT. Decentralized Congestion Control Algorithm for Vehicle to Vehicle Networks Using Oscillating Transmission Power. [Masters Thesis]. University of Windsor; 2015. Available from: https://scholar.uwindsor.ca/etd/5482
Virginia Tech
29.
Geuther, Brian Q.
Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence.
Degree: MS, Mechanical Engineering, 2013, Virginia Tech
URL: http://hdl.handle.net/10919/23751
► Collective robotic behavior poses significant advantages over classical control methods such as system response and robustness. Biological cooperative communities have provided great insights for development…
(more)
▼ Collective robotic behavior poses significant advantages over classical
control methods such as system response and robustness. Biological cooperative communities have provided great insights for development of many
control algorithms. Localized chemical signaling within bacterial communities is used for directed movement and dynamic density measurements. Both individual and population scale models have been created to adequately model community dynamics. These dynamics, including directed motion due to chemotaxis and density controlled functionality from quorum sensing, are modeled through an individual scale in a community scale environment. This modeling provides both a platform for analyzing the BacteriaBot engineered system as well as inspires
decentralized stochastic
control techniques for solving bacteria-like collaborative
control problems.
Advisors/Committee Members: Behkam, Bahareh (committeechair), Abaid, Nicole (committee member), Leonessa, Alexander (committee member).
Subjects/Keywords: Bacteria; Computational Modeling; Population Scale Modeling; Chemotaxis; Quorum Sensing; Decentralized Control
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MLA ·
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APA (6th Edition):
Geuther, B. Q. (2013). Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/23751
Chicago Manual of Style (16th Edition):
Geuther, Brian Q. “Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence.” 2013. Masters Thesis, Virginia Tech. Accessed January 18, 2021.
http://hdl.handle.net/10919/23751.
MLA Handbook (7th Edition):
Geuther, Brian Q. “Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence.” 2013. Web. 18 Jan 2021.
Vancouver:
Geuther BQ. Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10919/23751.
Council of Science Editors:
Geuther BQ. Towards Bacteria Inspired Stochastic Control Strategies for Microrobotic Swarm Intelligence. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/23751
University of Manchester
30.
Zhang, Zedong.
Decentralized Control of Distributed Generation in Future
Distribution Networks.
Degree: 2017, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:311925
► Environmental targets set by governments around the world are leading to high penetrations of small to medium-scale renewable distributed generation (DG). High penetration of DG…
(more)
▼ Environmental targets set by governments around the
world are leading to high penetrations of small to medium-scale
renewable distributed generation (DG). High penetration of DG in
distribution networks, however, can result in voltage and thermal
issues among other technical problems. The traditional “Fit &
Forget†approach that refers to the passive use of assets with
limited or no
control, in the context of distribution network
planning, is used to meet maximum demand or generation
requirements. However, to ensure that more renewable generation is
cost-effectively connected to distribution networks, it is
imperative to adopt a more active
control of network elements and
participants. The active
control of future distribution networks
requires understanding the corresponding dependencies between
voltage magnitudes and DG active/reactive power outputs to mitigate
voltage issues. One classical method to calculate these
dependencies is to use sensitivity approaches such as those based
on the Jacobian matrix. However, during operation, updating the
Jacobian matrix requires the network to be fully observable making
it unfeasible for
decentralized control approaches. Therefore, it
is critical to develop a sensitivity approach only requiring local
real-time information. This thesis proposes a novel approach to
produce voltage sensitivity coefficients using the surface fitting
technique based solely on knowledge of network characteristics and,
therefore, no remote monitoring is required. To assess the
performance of the proposed voltage sensitivity approach, a
decentralized (local) voltage
control algorithm that simultaneously
caters for both the active and reactive power outputs of a single
DG plant is adopted. Comparisons with classical sensitivity
approaches are carried out using the 16-bus UK GDS test network,
1-min resolution demand and wind generation data. Persistence
forecasting (i.e., assuming no changes in demand and wind in a
short time period) is considered in this case. The lower Mean
Squared Error (MSE) shows that the coefficients of the proposed
sensitivity approach are close to those of the Jacobian matrix and
better than the perturb-and-observe approach. In the context of
voltage management, results highlight that the proposed sensitivity
approach is more effective than the Jacobian matrix inverse and
perturb-and-observe, resulting in better voltage compliance and
energy harvesting (better capacity factor). It should be
highlighted that this performance is achieved without the need of
full network observability. Furthermore, to cater for the more
realistic and complex case of multiple DG plants, this thesis
proposes a time-delay based
decentralized control algorithm. A
comparison with an ideal AC Optimal Power Flow (OPF) is carried out
using the same 16-bus UK GDS network but with seven DG plants. The
results demonstrate that the proposed sensitivity approach and time
delays are very effective when compared to the AC OPF. This, in
turn, proves that the combined use of the proposed voltage
sensitivity…
Advisors/Committee Members: LI, HAIYU H, Ochoa, Luis Nando, Li, Haiyu.
Subjects/Keywords: decentralized control; distributed generation; distribution networks; voltage sensitivity
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Zhang, Z. (2017). Decentralized Control of Distributed Generation in Future
Distribution Networks. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:311925
Chicago Manual of Style (16th Edition):
Zhang, Zedong. “Decentralized Control of Distributed Generation in Future
Distribution Networks.” 2017. Doctoral Dissertation, University of Manchester. Accessed January 18, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:311925.
MLA Handbook (7th Edition):
Zhang, Zedong. “Decentralized Control of Distributed Generation in Future
Distribution Networks.” 2017. Web. 18 Jan 2021.
Vancouver:
Zhang Z. Decentralized Control of Distributed Generation in Future
Distribution Networks. [Internet] [Doctoral dissertation]. University of Manchester; 2017. [cited 2021 Jan 18].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:311925.
Council of Science Editors:
Zhang Z. Decentralized Control of Distributed Generation in Future
Distribution Networks. [Doctoral Dissertation]. University of Manchester; 2017. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:311925
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Open Access Theses and Dissertations
