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Performance, robustness and implementation of controllers
Buchta, Luděk ; Michal, Mrázek (referee) ; Pivoňka, Petr (advisor)
This master‘s thesis deals with the design of modern process control algorithms suitable for SISO industrial control equipments. In this thesis the analysis of the controller design methodology using Mixed-sensitivity function is described. This method consists in shaping frequency characteristics of the sensitivity function and complementary sensitivity fiction using the weighting functions. The proposed H controllers are compared with the classical structure of a discrete PID controller with filtered derivative part. The proposed controllers are compared in terms of robustness, performance, complexity of the design and requirements necessary for their practical application (anti-windup, smooth switchover). Robustness of the controller is evaluated on the basis of modulus stability margin. Estimation of model´s parameters is solved least-square method. The proposed control system consists of an industrial PC and Automation Panel from the company B&R, decentralized system I/O and the real plant. Visualization for control workplace was created in the program Automation studio. This visualization is used to the easy transfer of information from a controlled process.
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Anti-windup Schemes for Linear Dynamical Systems Control
Kozubík, Michal ; Pohl, Lukáš (referee) ; Václavek, Pavel (advisor)
The aim of this bachelor thesis is to study windup effect and methods of its compensation. Introduced methods are clamping, back-calculation, internal model control (IMC) and design based on solution of linear matrix inequalities (LMI). The Matlab tool was created for the last two methods. All mentioned methods were then tested on chosen systems by simulaton in Matlab Simulink. After that results of simulation were evaluated with respect to computational time, overshoot, settling time and ITAE criterion.
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Modeling and simulation of the electric motor control
Kečkéš, Adam ; Pohl, Lukáš (referee) ; Bartík, Ondřej (advisor)
The aim of this bachelor's thesis is to study the issues of modeling three-phase electric motors and subsequently to create a suitable motor model in the d,q coordinates. The thesis outlines the issues related to controlling three-phase motors, based on which the Six-step and Vector control algorithms are implemented and analyzed. A simulation demonstrating closed-loop control with a suitable algorithm is created for the prepared motor model in the d,q coordinates. Subsequently, a suitable state feedback controller is implemented. The final part of the thesis consists of analyzing nonlinearities such as friction and dead zone.
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Anti-windup Schemes for Linear Dynamical Systems Control
Kozubík, Michal ; Pohl, Lukáš (referee) ; Václavek, Pavel (advisor)
The aim of this bachelor thesis is to study windup effect and methods of its compensation. Introduced methods are clamping, back-calculation, internal model control (IMC) and design based on solution of linear matrix inequalities (LMI). The Matlab tool was created for the last two methods. All mentioned methods were then tested on chosen systems by simulaton in Matlab Simulink. After that results of simulation were evaluated with respect to computational time, overshoot, settling time and ITAE criterion.
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Performance, robustness and implementation of controllers
Buchta, Luděk ; Michal, Mrázek (referee) ; Pivoňka, Petr (advisor)
This master‘s thesis deals with the design of modern process control algorithms suitable for SISO industrial control equipments. In this thesis the analysis of the controller design methodology using Mixed-sensitivity function is described. This method consists in shaping frequency characteristics of the sensitivity function and complementary sensitivity fiction using the weighting functions. The proposed H controllers are compared with the classical structure of a discrete PID controller with filtered derivative part. The proposed controllers are compared in terms of robustness, performance, complexity of the design and requirements necessary for their practical application (anti-windup, smooth switchover). Robustness of the controller is evaluated on the basis of modulus stability margin. Estimation of model´s parameters is solved least-square method. The proposed control system consists of an industrial PC and Automation Panel from the company B&R, decentralized system I/O and the real plant. Visualization for control workplace was created in the program Automation studio. This visualization is used to the easy transfer of information from a controlled process.
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