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National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.01 seconds. 
Robust control of PMS motors
 Rajnošek, Michal ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
This work is focused on robust control theory especially on methods H and analysis (structured singular value). The first part of the thesis contains theoreticle background to uncertainty modeling, to robust controller designs and to permanent magnet synchronous machine modeling. The second part presents concrette robust controller design which is tested in simulations and validated on a real motor. The influence of parameter changes on stability of closed loop system is discussed and description of obtained results is given in conclusions.
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Robust control of electromechanical systems
 Pohl, Lukáš ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
This thesis deals with the modern control approaches applicable to speed control of an induction motor. Historical perspective to the control theory and its evolution to the modern control will be presented in a short introduction. Basics of uncertainty modeling are presented along with linear fractional transformation (LFT) representation of an uncertain system. Two different approaches for robust controller synthesis are introduced - H-infinity loopshaping and mixed sensitivity H-infinity synthesis. Theoretical background is presented for both of these methods. Finally the robust controller for induction motor satisfying the control goals is designed using both methods. Design objectives are presented as transfer function weights shaping the sensitivity or complementary sensitivity function to desired shape. Several step responses were simulated to compare H-infinity loopshaping and mixed sensitivity H-infinity controllers with the conventional vector control approach.
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Robust control of AC induction motor drives
 Pohl, Lukáš ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
This bacherlor thesis deals with design of robust controller. In general it is about designing robust controller by using H-infinity control theory and input-output feedback linearization. Special structure of state-space equation governing the induction motor allows using linear parameter varying feedback controller scheduled with rotor speed for inner current loop. The proposed controller delivers high performance over the entire operating range of the induction motor and compares favorably with other published results
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National Repository of Grey Literature : 13 records found   previous11 - 13  jump to record:
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