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Observer-based H-infinity output feedback control with feedback gain and observer gain variations for Delta operator system
Received:April 10,2007  Revised:May 22,2008
Keywords:Observer  Delta operator system  Robust control  Output feedback  LMI
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Ruiquan LIN, Fuwen YANG, Renchong PENG College of Electrical Engineering and Automation, Fuzhou University, Fuzhou Fujian 350002, China 
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Abstract:
      Considering that the controller feedback gain and the observer gain are of additive norm-bounded variations, a design method of observer-based H-infinity output feedback controller for uncertain Delta operator systems is proposed in this paper. A sufficient condition of such controllers is presented in linear matrix inequality (LMI) forms. A numerical example is then given to illustrate the effectiveness of this method, that is, the obtained controller guarantees the closed-loop system asymptotically stable and the expected H-infinity performance even if the controller feedback gain and the observer gain are varied.
Ruiquan LIN, Fuwen YANG, Renchong PENG.Observer-based H-infinity output feedback control with feedback gain and observer gain variations for Delta operator system[J].Journal of Control Theory and Applications,2009,7(2):169~.
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