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		Bing Liang,Guangren Duan.[en_title][J].Control Theory and Technology,2004,2(3):288~292.[Copy]

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BingLiang,GuangrenDuan
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Received:March 31, 2004Revised:August 10, 2004

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Robust H-infinity fault-tolerant control for uncertain descriptor systems by dynamical compensators

Bing Liang,Guangren Duan

(Center of Control Theory and Guidance Technology, Harbin Institute of Technology Harbin, 150001 Heilongjiang, China)

Abstract:

The problem of robust H-infinity fault-tolerant control against sensor failures for a class of uncertain descriptor systems via dynamical compensators is considered. Based on H-infinity theory in descriptor systems, a sufficient condition for the existence of dynamical compensators with H-infinity fault-tolerant function is derived and expressions for the gain matrices in the compensators are presented. The dynamical compensator guarantees that the resultant colsed-loop system is admissible; furthermore, it maintains certain H-infinity norm performance in the normal condition as well as in the event of sensor failures and parameter uncertainties. A numerical example shows the effect of the proposed method.

Key words: Fault-tolerant control H-infinity control Uncertain descriptor systems Sensor failures