Vol. 172, Issue 6, June 2014, pp. 247-253

Abstract: A fuzzy fault-tolerant control scheme is proposed for a class of multiple input fuzzy bilinear systems with unmeasurable states. First, a fuzzy detective observer is designed to detect the fault. Based on the developed detective observer, a fuzzy controller is proposed to guarantee the closed-loop system without faults is asymptotically stable. Then, a fuzzy adaptive diagnostic observer is designed to estimate the fault. At last, the fault estimation is used to fault accommodation and a fault- tolerant controller is designed. Based on Lyapunov stability, it is proved that the fault-tolerant controller ensures the closed-loop system with faults is asymptotically stable. An example is provided to show the effectiveness of the proposed method.

Keywords: Fuzzy bilinear system, Fuzzy fault-tolerant controller, Fuzzy detective observer, Fuzzy adaptive diagnostic observer, Fault accommodation.

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