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Output Feedback Fault-tolerant Control for a Class of Discrete-time Fuzzy Bilinear Systems

Yang Yu and Kang-Hyun Jo*
International Journal of Control, Automation, and Systems, vol. 14, no. 2, pp.486-494, 2016

Abstract : This paper studies the fault-tolerant control problem for a class of discrete-time fuzzy bilinear systems with unmeasurable states. A fuzzy detective observer is designed to detect the faults. Based on the fuzzy detective observer, a fuzzy controller is designed by solving a set of linear matrix inequalities (LMIs) to ensure that the closed-loop system without faults is asymptotically stable. For the discrete-time fuzzy bilinear system with faults, a fuzzy adaptive diagnostic observer is designed to estimate the faults by solving a set of LMIs. Then, a fuzzy faulttolerant controller is designed based on the fuzzy diagnostic observer to ensure that the closed-loop system with faults is asymptotically stable. At last, simulation results are presented to verify the effectiveness of the proposed output feedback fault-tolerant control method.

Keyword : Discrete-time systems, fault-tolerant control, fuzzy adaptive diagnostic observer, fuzzy bilinear systems, fuzzy detective observer.

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