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Adaptive Fault Detection and Isolation Approach for Actuator Stuck Faults in Closed-Loop Systems

Xiao-Jian Li and Guang-Hong Yang
International Journal of Control, Automation, and Systems, vol. 10, no. 4, pp.830-834, 2012

Abstract : This paper addresses the fault detection and isolation (FDI) problem for linear time-invariant (LTI) systems under feedback control. Considered all the possible actuator stuck faults, the closed-loop sys-tems are modeled via multiple models, i.e., fault-free model and faulty models. A fault detection observer and a bank of fault isolation observers are designed by using adaptive estimation techniques. The explicit fault detectability and isolability conditions are derived for determining the class of faults that are detectable and isolable. An F-18 aircraft model is employed to illustrate the effectiveness of the proposed FDI approach.

Keyword : Actuator stuck faults, adaptive observer, fault detection, fault isolation.

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