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Fault accommodation for nonlinear systems using fuzzy adaptive sliding control. (English) Zbl 1085.93518

Summary: An active fault accommodation control law is developed for a class of nonlinear systems to guarantee the closed-loop stability in the presence of a fault, based on a fuzzy logic system representation of the dynamics due to faults. It uses the fuzzy logic system to approximate the dynamics caused by the fault. Through the adaptive process of the parameters, the dynamics caused by the fault is counteracted. The fuzzy sliding mode control is introduced to attenuate the fuzzy approximation error. Simultaneously, the closed-loop system is stable in Lyapunov sense and the tracking error converges to a neighbourhood of zero. An example of the proposed design indicates that the fault accommodation control law is effective for a nonlinear system.

MSC:

93C42 Fuzzy control/observation systems
93B12 Variable structure systems
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References:

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