Actuator Fault Detection and Accommodation in Distributed Parameter Systems

ABSTRACT

This paper presents a general framework for model-based fault detection and accommodation for a class of distributed parameter systems with control actuator faults. A set of dedicated observers, each with its own time-varying threshold is constructed to detect the occurrence of fault in the corresponding actuator and reduce fault detection time. Additionally, an adaptive diagnostic observer is then designed and analyzed to estimate each individual actuator fault. Based on the online approximation of fault parameter, automated control reconfiguration architecture has been developed to accommodate actuator fault and to preserve closed-loop stability. An example has been discussed using the proposed scheme to demonstrate effectiveness of the method.

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