Robust fault diagnosis for a class of bilinear systems withuncertainty

摘要

In this paper, the fault diagnosis problem for a class of bilinearsystems with uncertainty is discussed. The systems are transformed intotwo different subsystems. One is not affected by actuator fault, so therobust reduced order observer can be designed such that, under certainconditions, the observer error dynamics is completely independent of theinputs. The other whose states can be measured is affected by thefaults. The observation scheme is then used for model-based monitoringand fault diagnosis. More specifically, a simple approach for faultdetection and isolation of actuator fault is presented. Finally, anexample of a semi-active suspension system is used to illustrate theapplicability of proposed method