A method for actuator fault diagnosis with robustness to sensor distortion

Abstract

Actuator fault diagnosis is often studied under strong assumptions on available sensors: Typically it is assumed that either the sensors are fault-free or there is a sufficient redundancy among the sensors. This chapter proposes a new method for actuator fault diagnosis, which is robust to sensor distortion. It does not require sensor redundancy to compensate sensor distortion. The essential assumption is that sensor distortions are strictly monotonous. Despite the nonlinear and unknown nature of distortions, such sensors still provide useful information for fault diagnosis. A numerical example is provided to illustrate the efficiency of the proposed method.