Sensor fault detection, identification and fault tolerant control: application to active suspension

In this paper, sensor fault detection, identification and accommodation model-based approach is designed for a nonlinear full vehicle´s active suspension model. The approach uses the model of the system and a bank of sliding mode observers to generate residuals. Residuals are defined in such a way to isolate the faulty sensor after detecting the occurrence of the fault. Once detected and isolated, the accommodation of the fault consists in replacing the lost measurement (due to sensor fault) by its estimation. In this study, only the complete breakdown of the sensor is considered. Simulation is made to illustrate the proposed strategy