Actuator fault detection on a process control experimental system using combined observers

This paper is concerned with the actuator fault detection problem for a process control experimental system using combined observers. That is, a fault detection system is designed for a water level control valve of a process experimental system by using a disturbance observer. Moreover, for the process experimental system with uncertainties, an adaptive observer using an unknown parameter identification mechanism combining with a disturbance observer is proposed to deal with the actuator fault detection problem. The effectiveness of the proposed method is confirmed by experimental results.