Main Steam Temperature Control And Fault Diagnosis System Based On State Observer

Traditional PID controller has such characteristics as simple and robust. State feedback could improve dynamic characteristics of a controlled object. We design a state feedback-PID controller in which its outer loop uses a PID controller and its inner loop adopts a state feedback controller. So this control system has robust and fine control quality. Through reasonable observer's pole assignment we realize sensor's fault diagnosis using a state observer. Typical fault of sensors in main steam temperature control system could be detected by fault diagnosis method based on model. Basic tenets on pole assignment are summarized in the papers. Simulation shows that this scheme could finish two functions of control and fault diagnosis, and made system design be simplified.Ding Jun-hong (Control Theory and Control Engineering)Directed by Prof. Tian Pei...