The Research of Robust Fault Tolerant Control Method for Non-Minimum-Phase and Non-Self-Balancing System

In this paper, the water level control principle and fault model of SG are introduced. On the issue of parameter variation that caused by faults and disturbance, a robust fault tolerant controller is designed. Under the control of the designed robust fault tolerant controller, the closed-loop system can maintain stability and meet certain performance targets on the condition of normal operation and fault situation. The robust fault tolerant controller can suppress the influence of the uncertainty and minimizing the adverse effect of the actuator fault on the system. The feasibility, effectiveness and precision of the proposed method are simulated and analyzed. The result shows the capability of the designed controller in tracking, adapting, anti-interference and overcoming the impact of faults are evidently superior to standard robust controller.