FTC approach based on predictive governor

In this paper, a new approach of reconfigured system is proposed to improve the performance of an active fault tolerant control system. The method is based on model predictive control and reference trajectory adjustment techniques. When an actuator fault occurs in the system, the controller balances to the nearest degraded reference trajectory. A constraint set and cost function are established to avoid actuators saturation and reduce control energy spent in closed loop dynamics. The effectiveness of the proposed method has been illustrated using a hydrothermal system subject to actuator failure and constraints on the actuator dynamic ranges. Satisfactory results have been obtained.