Design of New Robust Fault-tolerant Controller For Flight Control Systems

A new robust fault-tolerant controller which can be used in a flight control system is discussed. This controller contains two controllers. One is the main controller and the other is the compensator. The main controller is designed for high performance of the original faultless system. The compensating controller can be seen as a standalone loop added to the system to compensate the effects of fault guaranteeing the stability of the system. A design method is proposed using nonlinear dynamic inverse control as the main controller and nonlinear extended state observer-based compensator. The stability of the whole closed-loop system is analyzed. Feasibility and validity of the new controller is demonstrated with an aircraft simulation example.