Application of new robust fault-tolerant controller in flight control system

A new robust fault-tolerant controller which could be used in a flight control system was discussed. This controller contained two controllers. One was the main controller and the other was the compensator. First, a normal airplane was modeled. Fault detection residual was generated by comparing the output of the normal model and actual flight system. When there was no fault, the fault detection residual was nearly zero. Only the main controller which was carried out by the aero control surface worked to guarantee a good performance of the system. Once an actuator fault happened, the residual that was the input of the compensator would jump suddenly. Then a compensator which was carried out by the thrust vector was used to guarantee the stability of the whole system. At last, the simulation results showed the feasibility and validity of the new controller.