LPV ACTIVE FAULT-TOLERANT CONTROL STRATEGY OF LARGE CIVIL AIRCRAFT UNDER ELEVATOR FAILURES

This paper proposes a scheme to achieve fault tolerant control to elevator failure of large aircraft. Meanwhile, the model of aircraft is expressed by linear-parameter-varying (LPV), and an LPV controller is designed. The approaches of H-infinity and pole assignment using linear matrix inequalities (LMIs) tools are used to design the states feedback controller, keeping the stability, rapidity and robustness. Moreover, an additional scheduling parameter of effectiveness of the elevator is introduced to the model and controller, keeping the desired performance when elevator failure happens by the nominal controller, avoiding the retuning the controller. The simulation are shown to prove the method.