Abstract:

Fault-tolerant control laws by means of control reconfiguration for a class of uncertain systems after actuators have failed are presented. When actuator failures occur, the expected goal is to find an appropriate virtual actuator to make the output of the faulty plant be identical to the output of the nominal system. When actuators are partly inefficiency, a solution by using Lyapunov stability theorem is proposed. When some actuators are totally inefficiency, the methods of pole assignment of D-stability and H_∝ disturbance rejection are investigated. Using linear matrix inequality technique, the solution is solved. Finally, a simulation example of an aircraft model is performed to show the effectiveness of the proposed approaches.