Adaptive Observer based Fault Tolerant Control for Aircraft Engine with Sensors and Actuators Faults

The fault tolerant control on the basis of adaptive observer for aircraft engine with both sensors faults and actuators faults is considered in this paper. The adaptive observer can reconstruct the fault signal when the sensors and actuators faults appear simultaneously. And the obtained fault estimation signals are sent to the input and output terminals of the controller respectively to offset the faults of actuators and sensors. The aircraft engine fault tolerant control system is constructed as a result. It is proven that the faults estimation errors are stable by Lyapunov theory. Simulation on the two typical operation points of aircraft engine shows that the fault tolerant control system can effectively reduce the impact of sensor and actuator failures on the system.