飞机的模型参考容错控制

 本文针对飞机内部元件或控制元件的故障,用检测滤波器理论设计了相应的故障检测器和故障参数估计器,并用Lyapunov稳定性理论设计了模型参考自适应容错控制律,从而保证了在内部故障情况下飞行控制系统的稳定性。

THE MODEL REFERENCE FAULT TOLERANT CONTROL IN AIRCRAFT

In dynamic systems, the failure of a sensor or controller may lead to serious deterioration of system performance and even make the system not work normally. At present, a state observer or filter is mainly applied to the detection of sensor or controller failure to provide analytic redundancy. However, in real systems there are many uncertain factors. During the design of a state estimator, one can meet the problem that the state estimates deviate from the real values of the uncertainties of parameters are neglected.In this paper, the detection filter theory is applied to the design of the fault detector and the fault parameter identifier for the aircraft with the internal element or control element fault. Because Lyapunov's stability theory is applied, the fault tolerant control law can ensure the stability of the flight control system.A model reference fault tolerant control system is designed and simulated using a short period longitudinal model of a certain aircraft. Because the flight range of the aircraft is very large, its parameter variation is very violent. When the aircraft is normal, a parameter robust controller in the system is designed in order to obtain good performances under every flight state.