一种全包线容错飞行控制方案的设计与仿真

Design and Simulation of Full Envelope Flight Fault Tolerant Control Scheme

基于多模型切换控制思想和模型参考自适应理论,设计无需故障检测与分离模块的全包线容错飞行控制系统。针对飞行包线内所有特征点处的线性定常子模型,建立了高品质的参考模型,而后应用超稳定性理论设计获得一簇自适应控制律,并采用遗传算法对其控制增益进行优化选择。通过配置补偿器在线调节待切换控制器的输出,有效抑制了飞机跨越不同特征点邻域时产生的控制器切换抖动。通过某型飞机纵向运动仿真表明,提出的控制方案具有良好的容错能力。

Based on multi-model switching control theory and model reference adaptive control theory, a full envelope flight fault tolerant control scheme without fault detective and isolation module was proposed. For each linear time-invariant model of different operation points in the flight envelope, a high quality reference model was designed. Then a series of adaptive control laws were obtained using hyper-stability theory and they were optimized applying improved genetic algorithm. In order to attenuate controller switching chattering while flight state varies from the neighborhood of an operating point into that of the next, a compensator was configured to make the waiting controllers output approximate to that of the currently working controller. Simulation results show that the control scheme proposed keeps desired performance when actuator failure occurs.