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针对飞控系统故障引起的参数跳变问题,提出一种基于交互式多模型飞控系统容错控制方法,该算法建立在多个辨识模型和最优二次型控制、特征值配置的基础上。首先,根据作动器故障参数模型设计一系列并行的辨识模型,每个模型对应一种故障;然后,分别采用最优二次型控制和特征值配置的方法设计对应于正常模型和故障模型的控制器;最后,基于交互式多模型方法对飞控系统进行实时故障隔离与重构。通过某型飞机横侧向飞行控制系统仿真表明,在执行器严重受损的情况下,飞机仍能保持良好的性能。
Aiming at the problem of parameter jump caused by flight control system fault, a fault tolerant control method based on interactive multi-model flight control system is proposed. The algorithm is based on multiple identification models and the optimal quadratic control and eigenvalue configuration. First of all, a series of parallel identification models are designed according to the actuator failure parameter model, and each model corresponds to a kind of failure. Then, the optimal quadratic control and eigenvalue configuration are used to design the model corresponding to normal model and fault model Controller; Finally, real-time fault isolation and reconstruction of flight control system based on interactive multi-model method. The simulation of lateral flight control system of a certain type of aircraft shows that the aircraft can still maintain good performance in the case of serious damage to the actuator.