高超声速飞行器的自适应容错控制

Adaptive fault-tolerant control for hypersonic vehicle

针对高超声速飞行器再入过程中可能出现的执行器部分失效或卡死故障,设计了一种飞行器自适应容错控制器。在系统存在外界干扰及未知故障输入且上界未知的情况下,该控制器采用自适应算法在线估计未知的控制器参数,在执行器发生卡死或部分失效故障时,实现了对故障的容错控制和对制导指令的鲁棒输出跟踪。通过Lyapunov方法证明了该方法在执行器存在故障时能保证系统渐进稳定,仿真算例说明了该方法的有效性。

Aimed at the problem that the actuator may be stuck or lose effectiveness during reentry of hypersonic vehicle,a new adaptive fault tolerant controller was designed.While external disturbance and actuator failures are unknown,the adaptive laws were proposed to estimate the unknown controller parameters online.The control law can realize fault tolerant controlling to actuator failures and robust output tracking to guidance order while the actuator is stuck.The algorithm is validated to ensure the system be asymptotically stable by Lyapunov approach,and simulation results demonstrate the effectiveness of the proposed method.