基于自适应动态规划的运载火箭智能姿态容错控制

This paper investigates the problem of attitude control for the launch vehicle with actuator faults. An Adaptive Dynamic Programming (ADP) based intelligent fault-tolerant control scheme is developed, which mainly includes two parts: the stable control part and optimization supplementary part. For the stable control part, the adaptive control technology and the sliding mode variable structure control are used to maintain stability of the fault-tolerant controller, so as to guarantee the stalibilty of the close-loop system and finite-time convergence of the tracking errors. An optimization supplementary controller with the actor-critic structure is also designed to further improve the attitude tracking performance and provide additional compensation control according to the tracking errors caused by actuator faults or external disturbances. The simulation results show that the proposed method can ensure the system stablility and accurate tacking of commands even when there exist malfunctions.