关键词: 未知时变惯量, 执行机构衰退, 外界干扰, 非刚体航天器, 自适应容错控制

Abstract: This paper investigates an adaptive attitude tracking fault-tolerant control problem for non-rigid spacecraft with unknown time-varying inertia, actuator fading and external disturbance. Based on nonlinear robust control, adaptive approach, fault-tolerant control theory and parameter estimation method, a novel robust adaptive attitude tracking fault-tolerant control law is proposed. The proposed controller overcomes the influence of actuator fault, inertia uncertainty and external disturbance. And, it can regulate the attitude and angular velocity to the desired states and guarantee that the ultimately uniform and bounded stability of the error system is achieved. Simulation results validate the effectiveness of the presented control algorithm and demonstrate the better performance of designed control approach compared with other method.

Key words: unknown time-varying inertia, actuator fading, external disturbance, non-rigid spacecraft, adaptive fault-tolerant control