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卫星在实施轨道控制期间,轨道机动推力会影响卫星的姿态稳定。本文针对存在推力干扰的挠性卫星,研究执行器故障情况下姿控系统的容错控制问题。首先设计一种基于反步自适应变结构的被动容错控制器实现姿态稳定,在此基础上,采用分布式智能部件作为执行器,设计补偿项以更好地抑制挠性结构的振动和常值变形。最后,以轨控期间挠性卫星姿态控制系统的飞轮故障为应用实例进行数值仿真。仿真结果验证了本文所设计的姿态容错控制器的有效性和可行性。
Satellite orbit maneuvering thrust will affect satellite attitude stability during satellite orbit control. In this paper, we study the fault-tolerant control problem of the attitude-control system under the condition of actuator failure for flexible satellites with thrust disturbance. First, a passive fault-tolerant controller based on backstepping adaptive variable structure is designed to achieve attitude stability. Based on this, a distributed intelligent component is used as actuator to design compensation term to better restrain the vibration and constant value of flexible structure Deformation. Finally, the flywheel fault of the attitude control system of flexible satellite during orbit control is used as numerical simulation. The simulation results verify the effectiveness and feasibility of the attitude fault tolerant controller designed in this paper.