This article deals with the problem of attitude tracking control for flexible satellite under flexible vibration disturbance, actuator fault and time delay. Based on disturbance observer and fault tolerant control techniques, the flexible vibration disturbance and actuator fault are effectively estimated by disturbance observer and fault estimation observer, respectively. Meanwhile, a delay-dependent attitude tracking feedback controller is designed to ensure that the reference attitude is stably tracked. To reduce the conservatism of the designed algorithm, a time delay correlative decomposition factor is introduced to make the flexible satellite have a better performance for attitude tracking control. Finally, the effectiveness of the proposed method is illustrated by numerical simulations.

本文研究了柔性卫星在柔性振动扰动、执行器故障和时滞下的姿态跟踪控制问题。基于扰动观测器和容错控制技术，分别通过扰动观测器和故障估计观测器有效地估计了柔性振动扰动和执行器故障。同时，设计了一个依赖于延迟的姿态跟踪反馈控制器，以确保稳定跟踪参考姿态。为降低算法的保守性，引入时延相关分解因子使柔性卫星具有更好的姿态跟踪控制性能。最后，通过数值模拟说明了所提出方法的有效性。