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针对太阳帆板展开过程中存在系统切换和外部未知干扰的航天器姿态跟踪控制问题,提出了角速度可测和角速度不可测的姿态跟踪自适应动态比例微分(PD)控制器。本文先设计自适应更新律补偿外部复合干扰,提出了姿态角及角速度全状态可测的自适应PD控制器;接着针对角速度不可量测,基于无源控制理论给出估算角速度的动态观测器,提出一种仅有姿态角跟踪误差信息的变增益动态PD控制器,并理论证明了闭环系统的全局渐近稳定性;数值仿真验证了变增益动态PD控制器对太阳帆板展开过程中,航天器的姿态跟踪控制的鲁棒性和有效性。
Aiming at the problem of spacecraft attitude tracking control with system switching and external unknown disturbance during the process of solar sail deployment, an attitude adaptive dynamic PD controller with angular velocity and angular velocity is proposed. In this paper, an adaptive and updated law is first designed to compensate external compound interference. An adaptive PD controller with attitude and angular velocity under full state measurement is proposed. Then based on the passive control theory, a dynamic observer is proposed to estimate the angular velocity. A dynamic gain-dynamic PD controller with attitude error tracking error information is presented and the global asymptotic stability of the closed-loop system is proved theoretically. The numerical simulation verifies that dynamic PD controller with variable-gain can effectively control the solar panel, Robustness and Effectiveness of Attitude Tracking Control.