The invention discloses a flexible spacecraft attitude maneuver control method based on an observer, relates to the field of aerospace control systems, and solves the problem that the control performance is reduced due to vibration of flexible accessories and external interference when an existing spacecraft is subjected to in-orbit attitude maneuver. According to kinematics, dynamics and vibration equations of the flexible spacecraft, the method establishes a state equation with an attitude angle, modal information and disturbance quantity as state vectors by analyzing the type of interference of the spacecraft in near-earth orbit operation, and establishes a function observer to reconstruct part of information under the condition that part of modal information and disturbance information are unknown, so as to achieve the purpose of solving the problem. According to an error system, sufficient conditions for existence of the observer are obtained, and a controller composed of a state feedback part and a feed-forward compensation part is designed based on useful information output by the observer. The control requirement of the flexible spacecraft is met, and the spacecraft control precision is effectively improved.

    基于观测器的挠性航天器姿态机动控制方法,涉及航空航天控制系统领域,解决现有航天器在轨姿态机动时,挠性附件振动和外部干扰带来的控制性能下降的问题。本发明依据挠性航天器运动学、动力学和振动方程,通过分析航天器在近地轨道运行所受干扰的类型,建立姿态角,模态信息和扰动量为状态向量的状态方程,在部分模态信息和扰动信息未知的情况下,建立函数观测器重构这部分信息,根据误差系统,得到了观测器存在的充分条件,基于观测器输出的有用信息设计了具有状态反馈与前馈补偿两部分组成的控制器。本发明满足挠性航天器的控制需求,有效提升了航天器控制精度。


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    Title :

    Flexible spacecraft attitude maneuver control method based on observer


    Additional title:

    基于观测器的挠性航天器姿态机动控制方法


    Contributors:
    ZHANG LIU (author) / LIU QUANZHI (author) / FAN GUOWEI (author) / LYU XUEYING (author) / GAO YU (author) / XIAO YANG (author)

    Publication date :

    2022-11-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64G Raumfahrt , COSMONAUTICS



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