The invention belongs to the field of autonomous navigation and guidance control, particularly relates to an optimal step-by-step distribution control and optimization method and system for a deep space impactor, and aims to solve the problem that optimal attitude control is difficult to realize due to the fact that the instruction distribution state of a thrust chamber is fixed in an existing attitude control method. The method comprises the following steps: acquiring a to-be-controlled attitude angle of the deep space impactor; calculating an angular acceleration control vector of each thrust chamber of the deep space impactor as a first vector; calculating an angular acceleration control vector which can be realized by an attitude control device of the deep space impactor in combinationwith each first vector to serve as a second vector; calculating the projection length of each second vector projected to the instruction vector direction; selecting a second vector corresponding to the maximum projection length and turning on the switches of all thrust chambers in the thrust chamber combination corresponding to the second vector, so that attitude control over the deep space impactor is achieved. The optimal attitude control is realized by flexibly distributing the state of each thrust chamber of the deep space impactor.
本发明属于自主导航与制导控制领域,具体涉及一种深空撞击器的最优分步式分配控制及优化方法、系统,旨在解决现有姿态控制方法由于推力室指令分配状态固定,难以实现最优化姿态控制的问题。本发明方法包括:获取深空撞击器待控制的姿态角;计算深空撞击器的各推力室的角加速度控制矢量,作为第一矢量;结合各第一矢量,计算深空撞击器的姿控装置可实现的角加速度控制矢量,作为第二矢量;计算各第二矢量投影到指令矢量方向的投影长度;选取最大的投影长度对应的第二矢量,并将该第二矢量对应的推力室组合中的各推力室的开关打开,以实现深空撞击器的姿态控制。本发明通过灵活分配深空撞击器各推力室的状态,实现了最优化姿态控制。
Optimal step-by-step distribution control and optimization method and system for deep space impactor
深空撞击器的最优分步式分配控制及优化方法、系统
2020-09-18
Patent
Electronic Resource
Chinese
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