摘要
研究对空间目标近距离顺光抵近与顺光构型维持的脉冲控制问题.顺光抵近指航天器保持位置近似位于目标—太阳连线上,对目标实施抵近操作.建立航天器与目标间的近距离相对运动动力学,从几何上定义顺光走廊的概念.通过一种将路径约束转化为点约束的技巧,构建描述顺光抵近过程最优脉冲控制策略的非线性规划(NLP)模型,对模型进行求解获得时间约束下脉冲消耗最小的抵近控制策略.进一步分析目标轨道坐标系下的目标—太阳连线长期变化规律,并提出一种基于控制时刻与控制位置点采样,以及动力学拟合的顺光构型维持脉冲控制方法.数值仿真验证结果表明所提出的顺光抵近与维持控制策略,能够实现航天器在满足顺光走廊约束的前提下完成对目标的顺光抵近与顺光构型维持任务.
This paper investigates the impulsive control of spacecraft for close-proximity approach and maintenance along the sunlight.The concept of approach along the sunlight means that a spacecraft approaches a target,with its position kept on the line connecting the target and the Sun.Firstly,the close-proximity relative dynamics is established between the spacecraft and the target.Then the geometrical definition of the sunlight corridor is presented.By transforming the path constraint to the position constraint,a nonlinear programming(NLP)model is developed to describe the optimal impulsive control for the approaching.The time-constrained fuel-optimal strategy is obtained through solving the NLP model.In addition,the long-term variations of the line connecting the target and the Sun are analyzed in the target’s local vertical local horizontal(LVLH)coordinate frame.And an impulsive control strategy is proposed for position maintenance along the sunlight,which is based on the sampling of impulse epochs and positions as well as the dynamical fitting technique.Finally,numerical simulations are conducted to verify the proposed control strategies.The results indicate that the spacecraft can successfully conduct the approach and maintenance,with the sunlight corridor constraint satisfied.
作者
陆鹏飞
王悦
石恒
汤亮
LU Pengfei;WANG Yue;SHI Heng;TANG Liang(School of Astronautics,Beihang University,Beijing 102206,China;Beijing Institute of Control Engineering,Beijing 100094,China;Science and Technology on Space Intelligent Control Laboratory,Beijing 100094,China)
出处
《空间控制技术与应用》
CSCD
北大核心
2023年第3期74-84,共11页
Aerospace Control and Application
基金
国家自然科学基金资助项目(11872007)
空间智能控制技术实验室开放基金课题(6142208190306)
中央高校基本科研业务费专项基金资助项目。
关键词
顺光抵近
顺光维持
脉冲控制
非线性规划
动力学拟合
approach along the sunlight
maintenance along the sunlight
impulsive control
nonlinear programming
dynamical fitting
