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基于B平面参数的行星际小推力轨道制导策略

Keywords: 小推力,B平面,预测制导,微分校正,蒙特卡洛仿真

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Abstract:

针对行星际小推力转移轨道制导问题,提出了一种基于目标B平面参数的预测制导方法.在对推力控制量进行分段参数化基础上,采用序列二次规划算法获得标称转移轨道;然后将分段控制函数系数作为制导参数,以B平面参数为目标约束,通过线性化处理建立目标B平面参数与离散制导参数间的映射关系.基于微分校正思想,采用分段逐次修正策略实现了制导参数的修正.以火星探测任务为例,基于蒙特卡洛仿真对本文方法进行了数值验证,结果表明:相比轨道参数方法,利用B平面参数方法的轨道修正次数更少,且制导精度高.

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