多目标交会轨迹优化方法综述

多目标交会能有效降低单次任务的成本并提高任务收益,因此是未来小行星探测、在轨服务等任务的首选方案.该类任务的轨迹优化问题涉及的变量众多,解空间巨大,难以直接得到最优解.该问题的求解通常分为两步:首先优化交会序列,然后对于给定的交会序列,优化每段目标-目标转移的轨迹.优化交会序列时需对转移的速度增量或时间等代价进行快速、准确的估计.因此,多目标交会的轨迹优化可拆分为转移代价估计、交会序列优化、转移轨迹优化三个子问题.本文分别对这三个子问题的求解方法进行综述.

SURVEY OF MULTITARGET RENDEZVOUS TRAJECTORY OPTIMIZATION METHODS

Multitarget rendezvous can effectively reduce the cost of a single mission and increase the benefit, so it is the first choice for asteroid exploration, in orbit service and other missions in the future. The trajectory optimization problem of such missions involves many variables and huge solution space, so it is difficult to obtain the optimal solution directly. The solution of this problem is usually divided into two steps: first, the rendezvous sequence is optimized, and then, for a given rendezvous sequence, the trajectory of each target to target transfer is optimized. Fast and accurate estimation of the transfer cost such as velocity increment or transfer time is needed to optimize the rendezvous sequence. Thus, the trajectory optimization problem of multitarget rendezvous can be divided into three subproblems: transfer cost estimation, rendezvous sequence optimization, and transfer trajectory optimization. In this paper, the methods of solving these three subproblems are summarized.