月地转移轨道中途修正方法及策略

Method and Strategy of the Moon-to-Earth Trajectory Midcourse Correction

针对月地转移轨道中途修正,以再入角、再入点地心距和地面落点位置为目标,提出一种基于线性修正的固定落点中途修正方法。以一条半弹道式再入的月地转移轨道为例,采用该方法研究中途修正速度增量与修正时机的关系,并基于蒙特卡洛仿真对两次修正的中途修正策略进行验证。计算结果表明,文章提出的中途修正方法及策略能够满足月球采样返回任务对再入参数及落点位置的要求。

In order to target the reentry angle, the reentry height and the landing site location, a fixed landing site midcourse correction method based on the linear correction theory is developed for the moon-to-earth trajectory. Taking a moon-to-earth trajectory with the semi-ballistic reen- try for example, the relationship between the velocity increment and the midcourse correction op- portunity is researched. And the strategy with two midcourse corrections is validated by the Mont-Carlo simulation. The results suggest that the midcourse correction method and strategy in this paper can satisfy the reentry parameters and the landing site location requirements of the moon sampling return mission.