• 论文 •

### 环月降轨实现月面着陆的控制策略

1. 1. 航天飞行动力学技术重点实验室, 北京 100094;
2. 北京航天飞行控制中心, 北京 100094
• 收稿日期:2019-04-18 发布日期:2020-01-21
• 通讯作者: 李革非 E-mail:sophiebacc@sina.com
• 作者简介:李革非,女,博士,研究员。主要研究方向:航天器动力学与控制。
• 基金资助:
国家自然科学基金（11773004，61573049）

### Control strategy of lunar orbit descent to achieve lunar landing

LI Gefei1,2, LIU Yong1,2, MA Chuanling2, HAO Dagong2

1. 1. Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing 100094, China;
2. Beijing Aerospace Control Center, Beijing 100094, China
• Received:2019-04-18 Published:2020-01-21
• Supported by:
National Natural Science Foundation of China (11773004,61573049)

Abstract: Aiming at the problem of the probe's lunar landing, the control strategy of lunar orbit descent is studied. According to the control equations of the lunar orbit descent, the three kinds of relationship between the different combinations of the single-pulse control variables of the lunar orbit descent and the parameters of the lunar landing target are established. Three control strategies for lunar orbit descent, which are the fixed-point landing at the fixed time, the fixed-point landing and the landing at the target latitude area, are established. The algorithms and the procedures for solving the lunar orbit descent control strategies are presented. For the fixed-point lunar landing, the solutions of the single-pulse combined control of the semi-major axis and the lunar perigee height are analyzed. The control calculations of three kinds of lunar landings with the fixed-point at fixed time, the fixed-point, and the target latitude area are carried out respectively for the nominal orbit, the negative deviation orbit, and the positive deviation orbit, and the control strategies of the lunar orbit descent are verified. The strategies can be applied to the orbit control of the lunar landing mission, such as lunar landing, lunar sampling return, and manned lunar landing.