| 不规则小行星附着可达区生成方法 |
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| 引用本文： | 黄美伊,梁子璇,崔平远.不规则小行星附着可达区生成方法[J].宇航学报,2021,42(12):1550-1558. |
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| 作者姓名： | 黄美伊 梁子璇 崔平远 |
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| 作者单位： | 1.北京理工大学深空探测技术研究所，北京 100081；2. 深空自主导航与控制工信部重点实验室，北京 100081 |
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| 基金项目： | 国家重点研发计划项目（2019YFA0706500）；国家自然科学基金（62073034，61873302）；空间碎片专项(KJSP2020020302);中国科协青年人才托举工程（2019QNRC001） |
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| 摘 要： | 针对不规则小行星表面附着任务需求，提出了一种基于动态邻域搜索的可达区生成方法。首先，建立了可达区数学模型，并采用质心距映射函数对非定点附着的终端位置约束进行了处理。在此基础上，将可达区的优化问题转化为附着基准点计算、边界起始点计算和边界点搜索三个子问题。针对附着基准点与边界起始点，分别通过最小燃耗轨迹优化与极限燃耗轨迹优化求解；针对边界点，设计了导向式动态邻域搜索方法，将复杂的非定点着陆优化问题简化为定点着陆燃耗优化与边界插值。最后，以小行星433 Eros为对象，对所提出的可达区生成方法进行了仿真。结果表明，该方法能够生成不规则小行星表面的可达区，具有较高的搜索求解效率，并适用于不同的初始位置和燃耗条件。
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| 关 键 词： | 小行星附着 可达区 轨迹优化 邻域搜索 |
| 收稿时间： | 2021-02-26 |
Reachable Zone Generation for Irregularly Shaped Asteroid Landing |
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| HUANG Mei yi,LIANG Zi xuan,CUI Ping yuan.Reachable Zone Generation for Irregularly Shaped Asteroid Landing[J].Journal of Astronautics,2021,42(12):1550-1558. |
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| Authors: | HUANG Mei yi LIANG Zi xuan CUI Ping yuan |
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| Affiliation: | 1. Institute of Deep Space Exploration, Beijing Institute of Technology, Beijing 100081, China;2. Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration, Ministry of Industry and Information Technology, Beijing 100081, China |
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| Abstract: | A reachable zone generation method based on the dynamic neighborhood search is developed for landing on irregularly shaped asteroids. Firstly, the reachable zone is formulated, and a centroid distance mapping function is designed to constrain the terminal position of a trajectory with an unfixed landing point. On this basis, the reachable zone generation problem is decomposed into three sub problems: the reference point calculating, the starting point calculating, and the boundary points searching. The reference and the starting points are solved by a trajectory optimization for minimum fuel and maximum distance, respectively. The boundary points are calculated using a guided dynamic neighborhood search method, and in each search cycle, the minimum fuel is optimized with a fixed landing point. Finally, the proposed method is verified using the 433 Eros model. The results indicate that the method is effective in generating a reachable zone on an irregular surface, efficient in searching the boundary points, and applicable to various initial positions and fuel consumptions. |
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| Keywords: | Asteroid landing Reachable zone Trajectory optimization Neighborhood search |
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