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基于特征参数拟合的多地面目标双星星下点轨迹规划*

黄雄威1,2, 王蜀泉1, 张扬3, 何胜茂1,†   

  1. 1 中国科学院太空应用重点实验室,中国科学院空间应用工程与技术中心,北京,100094;
    2 中国科学院大学,北京,100094;
    3 中国科学院空天信息创新研究院,北京,100094
  • 收稿日期:2022-03-30 修回日期:2022-06-21 发布日期:2022-06-27
  • 通讯作者: †E-mail:heshengmao13@csu.ac.cn
  • 基金资助:
    *中国科学院青年创新促进会(2022126)资助

A trajectory planning based on characteristic parameters fitting for the multi-ground targets of the ground tracks of two satellites

HUANG Xiongwei1,2, WANG Shuquan1, ZHANG Yang3, HE Shengmao1   

  1. 1 Key Laboratory of Space Utilization, Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences. Beijing, 100094, China;
    2 University of Chinese Academy of Sciences. Beijing, 100094, China;
    3 Aerospace Information Research Institute, Chinese Academy of Sciences. Beijing, 100094, China
  • Received:2022-03-30 Revised:2022-06-21 Published:2022-06-27

摘要: 为了解决具有多次轨道机动能力、多探测目标、多探测器协同的对地观测任务的星下点轨迹规划问题,提出了一种基于特征参数拟合的星下点轨迹快速计算方法,并采用基于数据库的星下点轨迹拼接方法建立优化模型。首先,对描述星下点轨迹的特征参数进行分析和提炼,采用多项式对特征参数进行拟合实现快速计算;然后,根据探测目标建立观测码数据库,再进一步整理成轨迹数据库;最后,建立基于轨迹数据库的优化模型,解决整个星下点轨迹规划问题。对CTOC11的固定目标快速全覆盖任务进行仿真,能够在19.19天内完成该任务,结果表明本文所采用的设计方法和方案,可用于各类近圆轨道的星下点轨迹设计,这对于对地观测卫星的轨道设计具有重要意义。

关键词: 对地观测, 星下点轨迹, 特征参数拟合, 数据库, 轨迹规划, 全国空间轨道设计竞赛

Abstract: In order to solve the problems of the ground tracks of satellites for earth observation with multiple orbital maneuvering capabilities, multi-detection targets, and multi-detector coordination, a fast calculation method of the ground tracks of satellites based on characteristic parameter fitting is proposed. An optimization model is established based on the database about the splicing method of the ground tracks of satellites. Firstly, the characteristic parameters describing the ground tracks of satellites are analyzed and refined, and polynomials to fit the characteristic parameters are used to achieve fast calculation. Then an observation code database is established according to the detection target, and the database is further organized into a trajectory database. Finally, an optimization model based on the trajectory database is established to solve all problems on the ground tracks of satellites. The simulation of fast full coverage task for fixed target in CTOC11 can be completed within 19.19 days. The results show that the design method and scheme adopted in this paper can be used for the design of ground tracks of satellites in various near-circular orbits. It is of great significance for the orbital design of earth observation satellites.

Key words: earth observation, the ground tracks of satellites, characteristic parameter fitting, database, trajectory planning, CTOC

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