| 本文已被：浏览 3672次 下载 1412次 |
码上扫一扫！ |
|
|
| 一种基于恒星分布的星敏感器导航星库制作方法 |
|
叶志龙1,2, 孙朔冬1,2, 陈纾1,2, 吴迪1,2, 武斌1,2
|
|
1.上海航天控制技术研究所, 上海 201109;2.上海市空间智能控制技术重点实验室, 上海 201109
|
|
| 摘要: |
| 为了进一步提升星敏感器的定姿精度，分析了恒星的空间几何分布对姿态精度的影响，提出了一种基于恒星分布的星敏感器导航星库制作方法。在分析对比了现有星库的基础上，选择了精度较高的依巴谷星库作为基础星库，并剔除了暗星和双星以精简星库。遍历全天球对每个视场的星库中的空间几何分布进行分析对比，删除定姿较差的3颗星。对星库进行遍历补偿，保证了星库中恒星分布的均匀性。实验结果表明，全天球轨道测试中，本文方法制作星库的全天识别率为100%，且星颗分布数10颗以上天区占到97.64%，具有良好的覆盖性，同时有效提升了姿态精度。 |
| 关键词: 导航星库 恒星分布 姿态精度 星敏感器 |
| DOI：10.15982/j.issn.2095-7777.2018.01.013 |
| 分类号:V488.21 |
| 基金项目: |
|
| Establishment of a Navigation Star Database Based on Star Distribution |
|
YE Zhilong1,2, SUN Shuodong1,2, CHEN Shu1,2, WU Di1,2, WU Bin1,2
|
|
1.Shanghai Institute of Spaceflight Control Technology, Shanghai 201109, China;2.Shanghai Key Laboratory of Aerospace Intelligent Control Technology, Shanghai 201109, China
|
| Abstract: |
| In order to further improve attitude precision of star sensors, the influence of star spatial geometric distribution to attitude precision is analyzed and a method of establishing a navigation star database based on star distribution is proposed. On the basis of analyzing the current star database, Hipparcos is selected as the basic star database, while, dark-star and double-star are deleted in the star database, and then star spatial geometric distribution in every FOV (Field of View) is analyzed and compared while traversing all-sky, three stars which determine the worst attitude precision are deleted. Finally, Traversing compensationof star database is executed to ensure the uniformity of star distribution. The experimental results show that all-sky recognition rate is 100% by using the star database made by the proposed method in all celestial orbit tests, and the areas with more than 10 stars distribution r account for 97.64%. The porposed method is of good coverage, and can effectively improve the attitude accuracy. |
| Key words: navigation star table star distribution attitude precision star sensor |