| 基于星敏感器的卫星角速度估计精度分析 |
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| 引用本文： | 李晓,赵宏,武延鹏,王立.基于星敏感器的卫星角速度估计精度分析[J].空间控制技术与应用,2012,38(3):16-20. |
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| 作者姓名： | 李晓 赵宏 武延鹏 王立 |
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| 作者单位： | 1. 北京控制工程研究所,北京,100190
2. 中国空间技术研究院,北京,100094 |
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| 摘 要： | 重点研究星敏感器自身特性对角速度估计精度的影响,分析了星敏感器动态情况下恒星矢量测量精度,推导出恒星矢量测量误差与星像目标中心提取误差之间的关系;进而研究了最小二乘角速度估计算法的精度,得出其精度影响因素:星像目标中心提取误差、曝光时间、恒星矢量数目及相互夹角;最后以给定的星敏感器参数和实际恒星分布进行数学仿真,验证了采用星敏感器估计角速度的可行性.
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| 关 键 词： | 星敏感器 最小二乘 角速度估计 |
Analysis on Accuracy of the Satellite Angular Rate Estimation Based on Star Sensor |
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| LI Xiao
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ZHAO Hong
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WU Yanpeng
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WANG Li.Analysis on Accuracy of the Satellite Angular Rate Estimation Based on Star Sensor[J].Aerospace Contrd and Application,2012,38(3):16-20. |
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| Authors: | LI Xiao ZHAO Hong WU Yanpeng WANG Li |
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| Institution: | 1.Beijing Institute of Control Engineering,Beijing 100190,China; 2.China Academy of Space Technology,Beijing 100194,China) |
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| Abstract: | The influence of star senor＇s characteristics on the accuracy of satellite angular rate estimation is emphatically studied.The relation between errors of star image centre extraction and accuracy of star vector measurement is analyzed.The accuracy of the least-square angular rate estimation is deduced,and then factors influence of error of star image centre extraction,the exposure time,the number of star vectors and their mutual angles on estimation accuracy.A simulation is set based on the given APS parameter and actual star distribution. |
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| Keywords: | star sensor least-squares angular rate estimation |
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