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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.
This paper focuses on the influence of the star sensor’s own characteristics on the angular velocity estimation accuracy, analyzes the star vector measurement accuracy under the dynamic condition of the star sensor, deduces the relationship between the star vector measurement error and the star image target center extraction error, Take the accuracy of the angular velocity estimation algorithm, we can get the factors that influence its precision: the center of the star image, the extraction error, exposure time, the number of stellar vectors and the angle between them; Finally, the mathematical simulation and verification of the given star sensor parameters and actual star distribution Feasibility of using star sensor to estimate angular velocity.