| 星敏感器光轴测量的锥面误差模型及其应用 |
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| 引用本文： | 矫媛媛,周海银,李新娜,王炯琦,潘晓刚.星敏感器光轴测量的锥面误差模型及其应用[J].宇航学报,2010,31(9). |
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| 作者姓名： | 矫媛媛 周海银 李新娜 王炯琦 潘晓刚 |
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| 作者单位： | 1. 国防科技大学理学院数学与系统科学系,长沙,410073
2. 国防科技大学理学院数学与系统科学系,长沙410073;空间智能控制技术国家级重点实验室,北京100190 |
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| 摘 要： | 星敏感器是卫星高精度姿态测量系统中的重要器件,根据其测量可以建立不同形式的星敏感器测量模型,准确分析测量模型中测量误差的特性是保证卫星姿态确定精度的重要条件。本文针对广泛采用的星敏感器光轴矢量测量方程,从几何角度出发,结合实际情况,提出了一种新颖的星敏感器光轴测量的锥面误差模型。在两个锥面参数分别服从一定的概率分布的条件下,对测量误差特性进行了深入分析,确定出新的测量误差协方差矩阵。上述研究能够在不增加算法计算量的前提下,从新的角度,更为直观地建立了星敏感器光轴矢量测量模型。最后在仿真实验中,将新的锥面误差测量模型应用于基于扩展卡尔曼滤波(EKF)的姿态确定方法中,结果表明了利用该测量模型进行姿态确定的有效性。
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| 关 键 词： | 星敏感器 锥面误差模型 测量误差特性 姿态确定 |
Cone Measurement Error Model of Star-sensor's Optic Axis and Its Application |
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| JIAO Yuan-yuan,ZHOU Hai-yin,LI Xin-na,WANG Jiong-qi,PAN Xiao-gang.Cone Measurement Error Model of Star-sensor''s Optic Axis and Its Application[J].Journal of Astronautics,2010,31(9). |
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| Authors: | JIAO Yuan-yuan ZHOU Hai-yin LI Xin-na WANG Jiong-qi PAN Xiao-gang |
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| Institution: | JIAO Yuan-yuan1,ZHOU Hai-yin1,2,LI Xin-na1,WANG Jiong-qi1,PAN Xiao-gang1(1.Department of Mathematics and System Science,National University of Defense Technology,Changsha 410073,China,2.National Laboratory of Space Intelligent Control,Beijing 100190,China) |
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| Abstract: | Star sensor is one of the most important sensors in satellite attitude measurement system.There are different kinds of star sensor's measurement models in application,and the exact measurement error model is essential for the accuracy of attitude determination.In this paper,a cone measurement error model for measurement vector of star sensor's optic axis is established based on the reasonable assumption.According to the cone parameters,the characteristics of the measurement error is analyzed and the new mea... |
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| Keywords: | Star sensor Cone measurement error model Characteristics of measurement error Attitude determination |
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