大角速度条件下星像运动轨迹建模及误差评估

doi:10.13700/j.bh.1001-5965.2018.0762

北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (8): 1653-1662.doi: 10.13700/j.bh.1001-5965.2018.0762

大角速度条件下星像运动轨迹建模及误差评估

何贻洋¹, 王宏力¹, 冯磊¹, 由四海¹, 陈志侃²

1. 火箭军工程大学导弹工程学院, 西安 710025;
2. 中国人民解放军66133部队, 北京 100144

收稿日期:2018-12-25 出版日期:2019-08-20 发布日期:2019-09-06
通讯作者: 冯磊 E-mail:fengl1983@126.com
作者简介:何贻洋男,博士研究生。主要研究方向:星光导航、星图处理;王宏力男,博士,教授,博士生导师。主要研究方向:复合制导以及故障诊断;冯磊男,博士,讲师。主要研究方向:图像处理、故障诊断和寿命预测。
基金资助:
国家自然科学基金（61503391）；中国博士后科学基金（2017M613372）

Star spot motion trajectory modeling and error evaluation under large angular velocity

HE Yiyang¹, WANG Hongli¹, FENG Lei¹, YOU Sihai¹, CHEN Zhikan²

1. Missile Engineering College, Rocket Force Engineering University, Xi'an 710025, China;
2. Unit 66133 of the PLA, Beijing 100144, China

Received:2018-12-25 Online:2019-08-20 Published:2019-09-06
Supported by:
National Natural Science Foundation of China (61503391); China Postdoctoral Science Foundation (2017M613372)

摘要/Abstract

摘要： 在大角速度条件下星敏感器成像平面上的星像会产生严重拖尾，影响星敏感器性能。为了全面认识星敏感器的星像运动轨迹形式，并定量评估星像运动对星点提取过程的影响，首先研究建立了星敏感器成像平面上星像运动轨迹的数学模型，推导出在成像平面上星像运动轨迹为一段圆弧；然后建立了星像运动时的能量分布模型，并对大角速度条件下基于质心法的星点坐标误差进行了评估，分析得到星点坐标误差的模近似可用星像运动轨迹长度的二分之一来衡量。仿真实验结果验证了所得结论的正确性。

关键词: 星敏感器, 运动模糊, 星点提取, 运动分解与合成, 误差评估

Abstract: Star spots obtained by the star sensor on the imaging plane will be seriously blurred under large angular velocity, which affects the performance of the star sensor. In order to fully understand the star spot motion blur trajectory and quantitatively evaluate the influence of the star spot motion blur on the star centroid extraction process, this paper firstly establishes the mathematical model of the star spot motion trajectory on the imaging plane. It is derived that the star spot motion blur trajectory on the imaging plane is a part of the circle during the exposure time. Then the energy distribution model of the blurred star spot is established and the star spot centroid coordinate error based on the centroid method is evaluated under the large angular velocity. It is analyzed that the modulus of the star spot centroid error can be approximated to one half of the length of the star spot motion blur trajectory. The simulation results verify the correctness of the conclusions obtained in this paper.

Key words: star sensor, motion blur, star spot extraction, motion decomposition and synthesis, error evaluation

中图分类号:

何贻洋, 王宏力, 冯磊, 由四海, 陈志侃. 大角速度条件下星像运动轨迹建模及误差评估[J]. 北京航空航天大学学报, 2019, 45(8): 1653-1662.

HE Yiyang, WANG Hongli, FENG Lei, YOU Sihai, CHEN Zhikan. Star spot motion trajectory modeling and error evaluation under large angular velocity[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2019, 45(8): 1653-1662.

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大角速度条件下星像运动轨迹建模及误差评估

Star spot motion trajectory modeling and error evaluation under large angular velocity

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