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星敏感器离焦像点半径最优值的确定方法

Method for Determining Optimal Radius Value of Defocused Image Spot of Star Sensor

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摘要

分析了不同离焦像点半径及不同噪声强度下的星敏感器质心定位误差,建立了质心定位误差关于离焦像点半径和噪声强度的函数模型,在质心定位精度确定的条件下得到了离焦像点最优高斯半径与背景噪声强度的一元函数关系。仿真实验表明,在给定的质心定位精度下,最优高斯半径与噪声强度近似服从抛物线关系,统计出噪声强度后即可得到最优的像点高斯半径值。

Abstract

In this paper, the centroid localization error of a star sensor with regard to the radius of defocus image spot and noise intensity is analyzed. The functional model for the optimal Gaussian radius about the two variables, standard deviations of centroid localization error, and noise intensity are established. Under the condition that the centroid localization precision is determined, the one-variable-function relationship between the optimal radius value of defocused Gaussian image spot and the background gray-noise intensity can be obtained. The simulation experimental results show that under the given centroid localization precision, the relationship between the optimal Gaussian radius and the noise intensity follows a functional curve, such as a parabola. After the noise intensity is determined by statistics, the optimal Gaussian radius of image spot can be obtained.

Newport宣传-MKS新实验室计划
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中图分类号:V448.22

DOI:10.3788/lop56.101101

所属栏目:成像系统

收稿日期:2018-11-26

修改稿日期:2018-12-05

网络出版日期:2018-12-07

作者单位    点击查看

王海涌:北京航空航天大学宇航学院, 北京 100191
王腾飞:北京航空航天大学宇航学院, 北京 100191
朱宏玉:北京航空航天大学宇航学院, 北京 100191
刘涛:北京航天万源科技有限公司, 北京 100176
葛成军:北京航天万源科技有限公司, 北京 100176

联系人作者:王腾飞(oktengfei@126.com)

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引用该论文

Wang Haiyong,Wang Tengfei,Zhu Hongyu,Liu Tao,Ge Chengjun. Method for Determining Optimal Radius Value of Defocused Image Spot of Star Sensor[J]. Laser & Optoelectronics Progress, 2019, 56(10): 101101

王海涌,王腾飞,朱宏玉,刘涛,葛成军. 星敏感器离焦像点半径最优值的确定方法[J]. 激光与光电子学进展, 2019, 56(10): 101101

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