多曝光星敏感器的全运动参数建模及优化设计

于文波; 武佩; 宣传忠; 张春慧; 江洁

doi:10.13700/j.bh.1001-5965.2020.0364

多曝光星敏感器的全运动参数建模及优化设计

doi: 10.13700/j.bh.1001-5965.2020.0364

1.
内蒙古农业大学机电工程学院, 呼和浩特 010018
2.
北京航空航天大学仪器科学与光电工程学院, 北京 100083

基金项目:

内蒙古农业大学高层次人才引进科研启动项目 NDYB2018-16

国家自然科学基金 62005135

国家自然科学基金 61725501

详细信息

通讯作者:
江洁, E-mail: jiangjie@buaa.edu.cn

中图分类号: V448.2
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- 被引次数: 0
出版历程
- 收稿日期: 2020-07-28
- 录用日期: 2020-10-10
- 网络出版日期: 2021-10-20

Complete motion parameters modeling and optimization design of multiexposure star tracker

1.
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
2.
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100083, China

Funds:

Start Up Project of Introducing High Level Talents in Inner Mongolia Agricultural University NDYB2018-16

National Natural Science Foundation of China 62005135

National Natural Science Foundation of China 61725501

More Information

Corresponding author: JIANG Jie, E-mail: jiangjie@buaa.edu.cn

摘要

摘要:
多曝光成像方法是一种有效提升星敏感器姿态更新率的技术，但该方法随着运动角速度及角加速度增大，相邻星点轨迹的交叉概率显著增大，严重影响其提升性能。为了解决上述问题，建立了基于星敏感器全运动参数的星点成像位置模型，并据此确定了星点在工作周期内的运动位移。根据该模型，对交叉概率与全运动参数、焦距、星点位置等的关系进行了仿真，并确定了全运动参数的极限安全值为角速度ω≤26.4（°）/s，角加速度α≤5（°）/s²。外场观星实验充分验证了所提方法的有效性。
- 多曝光星敏感器 /
- 全运动参数建模 /
- 优化设计 /
- 仿真分析 /
- 外场实验
Abstract:
The multiexposure imaging method can be utilized to improve the attitude update rate of the star tracker effectively. However, with the increase of the angular velocity and angular acceleration, the cross probability of adjacent star tracks increases significantly, thus seriously affecting the performance of multiexposure imaging method. In order to solve the above problem, first, the star imaging position model based on the complete motion parameters of star tracker is established, and the movement displacement of the star point in the working period is determined accordingly. Then, according to the above model, the relationship between the cross probability and the parameters such as complete motion parameters, focal length and star position, is simulated quantitatively, and the limit safety values of complete motion parameters are determined as angular velocity ω ≤ 26.4(°)/s and angular acceleration α ≤ 5(°)/s². Finally, a star observation field experiment is carried out to further verify the effectiveness of the proposed method.
- multiexposure star tracker /
- complete motion parameters modeling /
- optimization design /
- simulation analysis /
- field experiment

HTML全文

图 1 不同曝光工作模式下的星敏感器流水线示意图

Figure 1. Schematic diagram of workflow of star trackers in different exposure modes

下载: 全尺寸图片幻灯片

图 2 单颗导航星多曝光成像示意图

Figure 2. Schematic diagram of multiexposure imaging of single guide star

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图 3 交叉概率随角速度ω_x变化

Figure 3. Cross probability versus angular velocity ω_x

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图 4 交叉概率随角加速度α_x变化

Figure 4. Cross probability versus angular acceleration α_x

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图 5 交叉概率随角速度ω_z变化

Figure 5. Cross probability versus angular velocity ω_z

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图 6 交叉概率随角加速度α_z变化

Figure 6. Cross probability versus angular acceleration α_z

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图 7 夜晚外场观星实验装置示意图

Figure 7. Night star observation out-field experiment setup

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图 8 不同多曝光次数的成像星图

Figure 8. Star images with different multiexposure times

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表 1 星敏感器部分仿真参数

Table 1. Part of simulation parameters of star tracker

参数	数值
周期Δt/ms	100
分辨率A×A/(像素×像素)	2 048×2 048
像素尺寸a×a/(μm×μm)	5.5×5.5
极限星等(静态)/Mv	6.0

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参考文献(15)

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