摘要
温度对星敏感器的测量精度有着重要影响。为提高星敏感器在不同温度条件下的测量精度,本文对星敏感器的温度误差进行了系统的分析和建模,提出了一种高精度的在线温度误差补偿方案。首先,通过分析温度对星敏感器光学系统的影响,分别得到了焦距漂移、光学畸变和温度之间的关系,建立了星敏感器系统的温度误差模型。其次,通过对CCD噪声特性的分析,给出了星位波动与温度的关系,建立了星敏感器的随机温度误差模型,并根据星敏感器系统温度误差和随机温度误差的特点,提出了一种高精度的在线温度误差补偿方案。最后,对CCD星敏感器进行仿真,结果表明,所提出的温度误差补偿方案能够有效地抑制星敏感器位置的漂移和波动,从而提高星敏感器在不同温度条件下的测量精度。
Temperature has a significant impact on measurement accuracy of star sensors.In order to improve the accuracy of star sensors in different temperature conditions,the temperature errors of star sensors are analyzed and modeled systematically,and a high-accuracy online temperature error compensation scheme is proposed in this paper.Firstly,by analyzing the temperature influences on the optical system of star sensors,the relationships between focal length drifts,optical distortion and temperature are obtained respectively,and then a systematic temperature error model of star sensors is established.Secondly,by analyzing the charge coupling device(CCD)noise characteristics,the fluctuation relationship between star positions and temperature is given,and a random temperature error model of star sensors is established.Then,according to the characteristics of systematic and random temperature errors of star sensors,a high-accuracy online temperature error compensation scheme is proposed.In the end,by the simulated CCD star sensor,it is indicated that the proposed temperature error compensation scheme can effectively restrain the shifts and fluctuation of star positions,and then can improve the measurement accuracy of star sensors in different temperature conditions.
作者
赵雨楠
王新龙
蔡远文
陈鼎
李群生
Zhao Yunan;Wang Xinlong;Cai Yuanwen;Chen Ding;Li Qunsheng(School of Astronautics,Beihang University,Beijing 100191,China;Department of Graduate School,Space Engineering University,Beijing 101416,China;State Key Laboratory of Space-Ground Integrated Information Technology,Beijing 100086,China;School of Instrumentation Science and Opto-Electronics Engineering,Beihang University,Beijing 100191,China)
出处
《航空兵器》
CSCD
北大核心
2020年第5期91-99,共9页
Aero Weaponry
基金
Supported by Natural Science Foundation of China(NSFC)(grant number 61673040)
the Aeronautical Science Foundation of China(grant number 2015ZC51038 and 20170151002)
the Project of the Experimentation and Technology Research(grant number1700050405)
Open Research Fund of State Key Laboratory of Space-Ground Integrated Information Technology(grant number 2015-SGIIT-KFJJ-DH-01)。
关键词
星敏感器
温度
系统误差
随机误差
在线补偿
star sensor
temperature
systematic error
random error
online compensation
