| 甚高精度星敏感器测试用静态星模拟器设计 |
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| 引用本文： | 陈启梦,张国玉,王哲,王凌云,高玉军.甚高精度星敏感器测试用静态星模拟器设计[J].红外与激光工程,2014,43(6):1830-1835. |
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| 作者姓名： | 陈启梦 张国玉 王哲 王凌云 高玉军 |
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| 作者单位： | 1.长春理工大学光电工程学院,吉林长春 130022; |
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| 摘 要： | 为了完成甚高精度星敏感器的地面测试任务，设计高精度静态多星模拟器，实现对星点位置的准确模拟。设计的准直光学系统光谱范围为500~900 nm，在20℃时，系统焦距为150 mm，全视场7.2内畸变小于0.02%，MTF 达到衍射极限。对于-45℃~65℃的工作温度变化，分别使用Zemax 和ANSYS 软件对模拟器光学系统、机械结构进行消热差和有限元分析。分析结果表明:模拟器的光学系统消热良好，机械结构变形及应变很小，其整体抗离焦性能满足设计要求。对模拟器的精度进行理论计算，用徕卡经纬仪测试指定星图，计算结果显示实测的单星位置误差小于3，星对角距误差小于5，均优于对敏感器标定的精度指标要求。
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| 关 键 词： | 星模拟器 光学系统设计 热性能分析 高精度 |
| 收稿时间： | 2013-10-10 |
Design of static star simulator based on testing of very high precision star sensor |
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| Affiliation: | 1.The School of Electro-optical Engineering Changchun University of Science and Technology,Changchun 130022,China;2.Jilin Engineering Research Center of Photoelectric Measurement & Control Instruments,Changchun 130022,China;3.Changchun Institute of Optics,Fine Machines and Physis,Chinese Academy of Sciences,Changchun 130033,China |
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| Abstract: | In order to complete the testing of very high precision star sensor, a high precision static multi-star simulator which can achieve accurate simulation of star point was designed. The collimating optical system has wavelength range of 500-900 nm, at 20℃, the effective focal length of 150 mm, and distortion less than 0.02%, MTF reaches diffraction limit within the full filed of view of 7.2. For temperature changes from -45℃ to 65℃, used ZEMAX software to analyze athermal performance of the optical system, applied ANSYS software to complet finite element analysis of the mechanic structure. The results show that, athermal performance of the optical system is fine, shape change and deformation stress on mechanical structure are small, the anti-defocus performance of the simulator can meet the requirement of technique index. Calculate theoretical accuracy of the designed simulator and provided a group of measured data. Depends on the measurement results, the error of position for single star 3, the error of angular distance between stars 10, are both better than required calibration accuracy of the star sensor. |
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