论文部分内容阅读
星敏感器是目前精度最高的姿态测量仪器,光学系统是其重要的组成部分。首先介绍星敏感器的工作原理,讨论星图识别过程中星像位置提取算法和星图识别算法,剖析光学系统的像差校正、成像特性要求。基于特殊的像质要求,兼顾优化速度,提出运用ZEMAX扩展外部编程以约束光线的优化设计方案。通过编写外部约束条件程序,使用动态数据交换技术实现外部程序和ZEMAX软件的通信,达到星敏感器光学系统的优化设计的目的。然后针对设计指标焦距f=43.56mm,入瞳直径D=27.3mm,全视场角为20°的APS星敏感器光学系统,采用该方案优化设计。得到的星敏感器光学系统,所有光学面都是球面,材料选用普通玻璃,具有像方远心的特点,系统成像质量满足星图识别要求。仿真表明:运用ZEMAX扩展外部编程优化设计星敏感器光学系统的方案快速有效。
Star sensor is the most accurate attitude measurement instrument, optical system is an important part of it. Firstly, the working principle of the star sensor is introduced. The star position extraction algorithm and the star image recognition algorithm in the process of star image recognition are discussed. The aberration correction and imaging characteristics of the optical system are analyzed. Based on special image quality requirements and taking into account the optimization speed, an optimized design scheme of using ZEMAX to extend external programming to restrain light is proposed. Through the preparation of external constraints procedures, the use of dynamic data exchange technology to achieve external programs and ZEMAX software communication, star sensor optical system to achieve the purpose of the optimal design. Then the APS star sensor optical system with the focal length f = 43.56mm, the entrance pupil diameter D = 27.3mm and the full field angle of 20 ° was designed and optimized. The resulting star sensor optical system, all optical surfaces are spherical, the material used ordinary glass, with the characteristics of square far center, the system image quality to meet the requirements of the map recognition. The simulation shows that the program of optimizing the design of star sensor optical system by using ZEMAX extended external programming is fast and effective.