微型线阵式数字太阳敏感器技术研究

项目名称： 微型线阵式数字太阳敏感器技术研究

项目编号： No.61475012

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 樊巧云

作者单位： 北京航空航天大学

项目金额： 90万元

中文摘要： 微型太阳敏感器是现代微小卫星姿态测量的重要部件。本项目以低成本、中等精度微小卫星为应用背景，围绕微型线阵式数字太阳敏感器基础理论和关键技术展开系统深入的研究，主要研究内容有：运用视觉测量思想，设计V形透光狭缝的光学掩膜，使基于一维线阵图像传感器能测量太阳光在二维方向的入射角。基于现代光学镀膜技术，设计具有地球反照光和杂光抑制能力的掩膜膜系，提高太阳敏感器工作可靠性。研究高精度信息处理算法，实现姿态角的测算。提出两轴分离的误差模型，通过软件补偿的方式提高姿态测量精度。建立完善准确的测量模型，并基于内外参数统一建模的标定方法对模型中各参数精确标定。研制微型线阵式数字太阳敏感器原理样机，主要技术指标达到：重量小于30g，精度优于0.05 (1σ)，并具有0.6个太阳常数的地球反照光抑制能力。通过本项目研究，为低成本、中等精度微小卫星平台提供小型化、低成本、高可靠的太阳敏感器新产品。

中文关键词： 太阳敏感器；线阵式；小型化；光学测量

英文摘要： Micro sun sensor is an important component in attitude measurement for modern micro-satellite. Based on the demand of low cost, medium accurate micro-satellite, comprehensive and in-depth research on fundamental theories and key technology of linear-array micro sun sensor is carried out in this project. The main research contents are as following: With the help of vision measurement, designing a V shaped optical mask for linear-array image sensor to measure two-dimensional incident angle of sun light. Based on optical coating technology, designing a mask capable of reducing earthshine to improve the reliability of sun senor. Investigating the high precision information processing algorithm to calculate the altitude angle from output of image sensor. Establishing an error model for two axies separately, and improving the accuracy by software compensation. Establishing a complete and accurate measurement model, and proposing a calibration method for the parameters in the model through the unified modeling algorithm of internal-external parameter. Developing a prototype product of this linear-array micro sun sensor with the following key performance specification: weight less than 30 gram, precision better than 0.05(1σ) and can withstand earthshine less than 0.6 sun light intensity. The research of this project can provide a miniaturized, low cost, high reliability sun sensor for low cost, medium accurate micro-satellite.

英文关键词： sun sensor;linear array;miniature;optical measurment