N形缝光线引入器太阳敏感器技术研究  

Development of Digital Sun Sensor with an N-Shaped Slit Mask

作　　者：卫旻嵩 邢飞[1,2] 李滨[1,2] 尤政[1,2] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084 [2]清华大学精密测试技术及仪器国家重点实验室,北京100084

出　　处：《宇航学报》2013年第10期1323-1329,共7页Journal of Astronautics

基　　金：国家自然科学基金(60807004);国家863计划(2012AA121503)

摘　　要：为适应微小卫星发展的需求,提出了基于线阵电荷耦合器(Charge-Coupled Devices,CCD)的N字形狭缝数字太阳敏感器研究方案,以减小系统功耗并降低系统复杂度。该方案通过采用带有N字形狭缝的光线引入器以及单个线阵CCD作为光线探测器,实现了太阳敏感器对两轴太阳角的精确计算。提出利用迭代算法和修正系数对系统折射误差进行修正的方法,进一步结合质心算法,能够快速准确修正系统误差,提高系统精度和分辨率。N型数字太阳敏感器视场角可达(±60°)×(±60°),在整个视场范围内定姿精度优于0.1°,功耗300mW。该数字太阳敏感器具有低功耗、大视场角和高精度的特点,设计、算法均大大简化,实现了太阳敏感器的微型化,在各种微小卫星上有广阔的应用前景。With the development of microsatellite, a design of N-shaped slit based on a linear array charge-coupled device （CCD） for the digital sun sensor is proposed to save power consumption and simplify the system. Accurate measurement of biaxial sun angles is achieved by using a mask with an N-shaped slit and a single linear CCD as the light detector. An iterative algorithm with a correction coefficient is introduced for fast correction of the system refraction error, and a centroiding algorithm is utilized to improve the system accuracy and resolution. The test experiment shows that the digital sun sensor with an N-shaped slit has （ ± 60°）° （ ±60°） field of view and 0.1°angle estimation accuracy in the whole field of view and consumes 300mW. This digital sun sensor is miniature and has the characteristics of low-power, wide field of view and high accuracy, while both design and algorithm are significantly simplified; it indicates a broad application in all kinds of microsatellites.

关 键 词：太阳敏感器 N字形狭缝 光线引入器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]