基于太阳电池板与磁强计的小卫星姿态确定算法研究  

An Algorithm for Micro-Satellite Attitude Determination Using Solar Panels and Magnetometer

作　　者：刘建业[1] 段方[1] 李丹[1] 郁丰[1] 

机构地区：[1]南京航空航天大学导航研究中心,南京210016

出　　处：《宇航学报》2007年第1期218-222,共5页Journal of Astronautics

摘　　要：直接将太阳电池板电流作为量测量进行姿态确定,不仅可观性不高,也不利于计算量的减少。分析了利用太阳电池板测姿的原理;以立方体微小卫星为例,分析了由多个太阳电池板电流估计太阳矢量的问题,提出了受限最小二乘法。将所估计的太阳矢量与磁强计输出结合,进行双矢量定姿滤波。利用软件STK(Satellite ToolKit)数据对算法进行了仿真,与直接将太阳电池板电流作为量测值的算法进行了对比。结果表明:该算法有效地提高了定姿性能。If the current generated by solar panels are used as measurements for attitude determination, not only the observability is low, but also it is disadvantageous to the decrease of computation. In this paper, the principle of the attitude determination using solar panels was analyzed. Taking the hexahedral micro-satellite as an example, the solar vector estimation problem based on current generated by solar panels was analyzed, and the limited least-square method was proposed. By combining the estimated solar vector with the magnetometer output, the double-vector attitude determination filtering was proceeded. The algorithm was simulated based on STK（ Satellite Tool Kit） data, and the results were compared with those got from the algorithm which using the current generated by solar panels as measurement directly. The results show, the proposed algorithm improves the performance of attitude determination effectively.

关 键 词：小卫星 太阳电池板 磁强计 姿态 卡尔曼滤波 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]