一种改进的基于K矢量的星图识别算法

A modified star map identification algorithm based on Kvector

为了提高星敏感器定姿中星图识别的精度和效率,基于K矢量原理和四边形匹配法则提出一种改进的星图匹配方法:首先基于K矢量查找法快速匹配星间角距,得到角距的匹配组合;再采用一种基于标识符的快速判别方法进行导航星的判别,得到4颗匹配成功的基准星;最后基于4颗基准星按四边形匹配法则完成全视场的匹配。实验结果表明,该方法具有良好的实时性和准确性。

In order to improve the accuracy and efficiency of identification of star map in the attitude determination of star sensors, the paper proposed a modified star map matching method based on K vector searching technique and quadrangle matching algorithm： firstly, the angular distance between stars and its range were matched with the K vector searching technique; secondly, a navstar identification algorithm was established to distinguish the navstar based on an algorithm of identifier, and then got 4 navstars; finally, the all field matching was accomplished with the 4 navstars based on quadrangle matching algorithm. Experimental result showed that the proposed method would have a good real-time performance and high accuracy.