New star pattern recognition approach based on Hausdorff distance
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摘要: 提出了一种新的星图识别方法,这种方法的基本思想是首先从星敏感器中提取全部星图信息,把提取的星图组成一个待识别数据集合B,把全星图参考星库作为一个标准数据集合A,然后,计算2个数据集合A,B之间的相对Hausdorff距离,根据最小相对距离得到待识别星的位置,其中A, B分别由矢量坐标a,b构成.与传统的星光角距识别方法不同,这种方法充分利用了星敏感器中的所有星的空间结构信息,所以,它对各种噪声干扰具有很强的鲁棒性.半物理仿真实验结果表明,在具有强的随机噪声、星图畸变和一定数目的流星干扰情况下,这种方法具有很好的识别效果.
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关键词:
- 航天器 /
- 天文导航 /
- 星敏感器 /
- Hausdorff距离 /
- 星图识别
Abstract: A new star pattern recognition approach has been devoloped. Its based idea was first extraction the star pattern information, fitting together the information to a pending data set B, putting all star catalog information into a criterion data set A, then computing the relative Hausdorff distance of two sets, here a and b is a vector element of set A and set B. The star was recognised according to the minimum Hausdorff distance. The approach is different from the conventional star pattern recognition approach, which uses the starlight angle-distance method to get the position, it takes the most of the information of star dimensional configuration, therefore, the approach has strong robusticity for the disturbance of noise, distortion, and a few meteor. In the case of random noise,imaging distortion, and a few meteor disturbing, the half physics simulation experimential result indicates that the approach has good recognition effect.-
Key words:
- spacecraft /
- celestial navigation /
- star sensor /
- Hausdorff distance /
- star parttern recognition
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