几何定位应用中恒星三角形识别简化算法

为了满足几何定位应用对恒星识别的需求，从导航星的选取、导航特征库的构造及识别算法的实现等方面对传统三角形识别算法进行改进。首先，结合几何定位传感器跟踪恒星的特性，提出导航星的快速选取方法。接着建立以星对角距和星对星等差为特征量的导航星特征库。然后，在改进的三角形识别算法的基础上，对观测三角形特征向量进一步简化。最后，在几何定位的应用场景中对传统三角形识别算法、三角形识别简化算法进行仿真比较。实验结果表明：在几何定位的应用场景中，三角形识别简化算法识别成功率、识别效率较高。能够满足几何定位应用对恒星识别算法效率、可靠性的要求。

Simplification of star triangle identification algorithm for geometrical location

In order to meet the requirement of geometrical location for star identification ,the traditional triangle identification algorithm is modified in selection of guide star , construction of database of star characteristic and algorithm implementation .First ,based on the sensor feature in geometrical location ,rapid star selection algorithm is proposed .The database of star characteristic including star pairs angular distances and magnitude difference is constructed .Then ,based on the modification of triangle identification ,observation triangle feature vectors are simplified .Finally ,in the scenario of geometrical location ,traditional triangle iden‐tification algorithm ,and simplification of triangle identification algorithm are simulated and compared .The simulation results show that the simplification of triangle algorithm can lower the mismatches probability , increase the speed of identification ,and can meet the star identification algorithm’s demand for efficiency and reliability .