惯导姿态信息辅助快速星图识别

Fast star identification based on attitude information of INS

星图识别是将星敏感器当前视场中的恒星与导航星库中的参考星进行对应匹配，以完成视场中恒星的识别，是准确确定飞行器的空间姿态和位置的重要前提。为提高组合导航条件下星图识别的速度和鲁棒性，提出了一种在捷联惯性／星光组合导航系统中使用的快速星图识别方法。本方法的主要优点是利用惯导系统提供的星敏感器光轴大致指向，在局部天区利用T矢量方法进行星图识别。仿真试验结果表明所提方法是可行和有效的，能够提高识别速度和鲁棒性。

Star pattern recognition is the most important precondition for calculating attitude and position of spacecrafts, which matching observed stars with stars from guide stars catalog. In order to improve the velocity and robustness of star pattern recognition for INS/CNS combined navigation system, this paper proposed a fast star identification based on attitude information of INS. The main advantage of this method is that it can search guide star very quickly using T values in local celestial sphere based on point of light axis of star sensor provided by inertial navigation system. Simulation results demon-strate the feasibility and effectiveness of the proposed method and it can improve the velocity and robustness of star pattern recognition.