一种快速全天自主星图识别算法

摘要

三角形算法是目前实际工程上星敏感器广泛应用的星图识别算法，为了克服三角形识别算法中三角形因特征维数较低带来的冗余匹配问题，对该算法进行了改进。提出一种基于Stellarium软件实时生成模拟星图的方法，建立了星图识别算法仿真计算模型。仿真试验结果表明：利用Stellarium软件能够对星敏感器各种运行场景下的星图进行模拟，模拟要素完整、正确，在测试星图识别算法过程中能够满足星敏感器高精度实时仿真测试要求，为设备的调试、性能评估以及地面试验奠定基础。对全面测试星敏感器的软、硬件性能，及对星敏感器进行精确标定具有重要意义。%Triangle identification algorithm for star images has been widely used in attitude detection systems that take star sensor as navigation parts at present. An improved star identification algorithm based on the traditional triangle method is proposed in this paper to overcome the low character dimensions and high percentage of redundant matches in star identification.A real-time star image simulation method based on Stellarium software is proposed for the emula-tional test of star pattern recognition. The computation model for star image simulation is established. The simulation test results show that star image simulation for star sensor can be achieved under various operating conditions by using Stellarium software. The elements of simulation are completed and corrected. In the process of test star pattern recogni-tion algorithm can meet the requirements of star sensor and high precision real-time simulation test. The foundation for equipment debugging, performance evaluation and ground test are laid. There is great significance to fully test software and hardware performance of star sensor, and the star sensor precision calibration is.