单星跟踪的组合天文定位算法

A combined celestial positioning algorithm based on single star tracking

针对机载平台下小视场天文导航定位高度差算法的应用缺陷,提出了一种基于单星跟踪的组合天文定位算法,并以此解决了当双星的方位张角接近180°时的天文定位问题:首先分析了机载平台下天文/惯性组合导航系统中的小视场天文定位的特点;然后阐述了组合天文定位算法的具体过程;最后建立了机载天文观测仿真模型。仿真结果表明该算法性能优良,能够有效减小天文定位算法对选星的依赖,拓宽天文定位算法的应用范围。

In view of the celestial positioning problem of multiple circle intersection iterative algorithm and height difference method on airborne platform,a combined combination celestial positioning algorithm with single star was proposed,with which the celestial positioning problem when the observation angle of two stars close to 180 degree was overcomed.Then the characteristic of traditional celestial positioning method was discussed and the theory of this algorithm was given in this work.Finally,an airborne celestial observation simulation model was established,and the simulation results demonstrated that the performance of this method would be excellent.What＇s more,the reliance on selection and combination of the stars could be reduced and the application of celestial positioning could be extended.