一种基于相对位置约束的双星定位方法

发布时间：2018-06-02 09:56

本文选题：全球卫星定位系统 + 两颗可见星　；参考：《航空学报》2017年05期

【摘要】：全球卫星定位系统(GNSS)需要至少4颗卫星才能提供持续、准确的定位结果。在有障碍物遮挡的城市街道、山谷或者存在压制式干扰的战场环境中,往往会出现可见星数量降低至4颗以下的情况。针对只有2颗可见星的定位问题,提出了通过相对位置变化对绝对位置进行解算的定位模型,证明了该模型的可行性,并研究了该模型的数值计算方法和几何搜索方法。仿真实验和实际跑车试验表明,在只有2颗可见星条件下,该方法的定位精度明显优于传统的INS/GNSS紧组合算法,并且对初始位置的精度不具有依赖性。
[Abstract]:The global satellite positioning system (GNSS) requires at least 4 satellites to provide continuous, accurate positioning results. In urban streets, valleys, or suppressed jamming battlefield environments with obstructions, the number of visible stars is often reduced to less than 4. A needle is proposed for the location of only 2 visible stars. The positioning model of the relative position change to the absolute position is proved, and the feasibility of the model is proved, and the numerical calculation method and the geometric search method of the model are studied. The simulation experiment and the actual sports car test show that the positioning accuracy of the method is obviously superior to the traditional INS/GNSS compact combination algorithm under only 2 visible star conditions. And the accuracy of the initial position is not dependent.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;
【分类号】：TN967.1

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