基于因子图协同定位辅助的单星定位方法

发布时间：2018-03-20 07:00

本文选题：单星定位　切入点：协同定位　出处：《系统工程与电子技术》2017年05期 　论文类型：期刊论文

【摘要】：在诸如行星探测,战争损毁等导航星座拒止环境下,单星定位系统可以快速部署为目标提供定位支持,但单星定位系统较大的定轨误差导致定位误差较大。针对上述问题,提出了一种基于因子图协同定位辅助的单星定位方法。首先,通过多组卫星不同时刻的伪距差值构建定位双曲面为定位目标提供连续定位并减小卫星和接收机钟差的影响;其次,利用多个定位目标之间的高精度测距信息建立协作因子图,并利用该协作因子图辅助单星定位系统的定位结果,从而提高定位精度。将所提出的单星定位方法与现有的多普勒单星定位方法和径向加速度单星定位方法从卫星定轨误差、测距误差和定位误差3方面进行对比。仿真结果表明,所提出方法的定位误差仅为其他两种方法的1%~10%。
[Abstract]:In an environment where navigation constellations such as planetary exploration and war damage are rejected, single satellite positioning systems can be deployed rapidly to provide positioning support for targets, but large orbit determination errors of single satellite positioning systems lead to larger positioning errors. A single satellite location method based on factor map co-location assistance is proposed. Firstly, the hyperboloid is constructed by pseudo-range difference at different time to provide continuous positioning and reduce the influence of satellite and receiver clock error. Secondly, the cooperative factor map is established by using the high-precision ranging information between multiple targets, and the location results of the single satellite positioning system are aided by the cooperative factor map. In order to improve the positioning accuracy, the proposed single satellite positioning method is compared with the existing Doppler single satellite positioning method and radial acceleration single satellite positioning method in three aspects: satellite orbit determination error, ranging error and positioning error. The simulation results show that, The positioning error of the proposed method is only 1 / 10 of the other two methods.
【作者单位】：西北工业大学电子信息学院;西北工业大学航海学院;
【基金】：国家自然科学基金(61501430)资助课题
【分类号】：TN967.1

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