一种同轨区域集中的北斗卫星自主导航算法  

A Coplanar Regional Centralized Autonomous Navigation Algorithm for Beidou Satellites

作　　者：林夏 林宝军[1,2,3,4,5] 刘迎春 白涛 武国强 LIN Xia;LIN Bao-jun;LIU Ying-chun;BAI Tao;WU Guo-qiang(Shanghai Engineering Center for Microsatellites,Shanghai 201203,China;Innovation Academy for Microsatellites of Chinese Academy of Sciences,Shanghai 201203,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;School of Computer Science and Technology,University of Chinese Academy of Sciences,Beijing 100094,China;School of Information,Shanghai Tech University,Shanghai 201210,China)

机构地区：[1]上海微小卫星工程中心,上海201203 [2]中国科学院微小卫星创新研究院,上海201203 [3]中国科学院空天信息创新研究院,北京100094 [4]中国科学院大学计算机科学与技术学院,北京100094 [5]上海科技大学信息学院,上海201210

出　　处：《宇航学报》2021年第1期113-121,共9页Journal of Astronautics

基　　金：中国科学院国防科技创新重点部署项目(KGFZD-135-18-008)。

摘　　要：基于北斗三号卫星配置规划,提出了一种同轨区域集中的北斗卫星自主导航算法。利用Ka星间链路指向切换灵活特性与激光链路高速通信特性,并克服激光终端异轨面通信困难,指向切换不便等缺陷,算法设计将轨道面内各卫星采集的Ka双向测距信息利用激光星间链路传入轨道面主卫星中,从而将测距信息集中处理并完成轨道面内各卫星的轨道信息更新。并且,本文还搭建了星内模拟仿真环境,对算法精度及性能进行验证。仿真结果表明,同轨道区域集中自主导航算法可在星内仿真环境中稳定运行,且其导航精度远优于分布式自主导航精度。Based on the configuration plan of BeiDou-3 satellites,a coplanar regional autonomous navigation algorithm for Beidou satellites is proposed.In the algorithm,the two-way Ka ranging information collected by the co-orbit satellites is designed to transmit to the main satellite by the laser inter satellite links and then with the ranging information,the main satellite can update the coplanar satellites’orbit information centralizedly.The algorithm takes full advantage of the flexible direction switching feature of Ka inter-satellite links and the high-speed communication feature of laser links and also overcomes the communication difficulties between different planes and direction switching weaknesses of the laser links.In addition,an intra-satellite simulation environment is built to verify the accuracy and feasibility of the algorithm.The simulation results show that the regional centralized autonomous navigation algorithm can stably run in the simulation environment,and its navigation accuracy is much better than that of the distributed autonomous navigation.

关 键 词：北斗卫星导航系统 星间测距 自主导航 用户等效距离误差(URE) 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]