集中式自主定轨算法在星载计算机集群上的并行实现  

Parallel implementation of centralized orbit determination algorithm on satellite computer clusters

作　　者：冯凌璇 林宝军 刘迎春[3,4] 林夏 FENG Lingxuan;LIN Baojun;LIU Yingchun;LIN Xia(Aerospace Information Research Insititute,Chinese Academy of Sciences,Beijing 100094,China;University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Academy for Microsatellites of Chinese Academy of Sciences,Shanghai 201210,China;Shanghai Engineering Center for Microsatellites,Shanghai 201210,China;Shanghai Technology University,Shanghai 201210,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学,北京100049 [3]中国科学院微小卫星创新研究院,上海201210 [4]上海微小卫星工程中心,上海201210 [5]上海科技大学,上海201210

出　　处：《电子设计工程》2022年第11期36-40,共5页Electronic Design Engineering

摘　　要：为解决单台星载计算机无法实现整网卫星集中式自主定轨计算并且分布式算法精度无法实现全网优化的问题,提出一种利用1553B总线连接的多台星载计算机并行处理实现自主定轨的方案,整网24颗MEO卫星的集中式自主定轨运算由连接同一总线的多个不同计算节点并行完成。仿真结果表明,并行优化后每台计算机内存占用可降低约50%,每19.738 s可以实现一次整网MEO卫星集中式定轨过程,30天定轨精度优于0.15 m,具有良好的工程可实现性。Due to the limit of satellite computer,centralized autonomous orbit determination can not be realized on single computer while the distributed algorithm can not achieve high orbit accuracy of the entire satellite network.In order to solve this problem,a centralized autonomous orbit determination parallel algorithm is proposed.In this algorithm,satellite and link data are dispersed to different computing nodes connected by 1553B bus.The centralized orbit determination of the entire network of 24 MEO satellites can be completed in parallel on satellites.The simulation results show that the memory usage of each computer can be reduced by about 50%,and every 19.738 s an orbit determination process for MEO satellites network can be completed.During this process,the average orbit determination accuracy of 30 days is better than 0.15 m,which shows that the parallel strategy is proved to have good engineering feasibility.

关 键 词：北斗三号 星载计算机 并行计算 自主定轨 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]