摘要
随着星间链路(inter-satellite links,ISLs)的高速发展,星间链路技术能够有效提高全球卫星导航系统(global navigation satellite system,GNSS)的精度和自主运行能力,减少对地面站的依赖,是新一代导航系统的主要发展方向。基于星间建链约束和系统优化目标函数构建分布式优化问题,通过改进麻雀搜索算法(sparrow search algorithm,SSA)和剪枝策略进行高效求解,生成在轨卫星自主优化建链策略。所提算法能够有效克服固定建链和传统优化建链自主性差、鲁棒性弱的问题,在星座存在异常节点的情况下,性能基本维持不变,且在网络平均位置精度强弱度(position dilution of precision,PDOP)和平均境外-境内跳数上均有明显性能提升。
The inter-satellite links(ISLs)can effectively improve the accuracy and autonomous operation capability of the global navigation satellite system(GNSS)and reduce the dependence on ground stations,which is the main development direction of the new generation of GNSS.This paper constructs an optimization model and a distributed optimization framework based on the link planning constraints and the objective function of the ISL system.Subsequently,an improved sparrow search algorithm(SSA)with a pruning strategy is proposed to efficiently solve this problem,towards autonomous optimization of in-orbit satellite chain-building.Our proposed method can effectively overcome the problems of poor autonomy and weak robustness of the traditional fixed link planning method and the traditional heuristic algorithm.The performance of our method is unchanged in the presence of anomalous nodes in the constellation,and it has a significant performance improvement in both the position dilution of precision(PDOP)and the average number of hops from overseas satellite to domestic satellites.
作者
李黎
陈林
周彬
刘禹圻
姜博文
宋坤
LI Li;CHEN Lin;ZHOU Bin;LIU Yuqi;JIANG Bowen;SONG Kun(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,P.R.China)
出处
《重庆邮电大学学报(自然科学版)》
北大核心
2025年第6期903-910,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
