基于改进的NSGA-Ⅱ算法的低轨星座设计
LEO constellation design based on improved NSGA-Ⅱ algorithm
刘涵 1刘泽伟 1郭辉 1夏宇垠 1董乔忠1
作者信息
- 1. 中国航天科工集团8511研究所,江苏 南京 210007
- 折叠
摘要
GNSS卫星轨道高度高,信号经空间传播损耗严重,因此存在易受干扰和遮挡等问题.低轨卫星可以很好地弥补这一缺点,作为GNSS的备份或补充手段提供定位导航服务.考虑到自主设计的星座可以更好地满足数据传输、覆盖范围等方面的要求,研究了基于优化算法的低轨星座设计.首先根据应用需求初步对轨道高度、倾角以及星座构型等关键因素进行约束;然后通过改进的NSGA-Ⅱ算法对星座的参数进行优化,设计一个可以实现全球导航增强的LEO星座;最后通过仿真对星座的性能进行全面的分析,验证其导航增强的效果.
Abstract
GNSS satellites have a high orbital altitude and severe signal loss through space transmission,so they tend to be interfered and shielded.LEO satellites can compensate for this shortcoming and provide position-ing and navigation services as a backup or supplement to GNSS.The independently designed constellation can better meet the requirements of data transmission,coverage,and other aspects.The design of LEO constella-tions is studied based on the optimization algorithm.Firstly,the key factors such as orbit altitude,inclination,and constellation configuration are constrained according to application requirements.Then,the parameters of the constellation are optimized by the improved NSGA-Ⅱ(INSGA-Ⅱ)algorithm,and an LEO constellation that can realize the global navigation enhancement is designed.Finally,the performance of the constellation is ana-lyzed comprehensively through simulation,and the effect of navigation enhancement is verified.
关键词
优化算法/改进的NSGA-Ⅱ/星座设计/导航增强Key words
optimization algorithm/improved NSGA-Ⅱ/constellation design/navigation enhancement引用本文复制引用
出版年
2024
NETL
NSTL
万方数据