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基于粒子群優(yōu)化的北斗多星定位方法
網絡安全與數(shù)據(jù)治理 6期
李浩,鄭睿
(1.安徽師范大學物理與電子信息學院,安徽蕪湖241002; 2.安徽省智能機器人信息融合與控制工程實驗室(安徽師范大學),安徽蕪湖241002)
摘要: 北斗衛(wèi)星導航系統(tǒng)是我國自主建設運行的衛(wèi)星系統(tǒng),向全球用戶提供高精度定位服務是其重要功能之一。為提高北斗系統(tǒng)的定位精度,一類可行的方法是偽距定位算法。針對常見的偽距算法存在依賴模型、計算復雜等問題,提出一種基于粒子群優(yōu)化的北斗衛(wèi)星定位方法。首先篩選出大氣折射誤差大、對定位貢獻小的冗余衛(wèi)星,由此獲取多顆可利用的北斗衛(wèi)星;在此基礎上,研究粒子群的初始群體和適應度函數(shù),通過粒子群算法得到優(yōu)化后的接收機位置。實驗結果表明,該方法可以快速搜索出優(yōu)化的位置;與常用的最大四面體法解算出的接收機位置相比較,定位精度可提高大約1.5 m。
中圖分類號:TN967.1
文獻標識碼:A
DOI:10.19358/j.issn.2097-1788.2023.06.015
引用格式:李浩,鄭睿.基于粒子群優(yōu)化的北斗多星定位方法[J].網絡安全與數(shù)據(jù)治理,2023,42(6):90-96.
Beidou multi-star positioning method based on particle swarm optimization
Li Hao,Zheng Rui
(1.School of Physics and Electronic Information, Anhui Normal University, Wuhu 241002, China; 2.Anhui Provincial Engineering Laboratory on Information Fusion and Control of Intelligent Robot (Anhui Normal University), Wuhu 241002, China)
Abstract: The Beidou navigation satellite system is a satellite system independently constructed and operated by China. Providing highprecision positioning services to global users is one of its important functions. In order to improve the positioning accuracy of the Beidou system,a kind of feasible method is pseudo range location algorithm. In this paper, a Beidou satellite positioning method based on particle swarm optimization is proposed. Firstly, redundant satellites with large atmospheric refraction errors and small contribution to positioning are selected, so as to obtain several available Beidou satellites. On this basis, the initial population and fitness function of particle swarm optimization are studied, and the optimal receiver position is obtained by particle swarm optimization algorithm. The experimental results show that this method can quickly search the optimal position. Compared with the receiver position calculated by the maximum tetrahedron method, the positioning accuracy can be improved by about 15 m.
Key words : Beidou satellite; location; particle swarm optimization; optimization

0    引言

北斗衛(wèi)星導航系統(tǒng)是目前獨立運行的全球四大衛(wèi)星導航系統(tǒng)之一,是中國獨立設計、自主發(fā)展、正在實施建設的衛(wèi)星導航系統(tǒng)。該系統(tǒng)可以廣泛應用于社會各個方面,為中國的交通運輸、災害預報、城市規(guī)劃、國防安全等諸多領域提供導航定位服務。隨著人們對導航定位精度的需求不斷提升,關于導航定位精度的研究成為導航領域研究的熱點。



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作者信息:

李浩1,2,鄭睿1,2

(1.安徽師范大學物理與電子信息學院,安徽蕪湖241002;2.安徽省智能機器人信息融合與控制工程實驗室(安徽師范大學),安徽蕪湖241002)

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