Novel method of multiple-satellite faults exclusion for global navigation satellite system
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摘要: 在全球导航卫星系统中,多颗卫星同时发生故障的概率会随着观测卫星数的增加而增加,从而,在接收机自主完好性监测中需考虑多星故障的处理.针对故障检测比故障排除简单、且故障检测率比故障排除率高的特征,以故障检测为基础,提出了一种新的多星故障排除方法——随机搜索法.该方法采用二进制对观测卫星进行编码,通过随机初始化方式获得初始无故障星座,再通过逐步搜索未选卫星方式来得到最终的含有最多无故障卫星的星座,实现故障排除功能.仿真结果表明:大部分情形下,新方法能获得99%以上的故障排除率,既能进行单星故障排除,也能进行多星故障排除,能有效满足全球导航卫星系统关于自主完好性的要求.
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关键词:
- 卫星导航 /
- 故障排除 /
- 故障检测 /
- 接收机自主完好性监测
Abstract: In global navigation satellite system (GNSS), with the increase in the number of observational satellites comes an increase in the probability of simultaneous multiple-satellite faults. Therefore, the multiple-satellite faults should be taken into account in receiver autonomous integrity monitoring (RAIM). The approach of fault detection is simpler than that of fault exclusion and the fault detection rate (FDR) is higher than the fault exclusion rate (FER), considering the features of satellite navigation system, a novel multiple-satellite faults exclusion method was proposed based on fault detection, named random search method (RSM). The binary code for observational satellites was employed in the new method. Firstly, the initial fault free constellation was obtained by random initialization in RSM. And the final fault free constellation with the largest number of observational satellites was obtained by the search of unselected satellites gradually based on the initialization result. And so, the function of fault exclusion was realized. Simulation results show that, in most cases, the FER of RSM is more than 99%. And the new method has the capable of fault exclusion either for single satellite fault or for simultaneous multiple-satellite faults, and it can effectively meet the requirement of autonomous integrity of GNSS. -
[1] Lee Young C.Receiver autonomous integrity monitoring (RAIM) capability for sole-means GPS navigation in the oceanic phase of flight[J].IEEE Aerospace and Electronic Systems Magazine,1992,7(5):29-36 [2] Hewitson Steve,Wang Jinling.GNSS receiver autonomous integrity monitoring (RAIM) performance analysis[J].GPS Solutions,2006,10(3):155-170 [3] Liu J,Lu M,Cui X,et al.Theoretical analysis of RAIM in the occurrence of simultaneous two-satellite faults [J].IET Radar Sonar Navig,2007,1(2):92-97 [4] Elliott D Kaplan,Christopher J Hegarty.GPS原理与应用[M].2版.寇艳红,译.北京:电子工业出版社,2007:224-280 Elliott D Kaplan,Christopher J Hegarty.Understanding GPS:principles and applications[M].2nd ed.Translated by Kou Yanhong.Beijing:Publishing House of Electronics Industry,2007:224-280(in Chinese) [5] Feng Shaojun,Ochieng Washington Y,Walsh David,et al.A measurement domain receiver autonomous integrity monitoring algorithm[J].GPS Solutions,2006,10(2):85-96 [6] Jin Hong,Zhang Hongyue.Optimal parity vector sensitive to designated sensor fault [J].IEEE Transactions on Aerospace and Electronic Systems,1999,35(4):1122-1128 [7] 杨静,张洪钺.卫星故障诊断的最优奇偶向量法[J].航空学报,2002,23(2):183-186 Yang Jing,Zhang Hongyue.Satellite fault diagnosis based on optimal parity vector method[J].ACTA Aeronautica et Astronautica Sinica,2002,23(2):183-186(in Chinese) [8] 张强,张晓林,常啸鸣.用于卫星导航多星故障识别的新方法[J].航空学报,2008,29(5):1239-1244 Zhang Qiang,Zhang Xiaolin,Chang Xiaoming.New method for satellite navigation identifying simultaneous multi-faulty satellites[J].ACTA Aeronautica et Astronautica Sinica,2008,29(5):1239-1244(in Chinese) -
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