奇偶矢量 RAIM算法的故障检测研究

彭兴钊; 黄国荣; 郭创; 程洪炳

doi:10.15892/j.cnki.djzdxb.2011.06.006

2011 , Vol. 31 >Issue 6: 199 - 202

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2011.06.006

摘要

RAIM作为一种行之有效的卫星故障诊断方法,在GPS完好性监测中发挥着重要作用。文中基于奇偶矢量RAIM算法,根据检验统计量在正常和故障情况下概率密度函数的不同,从概率角度对GPS完好性进行研究分析,主要阐述了误警率、漏检率和检测门限的概念及其之间的关系;并得出了可见卫星数增多时,漏检率不降反升的结果,这是RAIM算法的一个致命缺陷;最后仿真分析了伪距误差对漏警率的影响。

关键词： RAIM; GPS完好性; 奇偶矢量; 概率密度函数; 漏检率

本文引用格式

彭兴钊 , 黄国荣 , 郭创 , 程洪炳 . 奇偶矢量 RAIM算法的故障检测研究[J]. 弹箭与制导学报, 2011 , 31(6) : 199 -202 . DOI: 10.15892/j.cnki.djzdxb.2011.06.006

Abstract

As an effective method of satellite failure detection, RAIM plays an important role in GPS integrity monitoring realm. Based on the parity vector RAIM algorithm, according to the different distribution of test statistic's probability density function (PDF) in normal and failure conditions, the GPS integrity was analyzed in statistical aspect, then the relation among false alarming rate, miss detection rate and detection threshold was explainedhe. The conclusion is that when the number of visual satellites increases, the miss detection rate rather than reduces; this is a fatal defect for RAIM. Finally, the influence of pseudo range on miss detection rate was simulated.

Key words： RAIM; GPS integrity; parity vector; probability density function (PDF); miss detection rate

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