一种多故障条件下RAIM完好性风险计算方法  

A Method for Calculating the Integrity Risk of RAIM under Multiple Fault Conditions

作　　者：曹俊 薛兵 袁运斌 代泽林 王一帆 CAO Jun;XUE Bing;YUAN Yunbin;DAI Zelin;WANG Yifan(Electric Power Science Research Institute of Yunnan Power Grid Co Ltd,105 West-Yunda Road,Kunming 650217,China;School of Civil Engineering and Architecture,Wuyi University,99 Mid-Yingbin,Jiangmen 529020,China;Jiangmen Land Surveying and Mapping Brigade,83 First-Jianghai Road,Jiangmen 529000,China;Innovation Academy for Precision Measurement Science and Technology,CAS,340 Xudong Street,Wuhan 430077,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明市650217 [2]五邑大学土木建筑学院,广东省江门市529020 [3]江门市国土测绘大队,广东省江门市529000 [4]中国科学院精密测量科学与技术创新研究院,武汉市430077

出　　处：《大地测量与地球动力学》2025年第4期351-355,共5页Journal of Geodesy and Geodynamics

基　　金：中国南方电网云南电网有限责任公司科技项目(YNKJXM20220033);江门市社会发展领域科技计划(2024800200250007826)。

摘　　要：提出一种多故障条件下RAIM完好性风险计算方法。该方法基于最小二乘残差构建卡方检验统计量进行故障检测,并进一步根据检验统计量和定位误差的概率分布,通过搜索多个故障模式下最差情况故障向量实现完好性风险计算。实验结果表明,该方法能够有效监测多故障完好性风险,在观测几何较差时段实现风险告警,保障用户定位可靠。在航空LPV-200阶段的完好性需求下,用户定位结果的可用性达到99.47%。This paper proposes a method that can calculate the integrity risk of RAIM under multiple fault conditions.This method is based on constructing a chi-square test statistic using least squares residuals for fault detection,and further calculates the integrity risk by searching for the worst case fault vector under multiple fault modes based on the probability distribution of the test statistic and positioning error.The actual experimental results show that the proposed method can effectively monitor the integrity risk of multiple faults,achieve risk alarms during periods of poor observation geometry,and ensure reliable user positioning.Under the integrity requirements of the aviation LPV-200 phase,the availability of user positioning results reached 99.47%.

关 键 词：接收机自主完好性监测 故障模式 故障向量 最差情况 完好性风险 

分 类 号：P228[天文地球—大地测量学与测量工程]