ISC参数改正的RAIM故障检测和识别  

Detection and Identification of RAIM Fault Based on Inter-Signal Correction Parameters

作　　者：张亚彬 王利[1,2,3,4] 范丽红 曲轩宇[1,2,3,4] ZHANG Yabin1,2,3,4;WANG Li1,2,3,4;FAN Lihong1,2,3,4;QU Xuanyu 1,2,3,4(1. College of Geological Engineering and Surveying and Mapping, Chang＇an University, Xi＇an 710054, China;2.State Key Laboratory of Geographic Information Engineering, Xi＇an 710054, China; 3. Key Laboratory of Mineral Resourees and Geological Engineering of the Ministry of Education, Xi＇an 710054, China; 4.National Administration of Surveying, Mapping and Geo-information Engineering Research Center of Geographic National Conditions Monitoring, Xi＇an 710054, Chin)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]西部矿产资源与地质工程教育部重点实验室,陕西西安710054 [4]地理国情监测国家测绘地理信息局工程技术研究中心,陕西西安710054

出　　处：《测绘科学技术学报》2018年第1期49-54,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41731066;41604001;41504006);中国第二代卫星导航系统重大专项(GFZX301040308);中央高校基本科研业务费专项(310826172006;310826172202;310826173101)

摘　　要：本文主要探讨RAIM算法中引入ISC参数改正对故障检测和识别的改进效果。采用若干MGEX站的观测数据,分别将未引入与已引入ISC参数改正的RAIM算法进行比较。实验结果表明,引入ISC参数改正的RAIM算法在单位权中误差σ、水平误差保护级别HPL、故障检验门限σT以及故障识别门限WT这4方面精度均有所提高;通过传统RAIM、有无引入ISC参数改正滑动开窗RAIM算法的对比分析,引入ISC参数改正的滑动开窗RAIM算法各项指标改善效果最优。从总体上看,引入ISC参数改正后,RAIM算法的故障检测率与故障识别率均有不同程度的提高。The effect of fault detection and identification is discussed in this paper when ISC parameter correction is introduced in the Receiver Autonomous Integrity Monitoring（ RAIM） algorithm. Then the RAIM algorithm with and without ISC parameter correction are compared respectively using observation data of several Multi-GNSS Experiment（ MGEX） stations. The results indicate that the RAIM algorithm with ISC parameter correction is improved in four aspects,such as error of the unit weight（ σ）,horizontal protection level（ HPL）,fault checking threshold（ σT） and fault identification threshold（ WT）. Through analyzing comparatively among the traditional RAIM,sliding window RAIM with and without ISC parameters correction,it is found that the sliding window RAIM algorithm with ISC parameter correction is the best. In general,the fault detection rate and fault identification rate of RAIM algorithm are improved in different level when the ISC parameter correction is added.

关 键 词：ISC参数 RAIM算法 可用性 滑动开窗 故障检测和识别 水平误差保护级别 

分 类 号：P228[天文地球—大地测量学与测量工程]