摘要
针对全球卫星导航系统(GNSS)在列车定位过程中,出现故障卫星会危及行车安全这一问题,提出了将接收机自主完好性监测(RAIM)技术应用到列车定位。在分析多星座系统列车定位及RAIM算法原理的基础上,构造了多星座系统的观测方程,利用奇偶矢量法构造检测统计量对故障卫星进行检测识别。采用青藏铁路数据对全球定位系统(GPS)、伽利略卫星导航系统(Galileo)、北斗卫星导航系统(BDS)多星座组合RAIM和GPS单星座RAIM进行仿真测试。结果表明,多星座系统的水平保护级(HPL)相对较小,且故障检测率和故障识别率较单星座系统有明显提高,位置精度因子明显降低,表明多星座RAIM技术可有效提高列车定位的精度。
Aiming at the problem that the failure of satellites in the Global Navigation Satellite System(GNSS)during train positioning will endanger driving safety,the application of Receiver Autonomous Integrity Monitoring(RAIM)technology to train positioning is proposed.Based on the analysis of the train positioning and RAIM algorithm principle of the multiconstellation system,the observation equation of the multi-constellation system is constructed,and the detection statistics are constructed using the parity vector method to detect and identify the faulty satellite.This article uses the Qinghai-Tibet railway data to simulate and test the RAIM algorithm under the Global Positioning System(GPS),Galileo satellite navigation system(Galileo),BeiDou navigation satellite System(BDS)multi-constellation system and GPS single constellation system.The results show that the Horizontal Protection Level(HPL)of the multi-constellation system is relatively small,and the fault detection rate and fault recognition rate are significantly improved compared with the single-constellation system,and the position accuracy factor is significantly reduced,indicating that the multi-constellation RAIM technology can effectively improve the train The accuracy of positioning.
作者
铁凯博
米根锁
王彦快
TIE Kaibo;MI Gensuo;WANG Yankuai(School of Automatization and Electric Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《导航定位学报》
CSCD
2022年第3期152-159,共8页
Journal of Navigation and Positioning
基金
国家自然科学基金项目(61763025)
兰州交通大学青年科学研究基金项目(1200061027)。
关键词
全球卫星导航系统
列车定位
接收机自主完好性监测
奇偶矢量法
故障检测
global satellite navigation system
train positioning
receiver autonomous integrity monitoring
parity vector method
fault detection
