Hazard Rate Estimation for GNSS-Based Train Localization Using Model-Based Approach  

作　　者：LU Debiao TANG Dezhang SPIEGEL Dirk 

机构地区：[1]Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation,Beijing 100044,China [2]School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China [3]Deutsche Bahn AG,Bahntower,Potsdamer Platz 2,Berlin 10785,Germany

出　　处：《Chinese Journal of Electronics》2020年第1期49-56,共8页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61603027,No.U1734203);Beijing Science Program of Beijing Municipal Science and Technology(No.Z181100001018032);National Engineering Research Center of Rail Transportation Operation and Control System,Beijing Jiaotong University(No.NERC2019K005)

摘　　要：GNSS(Global navigation satelHte system)has shown its ability on the non-safety releva nt applications in various applications.In railway domain,safety is the utmost concern,GNSS-based train localization unit is the carrier of safe localization.EN 50126 standard specifies the elec trie and elec tronic system performance requirements as Reliability,availability,maintainability and safety(RAMS).Safety performance characteristic is based on the reliability and availability analysis results.The formal method considering the risk identification and analysis is compulsory for the safety assessment.This paper provides the method for hazard analysis of the GNSS-based train localization function and further the hazard rate estimation of each hazard.The model-based approach using GNSS localization unit working principle is proposed to study railway localization behavior features.The hazard for the localization unit is formally stated,real collected data on circular test track in Beijing is studied using the proposed method.The result shows that the safety requirement of the performance can be transformed into safety integrity properly,the risks of GNSS in train station environment conditions are presen ted.GNSS(Global navigation satellite system)has shown its ability on the non-safety relevant applications in various applications. In railway domain, safety is the utmost concern, GNSS-based train localization unit is the carrier of safe localization. EN 50126 standard specifies the electric and electronic system performance requirements as Reliability, availability, maintainability and safety(RAMS). Safety performance characteristic is based on the reliability and availability analysis results.The formal method considering the risk identification and analysis is compulsory for the safety assessment. This paper provides the method for hazard analysis of the GNSS-based train localization function and further the hazard rate estimation of each hazard. The model-based approach using GNSS localization unit working principle is proposed to study railway localization behavior features.The hazard for the localization unit is formally stated, real collected data on circular test track in Beijing is studied using the proposed method. The result shows that the safety requirement of the performance can be transformed into safety integrity properly, the risks of GNSS in train station environment conditions are presented.

关 键 词：Tolerable hazard rate GNSS Risk analysis Train localization. 

分 类 号：TN967.1[电子电信—信号与信息处理] U284.48[电子电信—信息与通信工程]