GNSS/INS Based Risk Assessment in Train Localization
WU Boqian1,2,3, CAI Baigen1,3, LU Debiao1,2,3, WANG Jian1,2,3
1. School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China; 2. State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China; 3. Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation,Beijing 100044,China
Abstract:Risk assessment of global navigation satellite system (GNSS) used in train localization services is essential to fulfilling safety requirements. In this work,GNSS and inertial navigation system (INS) are integrated to build train localization units. The fault detection and identification is realized by the analysis of sensor fusion data,and the horizontal protect level (HPL) is calculated. According to horizontal position error (HPE),horizontal alert limit (HAL) and time to alert (TTA),the states of a train localization unit can be identified. Then the hazardous events caused by risky states are analyzed,the probability of wrong-side failure and the hazard rate are calculated. Finally,the risk assessment method is tested with field data. It is shown that when the false alarm rate and miss detection rate are 1×10-7/h,and the HAL is 20 m,the hazard rate of the train localization unit are calculated as 9.14×10-7/h in open area and 1.52×10-4 /h in constrained environment,respectively. When the railway line requirements on the risk indexes become low,i.e.,the false alarm rate,miss detection rate and HAL are all increased,the hazard rate will be reduced. As a result,the hazard rate will be 0 in constrained environment when the false alarm rate and miss detection rate are all 1×10-5/h,and HAL is 100 m. Therefore,it is necessary to cosider requirement difference for railway lines when implementing the risk assessment.
DORIDES C. GNSS market report 2017-rail [EB/OL]. [2019-06-20]. https://www.gsa.europa.eu/system/files/reports/gnss_market_report_2017_-_rail.pdf.
[2]
刘江,蔡伯根,王剑. 基于卫星导航系统的列车定位技术现状与发展[J]. 中南大学学报(自然科学版),2014,45(11): 4033-4042LIU Jiang, CAI Baigen, WANG Jian. Status and development of satellite navigation system based train positioning technology[J]. Journal of Central South University (Science and Technology), 2014, 45(11): 4033-4042
[3]
FILIP A. Efficient use of multi-constellation EGNOS for the European train control system[C]//Proceedings of the 2016 European Navigation Conference (ENC GNSS 2016),Helsinki: IEEE AESS,2016: 1-9.
[4]
NGUYEN T P K, BEUGIN J, MARAIS J. Method for fvaluating an extended fault tree to analyse the dependability of complex systems:application to a satellite-based railway system[J]. Reliability Engineering & System Safety, 2015, 133: 300-313
[5]
王剑,陆德彪,唐一哲,等. 基于虚拟应答器的GNSS列车安全定位及风险分析[J]. 铁道学报,2016,38(6): 53-58WANG Jian, LU Debiao, TANG Yizhe, et al. Virtual balise application for GNSS train safe location and risk analysis[J]. Journal of the Chine Railway Society, 2016, 38(6): 53-58
[6]
杨扬. 基于GNSS的列车定位系统安全风险分析研究[D]. 兰州:兰州交通大学,2018.
[7]
LU D,SCHNIEDER E. Performance evaluation of GNSS for train localization[J]. IEEE Transactions on Intelligent Transportation Systems,2015,16(2): 1054-1059.
[8]
FILIP A, BEUGIN J, MARAIS J, et al. Interpretation of the Galileo safety-of-life service by means of railway RAMS terminology[J]. Transactions on Transport Sciences, 2008, 1(2): 61-68
[9]
LEGRAND C, BEUGIN J, MARAIS J, et al. From extended integrity monitoring to the safety evaluation of satellite-based localization system[J]. Reliability Engineering & System Safety, 2016, 155: 105-114
[10]
RUSTAMOV B,HASHIMOV A M. Multifunctional operation and application of GPS[M]. London:IntechOpen,2018: 23-43.
[11]
TORO F G, LU D, MANZ H, et al. Accuracy evaluation of GNSS for a precise vehicle control[J]. IFAC Proceedings Volumes, 2012, 45(24): 78-82
MATTIS J N,CHAO E L,DUKE E C. 2017 federal radio navigation plan[R]. Washington:United States Department of Transportation,2017.
[14]
MOCEK H, FILIP A, BAZANT L. Galileo safety-of-life service utilization for railway non-safety and safety critical applications[J]. Journal of Mechanical Systems for Transportation and Logistics, 2010, 3(1): 119-130
[15]
FILIP A. The multi-constellation SBAS-R interface as an international standard for high-safety integrity land transport systems[C]//2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA). [S.l.]: IEEE,2015: 203-208.
[16]
European GNSS Agency. Rail report on user needs and requirements v1.0[EB/OL]. [2019-06-20]. https://www.gsc-europa.eu/sites/default/files/sites/all/files/Report_on_User_Needs_and_Requirements_Rail.pdf