TY - GEN
T1 - Functional safety of railway signaling systems
T2 - 31st European Safety and Reliability Conference, ESREL 2021
AU - Zhang, Aibo
AU - Jiang, Lei
AU - Xie, Min
AU - Kassa, Elias
AU - Liu, Yiliu
PY - 2021/9
Y1 - 2021/9
N2 - Signaling is fundamental to the safe operation of the railway, ensuring that trains are spaced safely apart and conflicting movements are avoided. Railway signals are ‘traffic light’ devices, which tell a train driver if it’s safe to proceed along the track. A railway signaling system consists of several complex subsystems, e.g. trackside-and onboard signaling systems, which cooperate to ensure the safe operation of railway traffic. The failure of signaling system will weaken both capacity and safety of the railway. It is therefore important to keep the railway signaling system complying with the defined performance requirements. The purpose of this study starts with the summarization of railway RAMS, focusing on railway signaling systems. The tolerable hazard rate (THR) which is an indicator of signaling system performance in EN 50129 (2018) has been compared with the similar indictor PFH (probability of failure per hour) for safety-related systems in IEC 61508 (2010). Based on the commonly used methods for safety-related systems in IEC 61508 (2010), several reliability modeling and analysis methods have been listed and reviewed for the specific system. This paper aims to provide clues for the engineers and analysts in the performance evaluation for the railway signaling system.
AB - Signaling is fundamental to the safe operation of the railway, ensuring that trains are spaced safely apart and conflicting movements are avoided. Railway signals are ‘traffic light’ devices, which tell a train driver if it’s safe to proceed along the track. A railway signaling system consists of several complex subsystems, e.g. trackside-and onboard signaling systems, which cooperate to ensure the safe operation of railway traffic. The failure of signaling system will weaken both capacity and safety of the railway. It is therefore important to keep the railway signaling system complying with the defined performance requirements. The purpose of this study starts with the summarization of railway RAMS, focusing on railway signaling systems. The tolerable hazard rate (THR) which is an indicator of signaling system performance in EN 50129 (2018) has been compared with the similar indictor PFH (probability of failure per hour) for safety-related systems in IEC 61508 (2010). Based on the commonly used methods for safety-related systems in IEC 61508 (2010), several reliability modeling and analysis methods have been listed and reviewed for the specific system. This paper aims to provide clues for the engineers and analysts in the performance evaluation for the railway signaling system.
KW - Performance assessment
KW - Probability of failure per hour
KW - Railway signaling system
KW - Tolerable hazard rate
UR - http://www.scopus.com/inward/record.url?scp=85135455963&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85135455963&origin=recordpage
U2 - 10.3850/978-981-18-2016-8_743-cd
DO - 10.3850/978-981-18-2016-8_743-cd
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 978-981-18-2016-8
T3 - Proceedings of the 31st European Safety and Reliability Conference, ESREL
SP - 3192
EP - 3198
BT - Proceedings of the 31st European Safety and Reliability Conference
A2 - Castanier, Bruno
A2 - Cepin, Marko
A2 - Bigaud, David
A2 - Berenguer, Christophe
PB - Research Publishing, Singapore
Y2 - 19 September 2021 through 23 September 2021
ER -