Quantitative Analysis and Allocation of Safety Integrity Level Indexes for Urban Rail Transit Vehicle System
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 6
Abstract
Objective Development and application of FAO (fully automatic operation)system in urban rail transit train requires higher safety of urban rail vehicle system. Under the new operation scenario where FAO needs to be confirmed, it is necessary to sort through the safety requirements for urban rail transit train from the top level, determine the SIL (safety integrity level) of the critical system in urban rail transit vehicle. Method FTA (fault tree analysis), Risk Matrix and FMECA (failure mode, effects and criticality analysis) are all used to conduct hazard identification, risk analysis, and quantitative index allocation layer by layer from the system level of entire train line to the vehicle system level, the vehicle subsystem level. Result & Conclusion The safety requirements and the SIL of urban rail transit vehicle system are obtained through analysis. The safety functions of the traction system include emergency braking traction cut off function, direction control function, traction enable function, and braking control function, except the first one belongs to SIL3, all other three functions are SIL2. The safety functions of the braking system include emergency braking function, anti-skid control function, service braking function, and brake holding function, belonging to SIL4, SIL3, SIL2, and SIL2 respectively. The safety functions of the network system include brake holding function, driver′s cabin activation function, direction management function, traction braking command management function, and level management function, all belonging to SIL2.
Authors and Affiliations
Jiaomei QIN, Demin PAN, Kaijiang FAN
Keywords
Related Articles
- EP ID EP737769
- DOI 10.16037/j.1007-869x.2024.06.040
- Views 67
- Downloads 1
Method for Restoring Urban Rail Transit Passenger Spatio-Temporal Paths in Consideration of Congestion
Objective Passenger flow is the pillar for operation and management of urban rail transit. With the increasing development of urban rail transit, the demand for meticulous and accurate passenger flow analysis is getting...
Prediction of Traction Energy Consumption for Urban Rail Transit Trains in Relative Speed Mode
［Objective］ It is aimed to accurately predict the traction energy consumption of urban rail transit trains operating in relative speed mode using support vector machine（SVM）regression and genetic algorithms, ultimate...
Transport Capacity Enhancement for Shanghai Urban Rail Transit Existing Lines
Objective Aiming to propose effective methods and specific cases for capacity enhancement, the implementation experiences of capacity improvement renovation projects on existing Shanghai urban rail transit lines are syst...
Control Algorithm of Train Autonomous Control System in Turnout Safety Zones
[Objective] Unlike the existing CBTC (communication-based train control) system control mechanism, the ATC (autonomous train control) system achieves autonomous train operation by directly controlling wayside resources....
Adaptability of Medium-low Speed Maglev System in City (Suburban) Railway
Objective Addressing the current issues of relatively limited system choices, large engineering investment, and high proportion of underground lines, the adaptability of medium-low speed maglev lines in city (suburban) r...