Risk Assessment on Railway Signal System Based on Fuzzy-FMECA Method
نویسندگان
چکیده
Risk assessment is becoming increasingly important for railway signal system in order to safeguard their passengers and employees while improving safety and reducing maintenance costs. However, the application of risk assessment methods in railway signal system may not give satisfactory results because the risk data are incomplete or there is a high level of uncertainty involved in the risk data. This article presents a new risk assessment method for railway signal system using Failure Mode, Effects and Criticality Analysis (FMECA) and Fuzzy Analytical Hierarchy Process (FAHP). A case study on risk assessment of Interval Signal Control Function for Train Control Center is used to illustrate the application of the proposed risk assessment method. FMECA is firstly employed to summarize the potential failure modes of this function. And then based on the expert scoring for each failure mode in terms of Probability of Occurrence, Severity, and Detectability. FAHP is used to determine the relative importance of the risk contributions. The risk assessment results show that the application of Fuzzy-FMECA method can identify the failure modes and evaluate the potential risk of the Railway Signal System more objectively and effectively, which will provide railway risk analysts, engineers with a method to improve their safety management of Railway Signal System and set safety standards. Copyright © 2013 IFSA.
منابع مشابه
Risk Evaluation and Application on Fuzzy-FMECA Method Using Cloud Model
In order to safeguard the safety of passengers and reduce maintenance costs, it is necessary to analyze and evaluate the security risk of the Railway Signal System. However, the conventional Fuzzy Analytical Hierarchy Process (FAHP) can not describe the fuzziness and randomness of the judgment, accurately, and once the fuzzy sets are described using subjection degree function, the concept of fu...
متن کاملA fuzzy reasoning and fuzzy-analytical hierarchy process based approach to the process of railway risk information: A railway risk management system
Risk management is becoming increasingly important for railway companies in order to safeguard their passengers and employees while improving safety and reducing maintenance costs. However, in many circumstances, the application of probabilistic risk analysis tools may not give satisfactory results because the risk data are incomplete or there is a high level of uncertainty involved in the risk...
متن کاملUnderground transportation system risk assessment to mitigate vulnerability against natural disasters through intelligent urban management
Quantitative and qualitative monitoring and evaluation of risk management programs will play an important role in the development of Tehran metropolitan railway transport. Considering the tectonic studies, seismic zones, land degradation and faults in north and south of Tehran, the development of underground railway lines, the assessment of the vulnerability of subway stations and the escalatio...
متن کاملA FUZZY MINIMUM RISK MODEL FOR THE RAILWAY TRANSPORTATION PLANNING PROBLEM
The railway transportation planning under the fuzzy environment is investigated in this paper. As a main result, a new modeling method, called minimum risk chance-constrained model, is presented based on the credibility measure. For the convenience ofs olving the mathematical model, the crisp equivalents ofc hance functions are analyzed under the condition that the involved fuzzy parameter...
متن کاملRisk Assessment on Operating Tunnels of High-Speed Railway in Perilous and Mountainous Area
The project named “the rescue system and key technology of high-speed railway in perilous mountains” primarily focuses on current railway constructions and operations in China. To state the relationship between risk events and risk factors, we classified the risk sources of operating tunnels of high-speed railway in perilous and mountainous area and established a hierarchical assessment system ...
متن کامل