Analysis on Reliability and Security of ZPW-2000A Track Circuit System Based on FMEDA and FTA
Hongsheng Su, Wenbin Wang · 2013
To aim at the reliability and security issues of ZPW-2000A Jointless Audio Frequency-shift Modulated Track Circuit System, Failure Modes Effects and Diagnositcs Analysis (FMEDA) and Fault Tree Analysis (FTA) were proposed for reliability and security analysis of system. The system was analyzed and defined, the FMEDA table was completed, and the fault tree was built, then the qualitative and quantitative analyses of the fault tree were conducted. The minimal cut sets of the fault tree were got by qualitative analysis, and the weak links of the system were located. The fail probability of roof events, important degree of each minimal cut sets and the indicators of reliability and security were gained through the quantitative analysis. The paper provides a practical method and theoretical basis for the reliability and security analysis of ZPW-2000A track circuit system. Copyright © 2013 IFSA.