Fault Diagnosis of Switch Machine and FMECA Analysis for Signal System

• Main Authors: HSU, KUANG-YU, 徐光佑
• Other Authors: SHAW, JIN-SIANG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/5gpc2x

碩士 === 國立臺北科技大學 === 製造科技研究所 === 107 === Safety is the most important thing in the railway industry. The signal is the driving safety control system for protecting online trains; all trains operate in accordance with the signal system command to achieve safety objectives. The switch machine is the key equipment to Signal Interlocking System. In order to improve the reliability, the writer collects the switch machine data of fault, analyze it then propose a solution. Furthermore, the failure mode, effect and critical analysis (FMECA) is used to analyze the defects, weaknesses of the signaling system design to improve the design. The writer gathers fault statistics of the abnormality for a certain signaling system switch machine that operates in Taiwan, analyzes the data and proposes the solution. The conclusions obtained from the data analysis are as follows: (1) The higher number of inversions, the higher the failure rate. (2) The highest fault ratio is when the gap size between the switch machine and the track gap is not conformity with the specification and it needs to be adjusted. (3) Due to rainy, foggy and windy winds factors, the failure rate in hilly terrain is higher than the general terrain (4) The switch machine failure rate is 81.5% in the rainy season. (5) In the rainy season, rainwater and moisture are brought into the tunnel with the acceleration of the operating trains. Therefore, the failure probability of the switch machine in the tunnel section is not much different from the unsheltered section during the rainy season. (6) The failure rate in the hilly area during the rainy season is obviously higher. If there is enough manpower, it is suggested to have inspection monthly instead of quarterly from May to September. (7) There is no obvious correlation between the switch machine in the climbing section and the failure rate.