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Reliability analysis of subway sliding plug doors based on improved FMECA and Weibull distribution
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The School of Electrical Engineering and Electronic Information, Xihua University, China
The State Grid Sichuan Electric Power Research Institute, China
The School of Electrical Engineering, Southwest Jiaotong University, China
China Broadnet Pengzhou Branch, Chengdu 611930, China
Submission date: 2023-10-16
Final revision date: 2023-11-11
Acceptance date: 2024-01-04
Online publication date: 2024-02-11
Publication date: 2024-02-11
Corresponding author
Weibo Wang   

The School of Electrical Engineering and Electronic Information, Xihua University, China
Eksploatacja i Niezawodność – Maintenance and Reliability 2024;26(2):178275
  • An improved FMECA method is proposed that can effectively consider the effect of the repetitive values, expert weights, and evaluation factors' weights on hazard analysis.
  • Researching different reliability evaluation indexes, MTBF and component fault rates.
  • Testing the service life of the subway sliding plug door by Weibull distribution and predicting its remaining useful life.
Using traditional FMECA to analyze the hazard of subway sliding plug door system, there are problems such as easy-to-take repetitive values, irrational allocation of expert's weights, and failure to consider the weights of evaluation factors. Hence, this paper proposes to improve FMECA by using linear interpolation to increase the differentiation of the same fault probability occurrence among various fault modes. Apply the DUOWA to dynamically assign weights to different experts. The AHP is used to endow weights to diverse evaluation factors to make them more suitable for engineering needs. The operation records of metro trains were collected from the Shanghai subway manufacturing plant for 1836 days. The hazards of the 17 common faults of the door were first analyzed using an improved FMECA,the EDCU is the component most prone to failure. Next, use a RCM strategy to determine maintenance periods for different faults. Finally, through the Weibull distribution fitting test, the fault rate function of the door is obtained, and the RUL of the door is predicted.
The project was supported by Chunhui Plan of the Ministry of Education of China (No. 202201500)
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