Reliability Modeling and Evaluation of an Electric Multiple Unit Incorporating the Mixture Distribution and EM Algorithm

As large, complex, highly reliable technical equipment, electric multiple units (EMUs) require long-term maintenance to ensure safety and reliability during service. Because the maintenance cost of an EMU accounts for a large proportion of its entire life-cycle cost, scientific planning of the maint...

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Bibliographic Details
Main Authors: Zhang, Runyu, Ma, Xiaobing, Yang, Li, Wang, Huasheng, Zhu, Qinglong
Format: Conference Proceeding
Language:English
Subjects:
Buildings
Costs
Data models
EM algorithm
EMU
Estimation
Evaluation models
Maintenance
Maintenance engineering
maintenance planning
mixture distribution
Planning
reliability assessment
Safety
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Summary:As large, complex, highly reliable technical equipment, electric multiple units (EMUs) require long-term maintenance to ensure safety and reliability during service. Because the maintenance cost of an EMU accounts for a large proportion of its entire life-cycle cost, scientific planning of the maintenance interval is vital to reduce maintenance cost and improve maintenance efficiency. This paper proposes a reliability modeling and evaluation approach for EMUs under multi-level maintenance scheduling, with the purpose of extending maintenance intervals and saving maintenance resources. A comprehensive reliability model is established via the mixture distribution approach; accordingly, the point estimation of the mixture distribution model is realized using the EM algorithm. The model feasibility and rationality are highlighted through an engineering case study with actual EMU failure/operational data, where the rationality of extending the maintenance interval (for Level 3 maintenance level) is demonstrated.
ISSN:2575-2642
DOI:10.1109/ICRMS59672.2023.00115