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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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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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creator	Zhang, Runyu Ma, Xiaobing Yang, Li Wang, Huasheng Zhu, Qinglong
description	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.
doi_str_mv	10.1109/ICRMS59672.2023.00115
format	conference_proceeding
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source	IEEE Xplore All Conference Series
subjects	Buildings Costs Data models EM algorithm EMU Estimation Evaluation models Maintenance Maintenance engineering maintenance planning mixture distribution Planning reliability assessment Safety
title	Reliability Modeling and Evaluation of an Electric Multiple Unit Incorporating the Mixture Distribution and EM Algorithm
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