Shafiee, Mahmood, Finkelstein, Maxim (2015) An Optimal Age-based Group Maintenance Policy for Multi-unit Degrading Systems. Reliability Engineering and System Safety, 134 . pp. 230-238. ISSN 0951-8320. (doi:10.1016/j.ress.2014.09.016) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:79821)
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Official URL: https://doi.org/10.1016/j.ress.2014.09.016 |
Abstract
In order to share maintenance set-up costs and reduce system breakdown, the group maintenance policies are widely used for complex multi-unit systems. In this paper, an optimal age-based group maintenance policy is proposed for a multi-unit series system whose components are subject to different gradual degradation phenomena. When the degradation level of a component reaches a given critical size, it is replaced by a new one and the other components undergo a preventive maintenance (PM) action; otherwise, a planned group PM is performed for the whole system at operational age T>0. The problem is to determine an optimal group maintenance time T⁎ such that the system’s average long-run maintenance cost per unit time is minimized. The explicit expression of the objective function is derived and sufficient conditions for existence and uniqueness of the optimal solution are obtained. Finally, the proposed maintenance policy is applied to a group of wind turbine bearings and the results are compared with the case without planned maintenance (i.e., reactive response) and with an individual age-based maintenance policy.
Item Type: | Article |
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DOI/Identification number: | 10.1016/j.ress.2014.09.016 |
Uncontrolled keywords: | Group maintenance; Multi-unit systems; Degradation; Preventive maintenance |
Subjects: |
T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters etc. Industrial instrumentation T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials engineering and construction T Technology > TJ Mechanical engineering and machinery V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
Divisions: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts |
Depositing User: | Mahmood Shafiee |
Date Deposited: | 27 Jan 2020 13:21 UTC |
Last Modified: | 17 Aug 2022 11:02 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/79821 (The current URI for this page, for reference purposes) |
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