A Dynamic Prescriptive Maintenance Model Considering System Aging and Degradation

Liu, B.Department of Management Science, University of Strathclyde, Glasgow, United Kingdom (författare)

Validerad;2019;Nivå 2;2019-08-20 (svasva)
This paper develops a dynamic maintenance strategy for a system subject to aging and degradation. The influence of degradation level and aging on system failure rate is modeled in an additive way. Based on the observed degradation level at the inspection, repair or replacement is carried out upon the system. Previous researches assume that repair will always lead to an improvement in the health condition of the system. However, in our study, repair reduces the system age but on the other hand, increases the degradation level. Considering the two-fold influence of maintenance actions, we perform reliability analysis on system reliability as a first step. The evolution of system reliability serves as a foundation for establishing the maintenance model. The optimal maintenance strategy is achieved by minimizing the long-run cost rate in terms of the repair cycle. At each inspection, the parameters of the degradation processes are updated with maximum a posteriori estimation when a new observation arrives. The effectiveness of the proposed model is illustrated through a case study of locomotive wheel-sets. The maintenance model considers the influence of degradation and aging on system failure and dynamically determines the optimal inspection time, which is more flexible than traditional stationary maintenance strategies and can provide better performance in the field.

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Annan samhällsbyggnadsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Other Civil Engineering hsv//eng
Aging and degradation process
dynamic maintenance strategy
locomotive wheel-sets
prescriptive maintenance
sequential schedule
Drift och underhållsteknik
Operation and Maintenance

Lin, JingLuleå tekniska universitet,Drift, underhåll och akustik(Swepub:ltu)linjan (författare)
Zhang, LiangweiLuleå tekniska universitet,Drift, underhåll och akustik,Department of Industrial Engineering, Dongguan University of Technology, Dongguan, China(Swepub:ltu)liazha (författare)
Kumar, UdayLuleå tekniska universitet,Drift, underhåll och akustik(Swepub:ltu)uday (författare)
Department of Management Science, University of Strathclyde, Glasgow, United KingdomDrift, underhåll och akustik (creator_code:org_t)

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