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Reliability engineering & system safety v.160, 2017년, pp.201 - 211   SCI SCIE SCOPUS
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A preventive maintenance policy based on dependent two-stage deterioration and external shocks

Yang, Li (School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China ) ; Ma, Xiaobing (School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China ) ; Peng, Rui (Dongling School of Economics and Management, University of Science and Technology, Beijing 100083, China ) ; Zhai, Qingqing (Department of Industrial and Systems Engineering, National University of Singapore, 119260, Singapore ) ; Zhao, Yu (School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China ) ;
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    Abstract This paper proposes a preventive maintenance policy for a single-unit system whose failure has two competing and dependent causes, i.e., internal deterioration and sudden shocks. The internal failure process is divided into two stages, i.e. normal and defective. Shocks arrive according to a non-homogeneous Poisson process (NHPP), leading to the failure of the system immediately. The occurrence rate of a shock is affected by the state of the system. Both an age-based replacement and finite number of periodic inspections are schemed simultaneously to deal with the competing failures. The objective of this study is to determine the optimal preventive replacement interval, inspection interval and number of inspections such that the expected cost per unit time is minimized. A case study on oil pipeline maintenance is presented to illustrate the maintenance policy. Highlights A maintenance model based on two-stage deterioration and sudden shocks is developed. The impact of internal system state on external shock process is studied. A new preventive maintenance strategy combining age-based replacements and periodic inspections is proposed. Postponed replacement of a defective system is provided by restricting the number of inspections.


  • 주제어

    Preventive maintenance .   Delay time .   External shock .   Competing failures .   Expected cost per unit time.  

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