An optimal inspection and replacement policy for a two-unit system

Li Yang, Yu Zhao, Xiaobing Ma and Qingan Qiu

Journal of Risk and Reliability, 2018, vol. 232, issue 6, 766-776

Abstract: We study a preventive maintenance policy for a system composed of two units, a binary state unit and a three-state unit. Failures of both units are hard and self-announcing. The intermediate, defective state for the second unit can be regarded as a signal of pending failures. Unit 2 is inspected when its age attains integral multiples of interval s and when unit 1 fails, and preventive replacement is immediate once the defective state is revealed. This strategy could be extended by further providing preventive replacement for the first unit. A case study on an offshore wind turbine is presented for illustration. We find that opportunistic maintenance schemed for both units could effectively reduce the maintenance cost.

Keywords: Modeling/simulation; component failure analysis; system failure modeling; condition-based maintenance; maintenance optimization (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:sae:risrel:v:232:y:2018:i:6:p:766-776

DOI: 10.1177/1748006X18761488

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