期刊
RELIABILITY ENGINEERING & SYSTEM SAFETY
卷 121, 期 -, 页码 276-288出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2013.09.004
关键词
Stochastic degradation; Dependency; Copula; Optimum maintenance; Condition-based maintenance
资金
- Natural Science and Engineering Research Council of Canada
- University of Western Ontario
Components in engineered systems are subjected to stochastic deterioration due to the operating environmental conditions, and the uncertainty in material properties. The components need to be inspected and possibly replaced based on preventive or failure replacement criteria to provide the intended and safe operation of the system. In the present study, we investigate the influence of dependent stochastic degradation of multiple components on the optimal maintenance decisions. We use copula to model the dependent stochastic degradation of components, and formulate the optimal decision problem based on the minimum expected cost rule and the stochastic dominance rules. The latter is used to cope with decision maker's risk attitude. We illustrate the developed probabilistic analysis approach and the influence of the dependency of the stochastic degradation on the preferred decisions through numerical examples. (C) 2013 Published by Elsevier Ltd.
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