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Your search keyword '"Dong, Qinglai"' showing total 2 results
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2 results on '"Dong, Qinglai"'

1. Reliability analysis and preventive maintenance policy for consecutive k$k$‐out‐of‐n:F$n: F$ balanced system under failure criterion operating in shock environment.

Author

Dong, Qinglai and Bai, Mengmeng

Subjects
*SYSTEM failures, *MONTE Carlo method, *MARKOV processes, *MAINTENANCE costs
Abstract

This paper presents a consecutive k$k$‐out‐of‐n$n$: F$F$ balance system in a shock environment, where the state transition of component is induced by external shocks. If a predetermined threshold number of effective shocks are applied to component in a critical state, the component will fail. The state of the system is defined by the number of consecutive failing component groups in the system, which leads to system failure when a critical number of consecutive failing components is reached. To minimize maintenance costs, we propose a preventive maintenance method with an optimization model. We use finite Markov chain imbedding and Phase‐type distribution to calculate component group failure rates and associated probability functions in discrete and continuous time, respectively. The validity and accuracy of the model are confirmed by numerical examples and Monte Carlo simulations. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Reliability analysis of k-out-of-n: Grepairable systems considering common cause failure and multi-level maintenance strategy

Author

Dong, Qinglai, Liu, Pin, and Jia, Xujie

Abstract

A common cause failure occurs when two or more elements fail due to a shared cause. The system with such failure often needs different repairmen and a multi-level maintenance strategy. The paper studies the reliability of k-out-of-n: Grepairable systems considering common cause failure and multi-level maintenance strategy. The models with a multi-level maintenance strategy are established by considering the failure of all and partial components due to common cause failure. The reliability indices of the systems, such as availability and the mean time to first failure, are derived. An optimization maintenance model is established by minimizing the cost, and a three-level maintenance strategy is determined. Numerical examples are provided to illustrate the application. The results show that the multi-level maintenance strategy improves the system reliability and reduces the maintenance costs of systems with common cause failure.

Published
2024
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