An efficient quasi-periodic inspection scheme for a one-component system
An efficient quasi-periodic inspection scheme for a one-component system
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DOI：
10.1093/imaman/dpv018
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发表时间：
2017-07
影响因子：
1.7
通讯作者：
R. Jiang
中科院分区：
文献类型：
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作者：
R. Jiang
与延迟时间概念相关的定期检查策略的一个缺点是，早期检查通常对可靠性几乎没有贡献，但增加了检查成本和停机时间。本文考虑了一种具有两个决策变量(检验间隔和首次检验时间，检验间隔的整数倍)的准周期检验策略，它避免了不必要的检验，并且易于实现。对于该策略，研究了三个具有不同目标和约束组合的优化问题，这取决于安全关键程度或经济因素。给出了求解最优解的方法，并通过算例说明了该检测策略的有效性。主要结果是：(A)延迟时间的特性(如大小和离散度)的影响取决于优化准则；(B)最佳检查间隔通常是平均延迟时间的0.5-1.0倍。
A drawback of the periodic inspection policy associated with the delay-time concept is that early inspections typically contribute little to reliability but increase inspection cost and downtime. In this paper, we consider a quasi-periodic inspection policy with two decision variables (the inspection interval and the time to the first inspection, an integer multiple of the inspection interval) that avoids unnecessary inspections and can be conveniently implemented. For the policy, three optimization problems with different combinations of objectives and constraint are examined, depending on whether safety criticality or economic factors dominate. The method to find the optimal solution is presented, and the effectiveness of the proposed inspection policy is illustrated by a numerical example. The main findings are: (a) the effect of the characteristics (e.g., magnitude and dispersion) of delay time depends on the optimisation criterion; (b) the optimal inspection interval is generally 0.5–1.0 times the mean delay time.