System repairs: When to perform and what to do?
System repairs: When to perform and what to do?
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DOI：
10.1016/j.ress.2007.03.023
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
D. Lugtigheid;D. Banjevic;A. Jardine
中科院分区：
文献类型：
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作者：
D. Lugtigheid;D. Banjevic;A. Jardine
在本文中，使用了一个指标来反映系统的“状态”，它是系统所组成的(组)子系统年龄的函数。子系统的年龄对系统状态的贡献由它们的权重来定义。该指标可以解释为系统的虚拟年龄，因此可以用来定义在虚拟年龄或减龄过程中不同类型的维修的减龄系数。在比例强度模型中，状态指示器被用作时间尺度。通过这种方法，可以评估不同维修策略和协变量对系统失效强度的联合影响。然后使用这种关系来解决每当系统进入维修时替换哪些子系统以及何时设置预防性检查/维修间隔的问题，以便将直到下一次检查和/或维修的每单位时间的预期成本降至最低。给出了数值算例和实际算例。
In this paper an indicator is used that reflects the “state” of a system as a function of the ages of the (groups of) subsystems of which it consists. The contribution of the ages of the subsystems to the state of the system is defined by their weights. The indicator can be interpreted as the virtual age of the system, and can therefore be used to define age-reduction factors of different types of repair in a virtual age or age-reduction process. The state indicator is used as the time scale in a proportional intensity model. In this way, the joint impact of different repair strategies and covariates on the system failure intensity can be evaluated. This relationship is then used to address the question of which subsystems to replace whenever a system comes in for repair and when to set the preventive inspection/repair interval, in order to minimize the expected costs per unit time until the next inspection and/or repair. A numerical and a practical example are given.