Opportunity-based age replacement with different intensity rates
Opportunity-based age replacement with different intensity rates
复制标题
DOI：
10.1016/s0895-7177(03)90145-2
复制
发表时间：
2003-12
影响因子：
--
通讯作者：
T. Satow;S. Osaki
中科院分区：
文献类型：
--
作者：
T. Satow;S. Osaki
本文考虑了一个具有不同强度率的基于机会的年龄更替模型。大多数的文章假设机会是按照一个齐次泊松过程产生的，其中的强度率不随时间而变化。然而，社会，经济和物理环境可以改变强度率。我们假设强度变化率在特定的年龄。机会的出现与组件的故障无关。预防性替换在年龄T之后的第一个机会进行。如果部件发生故障，则立即更换。我们推导出无限时间范围内单位时间的期望成本。导出了使单位时间期望费用最小的最优策略。最后给出了数值例子。
This article considers an opportunity-based age replacement model with different intensity rates. Most of the articles suppose that opportunities are generated according to a homogeneous Poisson process, where the intensity rate does not change with time. However, social, economical, and physical environments can change the intensity rate. We suppose the intensity rate changes at specific age. The occurrence of opportunities is independent to the failure of a component. Pre ventive replacement is carried out at the first opportunity after ageT. If the component breaks down then it is replaced immediately. We derive the expected cost per unit time for an infinite time horizon. An optimal policy to minimize the expected cost per unit time is derived. Finally, numerical examples are given.