RANDOM AND AGE REPLACEMENT POLICIES
RANDOM AND AGE REPLACEMENT POLICIES
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DOI：
10.1142/s0218539310003652
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发表时间：
2010-02
期刊：
影响因子：
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通讯作者：
Mingchih Chen;S. Mizutani;T. Nakagawa
中科院分区：
文献类型：
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作者：
Mingchih Chen;S. Mizutani;T. Nakagawa
本文针对随机工作时间的运营单元提出了随机和年龄更换策略。首先，在计划时间T或工作时间结束时（以先发生者为准）发生故障之前更换单元。得到了期望成本率。接下来，作为一个扩展模型，在故障之前在工作次数N或计划时间T更换单元。分析讨论了使期望费用率最小的最优策略，并给出了数值例子。两个修改后的模型，其中该单元是在第一次完成的工作时间超过时间T或在N号，它是在时间T或N号，以最后发生的，被认为是更换。此外，我们表明，这对应于一个累积损伤模型取代冲击与工作。最后，提出了一个调度N个工件完成所需时间的优化问题。
This paper proposes a random and age replacement policy for an operating unit which works at random times. First, the unit is replaced before failure at a planned time T or at the completion of a working time, whichever occurs first. The expected cost rate is obtained. Next, as one extended model, the unit is replaced before failure at a number N of working times or at a planned time T. An optimal policy which minimizes the expected cost rate is discussed analytically, and its numerical example is given. Two modified models, where the unit is replaced at the first completion of the working time over time T or at number N, and it is replaced at time T or number N, whichever occurs last, are considered. Furthermore, we show that this corresponds to a cumulative damage model by replacing shock with work. Finally, one optimization problem of how much time to preset for scheduling the completion of N works is proposed.