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261.
针对战时装备维修保障任务重、修理时间有限以及维修保障力量类型与待修装备损伤需求不匹配,难以实现战场精确保障的问题,进行了战时装备维修保障力量多目标行动控制研究。考虑修理时间窗、装备损伤状态、维修保障力量类型与维修保障能力变化以及非遍历性等复杂约束,构建了以装备重要度总和、修竣装备总和以及超出修理时间窗时间总和为目标的维修保障力量多目标抢修行动控制模型。对带精英策略的非支配排序遗传算法进行改进,结合变邻域搜索算法加强算法的局部搜索能力,设计了改进变邻域搜索和非支配排序遗传算法的混合算法实现模型求解,并通过示例验证了模型及算法的合理性和有效性。 相似文献
262.
刘建国 《军械工程学院学报》1995,(4)
以“以可靠性为中心的维修分析”(RCMA)在典型装备的应用实践为例,论述了现役装备进行RCMA的必要性和可能产生的效益及RCMA的过程,提出了现役装备RCMA的特点和正确分析的措施。 相似文献
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对某型机械装备基层级修复性维修时间进行了统计分析,确定了维修时间的分布形式、分布参数及各种维修时间参数值。 相似文献
264.
战损装备维修保障仿真及能力评估 总被引:1,自引:0,他引:1
阐述了利用仿真方法进行维修能力评估的重要性和必要性,分析了战场装备维修保障活动的主要内容,建立了基于计算机的装备维修保障过程仿真模型,提出了评估装备维修保障能力的几个指标,同时还给出了某次战斗装备损坏与维修保障能力评估的示例。 相似文献
265.
We consider an integrated usage and maintenance optimization problem for a k‐out‐of‐n system pertaining to a moving asset. The k‐out‐of‐n systems are commonly utilized in practice to increase availability, where n denotes the total number of parallel and identical units and k the number of units required to be active for a functional system. Moving assets such as aircraft, ships, and submarines are subject to different operating modes. Operating modes can dictate not only the number of system units that are needed to be active, but also where the moving asset physically is, and under which environmental conditions it operates. We use the intrinsic age concept to model the degradation process. The intrinsic age is analogous to an intrinsic clock which ticks on a different pace in different operating modes. In our problem setting, the number of active units, degradation rates of active and standby units, maintenance costs, and type of economic dependencies are functions of operating modes. In each operating mode, the decision maker should decide on the set of units to activate (usage decision) and the set of units to maintain (maintenance decision). Since the degradation rate differs for active and standby units, the units to be maintained depend on the units that have been activated, and vice versa. In order to minimize maintenance costs, usage and maintenance decisions should be jointly optimized. We formulate this problem as a Markov decision process and provide some structural properties of the optimal policy. Moreover, we assess the performance of usage policies that are commonly implemented for maritime systems. We show that the cost increase resulting from these policies is up to 27% for realistic settings. Our numerical experiments demonstrate the cases in which joint usage and maintenance optimization is more valuable. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 418–434, 2017 相似文献
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Block replacement and modified block replacement policies for two‐component systems with failure dependence and economic dependence are considered in this paper. Opportunistic maintenance policies are also considered. Where tractable, long‐run costs per unit time are calculated using renewal theory based arguments; otherwise simulation studies are carried out. The management implications for the adoption of the various policies are discussed. The usefulness of the results in the paper is illustrated through application to a particular two‐component system. © 2002 Wiley Periodicals, Inc. Naval Research Logistics, 2003 相似文献
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