车辆装备保障分队单兵训练质量组合评价分析

针对当前部队车辆装备保障分队单兵训练质量评价中所存在的问题和不足,综合运用集对分析一四元联系数理论、马尔可夫链模型和熵权双基点法,尝试提出一种新的评价分析方法——SHE组合评价分析法,排除单兵原有基础差异对年度训练考核成绩的影响,考虑评价对象之间的情感因素和分队训练条件对单兵训练质量的影响,从而使评价显得更加客观、公正和公平．最后,结合算例,分析说明了此方法的具体应用．     

考虑机内测试诊断的维修任务模型及算法

机内测试设备（Built—in Test Equipment,BITE）在复杂系统中的应用越来越多,由于BITE诊断存在不确定性,就可能导致无效的维修．采用一种考虑BITE诊断不确定性的维修任务选择模型及其求解算法,以在一定置信水平下获得最佳的维修方案．首先,给出了考虑BITE诊断不确定性的维修任务选择问题的假设条件,建立了非线性的、离散的随机机会约束规划模型．其次,设计了求解随机机会约束规划模型的一种基于随机模拟的粒子群算法,包括粒子的表示、适应度函数、更新公式、算法框架等．最后,给出了具体实例,证明了模型与算法的有效性．该模型适用于管理人员在考虑BITE诊断不确定性的情况下做出合理的维修任务选择决策．     

着色Petri网的装备维修工艺建模

通过对装备维修工艺过程及其特点的分析,确定了基于Petri网建模方法的维修工艺优化过程模型。首先依据基本的维修拆卸规则和Petri网建模规则建立了工序Petri网模型,在此基础上以维修人员和通用维修机、工具为主要资源约束建立了维修工艺过程CPN模型。最后,通过装甲装备某部件维修的工艺过程仿真及数据分析确定了该建模方法的有效性和实用性。CPN较好地描述了装备维修工艺过程中的选择、冲突等事件,对指导维修工艺实践和工艺优化起到了积极的作用。     

装备维修保障的多目标优化模型研究

通过对装备维修保障问题进行分析,针对目前研究的目标单一,就修复后的加权作战时间和装备尽可能短的延误双重目标加以研究,建立了维修保障的多目标优化模型,并给出了模型的求解算法,从而弥补了这些不足,使维修保障更加合理。最后,算例表明模型的求解方法简单,计算时间较短,是一种便于实现的好算法。     

一种防空导弹全任务维修训练模拟器设计

针对当前部队缺乏装备维修训练手段的问题,基于"虚实结合"思想设计了一种防空导弹武器系统全任务维修训练模拟器。采用半实物仿真技术构建了基于以太网的多PC分布式体系结构;采用虚拟现实技术构建了虚拟维修训练环境;基于"虚拟维修中测量使用真实信号"理念采用"虚拟维修计算机+任意波形发生器"实现了战车测试信号产生;提出了"维修训练融入操作训练"的训练模式,实现了操作训练和维修训练的有效无缝连接。通过在教学实践中使用证明,该系统结构合理,可靠性高,扩展性好,并对其他复杂装备的维修训练模拟器研制有指导意义。     

Optimal production and maintenance policy for imperfect production systems

A joint optimization of the production run length and preventive maintenance (PM) policy is studied for a deteriorating production system where the in‐control period follows a general probability distribution with non‐decreasing failure rate. In the literature, the sufficient conditions for the optimality of the equal‐interval PM schedule is explored to derive an optimal production run length and an optimal number of PM actions. Nevertheless, an exhaustive search may arise. In this study, based on the assumption that the conditions for the optimality of the equal‐interval PM schedule hold, we derive some structural properties for the optimal production/PM policy, which increases the efficiency of the solution procedure. These analyses have implications for the practical application of the production/PM model to be more available in practice. A numerical example of gamma shift distribution with non‐decreasing failure rates is used to illustrate the solution procedure, leading to some insight into the management process. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

Flexibility and complexity in periodic distribution problems

In this paper, we explore trade‐offs between operational flexibility and operational complexity in periodic distribution problems. We consider the gains from operational flexibility in terms of vehicle routing costs and customer service benefits, as well as the costs of operational complexity in terms of modeling, solution methods, and implementation challenges for drivers and customers. The period vehicle routing problem (PVRP) is a variation of the classic vehicle routing problem in which delivery routes are constructed for a period of time; the PVRP with service choice (PVRP‐SC) extends the PVRP to allow service (visit) frequency to become a decision of the model. For the periodic distribution problems represented by PVRP and PVRP‐SC, we introduce operational flexibility levers and a set of quantitative measures to evaluate the trade‐offs between flexibility and complexity. We develop a Tabu Search heuristic to incorporate a range of operational flexibility options. We analyze the potential value and the increased operational complexity of the flexibility levers. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Optimal joint preventive maintenance and production policies

We study joint preventive maintenance (PM) and production policies for an unreliable production‐inventory system in which maintenance/repair times are non‐negligible and stochastic. A joint policy decides (a) whether or not to perform PM and (b) if PM is not performed, then how much to produce. We consider a discrete‐time system, formulating the problem as a Markov decision process (MDP) model. The focus of the work is on the structural properties of optimal joint policies, given the system state comprised of the system's age and the inventory level. Although our analysis indicates that the structure of optimal joint policies is very complex in general, we are able to characterize several properties regarding PM and production, including optimal production/maintenance actions under backlogging and high inventory levels, and conditions under which the PM portion of the joint policy has a control‐limit structure. In further special cases, such as when PM set‐up costs are negligible compared to PM times, we are able to establish some additional structural properties. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

舰空导弹武器系统转火射击能力研究

讨论了舰空导弹武器系统转火射击的概念,分析了影响转火射击能力的主要因素,提出了舰空导弹武器系统射击周期、最大射击周期、最小射击周期概念,并对其数学模型进行了详细分析。     

基于可拓工程方法的维修保障系统效能评估研究

分析了维修保障系统效能的影响因素,应用可拓工程方法建立了维修保障系统效能多指标参数的物元可拓评估模型,以定量的结果对维修保障系统效能进行了评估分级,并与层次分析法和突变评价法的结果进行了比较,结论基本一致.为维修保障系统效能评估问题寻求出一种新的方法,其评估结果可为决策提供定量依据.