基于粒子群算法的半导体制造设备预维修调度

对半导体制造设备的预维修调度问题进行了研究,建立了半导体制造设备预维修调度的数学模型,分别提出了用于求解该问题的启发式方法和粒子群算法方案,阐明了两种算法方案的具体实现过程。通过对仿真实例进行计算和结果比较,表明了粒子群算法优于启发式方法,取得了不错的优化效果。     

Gamma Approximation for Preventive Maintenance Scheduling

This paper presents an approximation model for determining minimum cost preventive maintenance schedules where accurate failure data are not available except the “average” (mean) and the “typical” value (mode) of the component lifetime.     

设备维护外包策略及其对维护计划组织的影响

根据设备维护流程分析,提出了设备维护外包的三种外包策略--购进型外包、选择型外包和完全型外包.从组织结构、计划制定和资源协调三方面分析了设备维护外包的不同策略对设备维护计划组织的影响.     

Determination of Coordinated Maintenance Scheduling Frequencies for a Group of Machines

An economic model of maintenance planning for a machine shop is developed. Maintenance can be performed on an individual machine or the entire group of machines simultaneously. The coordinated maintenance on the group would save on the fixed costs associated with separate overhauls. The frequencies of maintenance on each machine within two consecutive coordinated overhauls and the time between these coordinated overhauls is determined. The resulting model selects a solution that is close to the minimum of the total cost of production and maintenance.     

装甲装备器材保养包装平台的构建

装甲装备器材保养包装是器材储备供应体系的重要环节,是保证器材质量完好、提高器材保障能力的重要技术措施。以保养包装新模式为理论指导,研制了自动化保养设备及系列保养包装材料,制定了保养包装规范,开发了质量管理信息系统,在此基础上,设计并建设了装甲装备器材保养包装平台,全面提升了装甲装备器材保养包装质量与效能。     

Analysis of the Improvement Methods for Equipment Maintenance Support

According to military requirement, and based on the problems of equipment maintenance support methods in high-tech battles, each element supporting equipment maintenance is analyzed, and the methods for improving equipment maintenance are proposed.     

Maintenance Scheduling with Delay-time Modelling: An Overview

Effective maintenance is a key for infrastructures′ high operational reliability. The integration of corrective repairs and schedule-based failure preventions has been a mainstream of modern maintenance, and an associated policy-making technique, delay-time modelling, is overviewedin this paper for optimising the maintenance cost-efficiency in different practical scenarios, including imperfect, opportunistic and nested maintenance. A few typical examples of its applications in minimising maintenance operating expenses are discussed in this paper and their results are explained to better demonstrate the benefits of the technique. This work aims to prepare for the future applications of the delay-time modelling in railway maintenance policy making.     

集成预防性维护计划的单机调度蚁群优化研究

尽管生产调度与预防性维护计划密切相关,且其共有目标都是提高机床的利用率,但是存在着调度优化上的冲突.为了综合考虑单机情形下的生产调度与预防性维护计划,提出了一种改进的蚁群优化算法,用于解决以总计作业加权完成时间和总计维护成本最小为双目标的生产调度与预防性维护计划的集成模型.同时进行了大量的仿真实验,比较结果表明提出的蚁...     

基于FMEA的污水排放设备维护策略

以污水排放系统的设备为研究对象,采用系统失效模式及后果分析方法(系统FMEA)区分设备的关键等级,综合运用设备失效模式及后果分析方法(设备FMEA)确定各设备的主导故障,定制不同设备的维护策略.通过一具体实例说明运用FMEA定制维护策略的全过程.     

A Bayesian Approach to the Scheduling of Preventive Maintenance

This paper presents a Bayesian model for determining minimum cost rate preventive maintenance schedules where historical data are not available. Also, a model to determine appropriate maintenance budgeting policies is presented and discussed.     

A Computer-Aided Graphical Procedure for Scheduling Preventive Maintenance of Electric Power Generating Units

This article attempts to show how computer graphics can assist in computerized development of project-type schedules as exemplified by preventive maintenance scheduling in the electric power industry. The method is equally applicable to the scheduling of maintenance activities in general or, with modification, to devising shift schedules for personnel such as police, nurses, and toll collectors who must provide 24-hour service with changing demand levels. A hand procedure currently used by electric utilities for creating preventive maintenance shutdown schedules for generator units is first described. A mixed integer programming model of the problem is given which is computationally intractable for any realistic-size problems. The same problem using man-machine interaction via a graphics terminal to overcome the computational limitations of the mathematical formulation is then described and illustrated. A proposed extension to improve the speed of solution is also described.     

Research on Selection of Equipment Maintenance Modes

1 IntroductionEquipment failure will inevitably occur during a normal production process.Severe equipment failurewill conduce long time deadlock of a production system,lower production efficiency,and add extracost on products.Effective strategy should be adopted so as to reduce failure influence on equipment,reduce production cost and enhance market competition of products.In recent years,high-tech pro-duction equipment are improved,and production rates are more rapid.For the sake of maintain…     

Using Utility Functions for Aggregate Scheduling in Health Maintenance Organizations (HMO'S)

The multiple attributes and characteristics of the services provided by a health maintenance organization (HMO) are reduced to a common unit of measurement by means of utility functions. This reduction allows the development of a micro-economic aggregate planning model that can be used both for the short and the long term to make optimizing decisions on system inputs and resource allocations. The model is designed to deal with the common revenue- and budget-constrained situations and is directed to maximize the level of service provided by the HMO, according to the management's perceptions of the system characteristics. An empirical short term application of the model is presented and compared against actual management decisions. Data needs and implementation requirements are discussed, along with the managerial implications of this approach.     

考虑维修时间和惩罚的租赁设备维护策略研究

针对租赁设备维修时间的不确定性,建立考虑维修时间随机性的等周期预防性维护策略。该策略在考虑租赁设备维修时间随机性的同时,综合考虑对出租方的维修惩罚,包括维修时间惩罚、故障总次数惩罚以及可用度惩罚等因素对总成本的影响。从出租方的角度出发,建立以出租方总成本最小为目标的预防性维护策略优化模型。用MATLAB仿真求解出模型的最优预防性维护计划。算例分析表明,考虑租赁设备维修时间随机性和维修惩罚使租赁设备的维护更符合实际情况,能为租赁企业提供有效的设备维护策略。     

平行机系统生产调度与维护计划联合优化

针对平行机系统中生产调度和维护计划的联合决策问题,假设随机故障服从威布尔分布,将作业在设备上加工位置以及设备上预防性维护位置作为决策变量,以最小化最大完工时间和最小化单位维护成本作为优化目标建立了多目标优化模型.建立了基于混合编码的遗传算法,针对不同编码类型采用合适的遗传算子,并引入了自适应交叉和变异概率使算法在收敛速度和求解精度上得到较好平衡.通过与枚举算法对比,证明遗传算法具有较好的时间效率和求解精度.通过与独立决策模型对比,证明联合优化模型能更好地解决联合优化问题,提高企业整体效益.     

生产调度与维护集成的多目标Lorenz非劣遗传优化

研究了一种单机环境下集成生产和维护的双目标优化调度问题。机床的故障间隔时间和平均维修时间服从指数分布,同时结合加工序列相关准备时间。预防性维护活动不能与作业加工同时进行,但与准备时间不相冲突。调度目标是同时最小化作业总计完成时间和机床不可得性。在问题建模的基础上,构造了一种基于Lorenz非劣关系的分类遗传算法(表示为L-NSGA-Ⅱ),详细设计了算法的核心部分。最后,通过大量计算实验,将L-NSGA-II算法与NSGA-II算法进行了比较分析,说明了L-NSGA-II算法的有效性。     

浅谈医疗设备的维修安全问题

分析介绍了维修工作中需要注意的几个安全问题,包括了维修中的医疗设备质控与维修人员的自我保护两方面。     

水力发电设备检修计划管理研究

分析了目前电厂检修计划管理中存在的问题,提出了一个全面的解决方案,并对方案中的核心部分进行了理论上的探讨.方案的目的在于改进检修计划管理的方式,减轻管理工作强度,提高工作效率,从而缩短检修工期和降低检修成本.     

分布式生产设备检修计划管理信息系统研究

提出基于网络计划技术、项目管理技术、互联网技术、计算机图形技术的针对设备检修计划管理业务的分布式检修模式,从技术上提高检修计划管理水平,并实现其软件系统模型.     

Modeling and Analysis of Complex Equipment Maintenance Dynamics

An equipment maintenance system is naturally a complex dynamical system. The effective mamanagement must be based on the knowledge of the system＇s intrinsic dynamics. And the strueture of the maintenance system determines its behavior. This paper analyzes the basic structures and elements of a maintenance system for complex multi-components equipment. The maintenance system is considered as a dynamic system whose behavior is influenced by its structure＇s feedback and interaction, and the system＇s available resources. Building the dynamical model with Simulink, we show some results about the maintenance system＇s nonlinear dynamics, ods. The model can be used for understanding and which operational adjustments of maintenance which are never given by stochastic process methdetermining maintenance system behavior, towards n of maintenance requirements and timely supply of maintenance resources can be made in a more informed way.