CONWIP生产控制方法

介绍ＣＯＮＷＩＰ生产控制方法的产生,工作原理,优点,研究现状及未来的研究方向。有效的生产控制系统是指在正确的时间,以有竞争的价格生产出正确的产品,继ＭＲＰ－Ⅱ和Ｋａｎｂａｎ之后,ＣＯＮＷＩＰ生产控制方法引起人们的广泛重视,成为生产控制方法研究的热点。     

面向对象方法在FMS仿真系统中的应用

该文主要以面向对象的程序设计方法为研究工具，描述了ＦＭＳ仿真系统中的基本活动和程序设计方法。     

FMS物流系统的调度与控制

本文针对FMS物流系统，提出了一种基于任务分类的逐层细化调度与控制策略。并在上海第四机床厂箱体零件柔性制造系统（SJ－FMS）中加以具体应用和软件实现。结果表明，这种调度与控制策略能够有机地将调度的计划性和随意性相结合，保证控制的实时性，具有实用价值。     

FMS控制系统的结构设计研究

本文首先简介了柔性制造技术，然后进一步分析了柔性制造控制系统的结构设计问题，讲述了FMS的模型及其工作原理，及各个功能模块的功用和内部组织。最后对FMT及FMS的发展前景做出了展望。     

一个原型支持工具及其在FMS仿真中的应用

柔性制造系统是一类复杂的异步并发系统，其设计开发需要仿真手段的辅助支持。本文介绍了一个原型支持工具ＰＩＯＮＥＥＲ－Ｉ及其在军用武器系统柔性加工中心仿真中的应用。     

PROFIBUS在数控车间FMS控制中的应用

群控(DNC)是柔性制造系统(FMS)控制的一个重要组成部分．本文介绍了基于Profibus现场总线网的数控车间FMS控制系统的组成原理，信息模型，实现方法。DNC实施方案，给出了该系统的结构与特点，较洋细地说明了MIS软件功能。该方案适合各种FMS系统中的DNC控制。并有利于FMS系统的扩展。     

FMS—500物料系统的监控管理

介绍由计算机与ＰＬＣ构成的二级计算机控制系统，包括系统的设计、实现与通信。该系统对ＦＭＳ－５００物料系统进行监控管理，保证了物料系统在ＦＭＳ中可靠稳定运行。     

A CONWIP model for FMS control

Production inventory control is one of the most important aspects of a flexible manufacturing system (FMS) design. CONstant Work In Process (CONWIP), which is a hybrid of push-and-pull type systems, offers an alternative to effective utilization of the expensive FMS equipment while still meeting customer requirements. In the selection of an FMS control method, material handling often becomes one of the capacity constraints which forms the basis of various research interests. In this paper, a structure-based model for a CONWIP-controlled FMS is proposed, and within it, the node type characteristics concept is used to describe the constraints in FMS. Furthermore, simulation is used to determine the card number based on the structure-based model. The simulation results demonstrate that the model is suitable for the design and operation of FMS. The model can be used as a manufacturing execution system of enterprise resources planning. An architecture for this integrated design based on Internet/Intranet systems is also proposed.     

多阶段CONWIP 系统流通卡分布的确定方法

在ＣＯＮＷＩＰ系统中,流通卡分布是系统有效运行的关键因素。针对多阶段ＣＯＮＷＩＰ系统,提出了基于遗传算法和仿真的流通卡分布的确定方法。研究实例表明,基于遗传算法获得的结果是合理的,并且节约了计算时间。     

柔性制造系统（FMS）的一种建模方法及最优控制策略

本文针对ＦＭＳ的调度问题，考虑到多台机器、机器不可靠及缓冲库容量有限等特点，在满负载平衡的条件下，建立了一种近似的布朗网络模型，然后基于求解这个模型的最优控制问题而得到的最优队长和最优空闲时间，提出了一种最优控制策略，包括排序策略和输入控制策略。因为不涉及随机变量的分布类型，所以本文的方法适用于一般的ＦＭＳ。     

可重构容错多机FMS控制系统YH-MCS

本文介绍了我们设计和实现的可重构容错多机柔性制造控制系统ＹＨ—ＭＣＳ的软硬体系结构和技术特点。     

多重入生产线的CONWIP投放方法研究

CONWIP（Constant Work in Process）是一种基于拉式（pull）控制物料投放的方法。最初应用于Flow Shop式生产系统,通过限制半成品数量以控制生产线运作提供可靠的制造周期。然而,原始的CONWIP方法不能适应半导体这类同一加工站多重人的生产系统。该文根据半导体生产线多重人的特性,提出与多重人瓶颈相结合的CONWIP投放方法,不仅控制生产线中的半成品数量,并且结合了TOC（Theory of Constraints）思想,从而提高生产线的性能。最后,通过一些仿真证明了方法的有效性。     

CONWIP based control of a lamp assembly production line

Efficient and effective production control systems are very important for manufacturing plants. CONWIP, one of these production control systems, has a high potential of becoming the best one available because it suits a variety of production environments and is easy to implement. In the following paper, we compare the single-loop and multi-loop CONWIP production control systems for an actual lamp assembly production line producing different kinds of products with discrete distribution processing time and demand. A model is formulated with respect to total cost and service level. A novel rule-based genetic algorithm (GA) approach is proposed for the multi-loop CONWIP system to find the optimum parameter setting. The results have shown that the single-loop CONWIP production control system is more efficient than the multi-loop system. It can greatly decrease the total cost and the WIP (Work-In-Process) with zero shortage probability.     

Distributed artificial intelligence for FMS scheduling, control and design support

The aim of this paper is to point out some of the abilities of Distributed Artificial Intelligence in the domain of scheduling, control and design support of Flexible Manufacturing Systems. A distributed management system is proposed, based on Distributed Problem Solving, sub-field of Distributed Artificial Intelligence. The basic concepts are the concept of Resource Management Entity to ensure local optimization of the management of resources and the concept of cooperation to provide ability for global and local consistency. The management of resources is associated to activities such as scheduling, control or simulation. It is shown that this system computes not only practicable schedulings, but also presents, on the one hand, some abilities in supporting the design and the robust optimization of Flexible Manufacturing Systems, and, on the other hand, some abilities in supporting real-time control of such systems. This enables, in future works, to design a Distributed Decision Support System for integrated scheduling, control and design support of production systems.     

供应链存储系统无线射频识别使能的定量在制品法控制策略仿真

无线射频识别(radio frequency identification,RFID)技术的出现为库存控制策略的创新提供了一条有效的途径.本文利用RFID技术,将原有单个制造系统的流通卡系统推广到供应链的多级库存网络中,设计了RFID使能的电子流通卡系统.基于电子流通卡,实现了RFID使能的定量在制品法(constant work-in-process,CONWIP)控制策略;并建立了CONWIP控制策略的分销网络模型.为比较和验证CONWIP控制策略性能,开发了三级分销网络仿真系统,使用该系统,将其与RFID使能的(r,Q)策略进行比较,验证了CONWIP策略在一定条件下,能够有效降低存储成本、提高服务水平.