基于eM-Plant的FMS仿真建模技术研究

介绍了常用的FMS仿真建模方法，并分析了其特点。提出了结合活动循环图ACD法，利用eM—Plant软件进行离散事件仿真的建模方法。针对某汽车变速箱柔性生产线，建立了FMS仿真模型，并对不同的调度策略进行了仿真。试验证明，该方法高效、合理。     

基于Anylogic的FMS的仿真系统研究

介绍了常用的FMS仿真建模方法,并进行了分析.提出了应用Anylogic仿真建模的方法.针对某轴类零件的加工过程,建立了FMS仿真模型,将FMS加工的过程抽象成一个一个的模块.AnyLogic是一个专业虚拟原型环境用于设计包括离散连续和混合行为的复杂系统,AnyLogic能够快速地构建被设计系统的仿真模型虚拟原型和系统的外围环境,试验证明此方法合理有效.     

基于Flexsim仿真的FMS车间级控制系统开发

在研究车间级控制系统与仿真控制理论的基础上,构造了基于仿真的FMS车间级控制系统模型,并结合北京交通大学教学型FMS,在Flexsim中进行系统建模,完成了该FMS的车间控制系统的设计与开发,实现了仿真和实际控制逻辑的共用.     

FMS调度与控制的统一建模与集成设计

分析了FMS调度与控制统一建模与集成设计的必要性，从FMS运行过程的IDEF0功能建模入手，建立了基于模块化彩色赋时Petri网（CTPN）的FMS调度与控制的统一模型。该模型不仅可描述FMS的调度问题，而且能表达FMS的运行控制逻辑与仿真，从而为FMS控制系统的集成设计奠定了基础。为简化FMS控制系统的设计，提出了虚拟工作站的概念与方法，将FMS控制器的部分控制功能下放到低层的工作站控制层。基于上述CTPN统一模型，开发了FMS调度与控制的集成设计原理和方法。     

基于Petri网的柔性制造系统建模的调度算法

针对柔性制造系统(FMS)建模中存在的问题,通过分析FMS的组成和特点,提出了基于赋时对象Petri网的建模方法.该方法集中了Petri网和面向对象技术的优点,利用赋时对象Petri网,建立了FMS的资源对象模型和动态行为模型.同时分析了传统调度算法的优缺点,在传统调度算法的基础上提出了时间-A搜索算法,该算法能有效地解决了FMS仿真时的调度问题,使得加工路径代价较低,同时避免了A搜索算法搜索节点多、搜索效率低的弊端.     

板材FMS基于规则的面向对象Petri网建模

基于柔性制造系统（FMS）的运行特点，提出了基于规则的面向对象扩展着色赋时Petri网建模方法，该方法集中了面向对象技术和Petri网的优点，并融系统决策规则于模型中，利用该方法建立了板材FMS的模型，为系统仿真和调度研究创造了条件。     

嵌入式柔性加工系统(FMS)仿真调度专家系统的研究

本文根据FMS仿真的特点,对嵌入式FMS运行仿真专家系统的结构、控制策略进行了研究。并讨论嵌入调度专家系统在FMS运行仿真与FMS运行控制系统中的应用。     

基于有色Petri网的FMS生产系统的研究

运用有色Petri网对FMS柔性生产系统进行建模,在深入研究Petri网和扩展Petri网相关理论的基础上,从整个生产系统的控制功能方面验证了利用Petri网所建立系统模型的正确性。再在CPNTools环境下对生产系统模型进行了仿真,通过对生产系统仿真模型运行状态的跟踪,发现了具体导致生产系统运行出现死锁状态的原因,并提出相应的改进方法,该方法成功地应用于FMS生产系统的整个加工过程中。     

基于EHLGEP-N的柔性制造系统的建模

柔性制造系统（FMS）是复杂离散事件动态系统.利用EHLGEP-N模型,对FMS建模,引入了全局库所G,使模型有了智能优化的思想,既提高了FMS优化调度的整体性能,又使调度具有较强的可观性.     

基于离散事件仿真的FMS生产策略优化

柔性制造系统(Flexible Manufacturing System,FMS)生产过程较为复杂,具有随机性和动态性,难以通过数学解析方法获得优化的生产策略方案。采用离散事件系统仿真的方法寻求FMS的优化生产策略,基于PlantSimulation软件建立FMS的生产仿真模型,以生产周期和设备利用率为评价指标,通过对投产方式、AGV数量、AGV速度及缓冲容量等参数进行不同组合仿真试验,最终获得了最佳的生产策略方案。证明了采用离散事件仿真可以有效地优化FMS的生产策略,提升FMS的生产性能。     

Modeling FMS with decision Petri nets

Decision point extended timed Petri nets or decision Petri nets (DPN) are introduced as an extended modeling framework for FMS performance evaluation. The decision point extension allows the explicit modeling of the control of the flow of tokens in timed Petri nets and hence represents the control of the flow of material, resources, and information in FMS. Further, the concept of a bounded transition is proposed to conveniently model the blocking logic in an FMS with limited buffer capacities. The motivation to present these conventions is to develop a user-friendly graphic model to represent FMS designs for analysis by discrete event simulation. DPN affords concise models that can be conveniently developed and easily transformed into discrete event simulation models. With the help of a simple FMS example, which includes a number of part types, loading rules, dispatching rules, and probabilistic branching (at an inspection station), we illustrate the DPN model development. As an illustration of the ease with which it can be tranformed into a simulation model, we have developed a generalized simulator called ROBSIM and outline here its methodological basis. The proposed concepts should be of interest to users of discrete event simulation in FMS design or elsewhere to tap the potential of basic Petri net concepts for graphic representation and specification purposes. In particular, our work should encourage other researchers to develop extensions relevant to their own areas of interest.     

An Assessment Framework for Optimal FMS Effectiveness

Equipment failures in an FMS are significant to performance and can lead to costly, incorrect decisions. Fortunately, effectiveness measurement techniques can be mapped to clever modeling frameworks to help predict, track, and then improve upon the FMS performability or mission effectiveness, and improve maintenance. This article provides sources and guidelines for efficient and effective FMS modeling, a framework for applying the modeling to predict the impact on customers from their point of view, and a method for tying it all together for improving the FMS effectiveness. It is not enough to simply examine the working and failed states of an FMS or even to calculate common reliability metrics. It is necessary to consider the FMS as a whole, and that system includes the needs of the customer and the business. It is also necessary to be purposeful about the measures of performance selected and to support the measures of effectiveness.In this article, we present: a framework for considering customer needs in the measures of effectiveness for FMS; modeling approaches for solving for effectiveness measures; and an example to show how to apply it to an FMS, to improve it or plan for meeting specific customer needs.     

Modeling and analysis for a kind of flexible manufacturing system involving time factors

Time control and management are important in flexible manufacturing systems (FMS). The time to finish the machining unit is uncertain because of the uncertainties of the workpieces, so the whole time to finish the FMS is also variable. In order to reduce the time to finish for the whole FMS to improve efficiency, the modeling and analysis method for this timing kind of FMS based on standard Petri net is proposed. The modeling method is a mapping from the machining units to the component of a Petri net, and the timing factors are represented by a timing function on the place set. With the Petri net model obtained and its reachability graph, the timing factors influencing the implementation of the FMS are analysed and presented. In addition, the method is obtained to find the best state line for the implementation of the FMS.     

面向对象的FMS机床布局设计

首先提出一种面向对象的ＦＭＳ统一建模方法,在该模型框架下ＦＭＳ各子问题以一种相互关联和集成的方式加以解决。以ＦＭＳ设计中的机床布局为例,介绍了在这种面向对象的模型框架下机床布局设计问题的建模、求解及面向对象的实现方法。     

智能制造中多Agent系统的研究与应用

多 Agent系统理论是智能制造的理论基础。本文首先对 Agent模型的认识进行了概括与总结。然后针对智能制造系统的特点 ,提出了建立多 Agent系统模型的约束条件。并以 FMS为例 ,给出了建立多 Agent系统仿真模型的步骤。最后 ,提出了对于智能制造中多 Agent系统研究应该集中注意的几个关键性问题     

MODELING OF FMS BASED ON UML AND OPNS

0INTRODUCTIONFleXiblemanufactunngsystem(FMS)isanadVancedmanufaeturingtechnology.FMScontrolsoftwaresupportingbothsimulationandcontrolimplementationisp~unttoexploitthefullbenefitsofFMS.Thecontrolsoftwarehastobedesignedtomeetthereal-timeconstraintsofaPnductionsystemanddynamicallychangingneedsOfthemalket.Hence,developmentmethodologiesarecriticaltodesignandimplementreusableanddrintainablecontrolsoftwaretorealizethefullbenefitsofFMS.ItisdifficulttouseanyonemethodtomodelsocomplexsystemasF…     

An Object-Oriented Approach for Flexible Manufacturing Control Systems Analysis and Design Using the Unified Modeling Language

In reacting to global competition and rapidly changing customer demands, industrial business organizations have developed a strong interest in flexible automation. The aim of flexible automation focuses on achieving agility in handling uncertainties from internal or external environments. Modeling complex structures, promoting reuse, and shortening the development time cycle are particularly significant aspects in the analysis and design of CIM systems, where heterogeneous elements have to be integrated in a complex control architecture. The design methodology for FMS control software involves the abstraction of an FMS and the estimation of the system performances. The aim of this activity is to suggest the optimal configuration of an FMS for given specifications, through simulation tools. In the software engineering field, object-oriented (OO) approaches have proven to be a powerful technique with respect to such aspects. The unified modeling language (UML), by using OO design methodologies, can offer reusability, extendibility, and modifiability in software design. Also, it bridges the gap that exists between the OO analysis and design area and the area of OO programming by creating an integrative metamodel of OO concepts. The specific goal of this paper is to formulate a new methodology for developing reusable, extendible, and modifiable control software for an FMS in an object-oriented environment. It is demonstrated that, with few diagrams, UML can be used to model such systems without being associated with other modeling tools.     

一种面向对象的Petri网及其应用研究

提出了一种面向对象的Petri网(OPN),较好地避免了一般Petri网建模时经常产生状态爆炸的问题,并具有较好的模块性、重用性及可维护性。通过利用OPN建立一个FMS模型的实例,说明了OPN的有效性和强大的建模能力。OPN为离散事件系统的建模提供了一种强有力的工具,具有良好的应用前景。     

柔性制造系统可靠性分析的GOOPN模型

提出了一种用于FMS可靠性分析的扩展的面向对象的Petri网模型 ,该模型引入了公共库所及对象的模块表示 ,具有较好的模块性、重用性及可维护性 ,能够反映FMS的动态柔性特点。文中给出了GOOPN的定义 ,并针对一个FMS进行了建模。