浅谈虚拟制造

虚拟制造为制造业迎接新的挑战提供了一种新的制造哲理。本文在分析现代制造环境下企业所面临的复杂性的基础上提出了虚拟制造的概念，并对其关键技术进行了详细论述。提出虚拟制造的分类，分析了虚拟制造的制造哲理及我国虚拟制造的发展策略。     

虚拟数字制造的建模与模拟研究

本文描述了虚拟数控零部件制造车间的建模与模拟结构，分析了设备模型和材料模型，虚拟车间模型，用户操作，数控零部件模型，虚拟车间模拟，模拟接口等模块的建立，讨论了虚拟数控制造的实时性和并行控制问题。     

浅谈虚拟制造

虚拟制造为制造业迎接新的挑战提供了一种新的制造哲理.本文在分析现代制造环境下企业所面临的复杂性的基础上提出了虚拟制造的概念,并对其关键技术进行了详细论述.提出虚拟制造的分类,分析了虚拟制造的制造哲理及我国虚拟制造的发展策略.     

VM技术介绍及其应用

阐述了虚拟制造的基本概念，虚拟制造的核心技术以及虚拟制造技术在制造业中的应用。     

生产系统的集成规划及案例分析

在分析以往制造系统设计存在不足的基础之上,论述面向生产工程的虚拟制造内涵、提出了虚拟制造环境下大批量生产的制造系统集成规划的解决方案,它包括系统布局规划、仿真规划和虚拟漫游规划3个阶段,各个阶段解决系统规划的不同优化问题,并以来自企业的应用案例进行分析,为企业设计优化的生产系统,减少投资风险。     

虚拟制造中的制造系统建模

为了映射真实系统与服务环境之间的相互作用，分析了在虚拟制造环境下制造系统静态模型和动态模型的建模方法，并通过生产系统预规划和动态规划过程，揭示了该模型具有的支持产品制造全过程的特性，最后阐述了原型系统的结构框架以及工业应用的成果。     

虚拟数控制造的建模与模拟研究

本文描述了虚拟数控零部件制造车间的建模与模拟结构,分析了设备模型和材料模型、虚拟车间模型、用户操作、数控零部件模型、虚拟车间模拟、模拟接口等模块的建立,讨论了虚拟数控制造的实时性和并行控制问题。     

虚拟制造中仿真技术的应用

虚拟制造系统是现实制造系统在虚拟环境下的精确映射,是利用计算机模型仿真真实系统中的物理和逻辑活动。本文指出仿真是实现虚拟制造的主要手段。仿真在制造系统中的应用按照人的介入与否分为一般仿真层和虚拟现实层。分析了两层之间的联系与区别,列出了各层仿真的主要内容和可实现的程度;介绍了目前主要的虚拟制造仿真软件;最后,给出了三维动画表示的生产线虚拟仿真的一个实例。     

虚拟再制造技术初探

虚拟再制造是实际再制造过程在计算机上的本质实现,以信息、仿真和虚拟现实等多种技术为基础,在计算机上实现再制造过程中的虚拟检测、虚拟加工、虚拟控制、虚拟实验、虚拟管理等再制造全过程的一项前沿技术。阐述虚拟再制造的定义和具体的研究层次,分析它的研究现状以及关键技术特点,探讨虚拟再制造与实际再制造和虚拟制造的关系,并与多种先进制造进行比较,最终提出虚拟再制造的应用前景。     

国家CIMS工程技术研究中心的虚拟制造基地及研究进展

介绍了国家ＣＩＭＳ中心开展虚拟制造研究的最新进展,包括所建立的虚拟制造基地的体系结构,解决的关键技术,以及结合典型产品进行虚拟制造研究所取得的初步成果。     

虚拟加工环境中标准化通信的研究与实现

通过在虚拟加工环境中实现基于MMS（制造报文规范）的标准化通令系统,探讨了虚拟制造平台实现网络集成的方法。介绍了MMS协议的内容,提出了系统的总体框架,并详细描述了基于MMS协议的通信支持系统与虚拟设备相连的服务接口系统的实现方法、框架结构和程序执行流程。     

Hybrid systems for planning and optimization of virtual assembly

Virtual assembly is the simulation of parts assembly processes by computer, analysing, evaluating and optimizing the feasibilities and procedures of assembly. It can thus avoid the potential problems and risks from designing to assembling. In this way, we can achieve the global optimization of the products and timely respond to the needs of the market. This paper presents a modelling framework for virtual assembly paths design and optimization of two objects on the basis of a class of hybrid system, which is applicable in many manufacturing environments. We propose an elementary hybrid machine containing time-driven and event-driven dynamics. We describe in detail a method of assembly paths design. The objective of optimization is evaluated in terms of time in the transition dynamics so as to make the problem more tractable. An explicit algorithm for deriving optimal assembly policies is developed. The optimal results indicate the feasibility and efficacy of the model and control algorithms.     

虚拟制造中多机器人虚拟生产平台的研究

以多机器人装配作业为背景,研究了虚拟制造中多机器人虚拟生产平台系统的几何及运动学建模,多机器人协调合作策略,多机器人工作空间分配,机器人手臂的碰撞检验和避碰以及装配线意外故障的处理等关键问题,最络构建起一个完整的多机器人虚拟生产平台。     

展望21世纪的制造业

１９９９年,一个由工程教育和制造家组成的“Ｂｌｕｅ－ｒｉｂｂｏｎ委员会”向美国国家科学研究委员会提交了一份称为“想象中的２０２０年制造前景”的报告,本文根据有关该报告的报导并参照相应资料,展望了２１世纪制造业的市场、企业,生产组成形式、人才素质,项目团队及人工智能技术要求的前景。     

Integrated Virtual Assembly Environment and its application in ship piping layout

Complex pipe layout plays an important role in ship building. Pipes prefabricating and assembling often depends on testing and rebuilding in outfitting. This leads to more workload, high cost and longer manufacturing cycles. In this paper, a new virtual assembly system called Integrated Virtual Assembly Environment (IVAE) is introduced, in which the ship outfitting can be simulated and process planning can be completed. With the help of assembly constraints management, collision detection and response, assembly sequence and paths planning, users can assemble the parts interactively in a virtual outfitting environment, just as in an actual cabin. As well as for virtual ship outfitting, IVAE can also be used in general product development. As a typical case, the pipe layout in the engine room of a 5000?M³ hydraulic dredge from Hudong-Zhonghua Shipbuilding (Group) Co., Ltd is given to test virtual ship outfitting in IVAE.     

Virtual prototyping and manufacturing planning by using tri-dexel models and haptic force feedback

This paper presents a new method of using the tri-dexel volumetric models and a haptics force feedback for virtual prototyping and manufacturing planning. In the proposed method, the initial polyhedral surface model is converted to a tri-dexel volumetric model by using a depth-peeling dexelization algorithm. In the virtual prototyping process, the tri-dexel volumetric model is updated by the swept volume of a moving cutter via a haptic force feedback interface device. A collision detection algorithm is proposed for the virtual sculpting and the pencil-cut planning with real-time haptic force feedback to the users. Tool paths are generated for machining the virtual sculpted parts via the simulation and verification on a virtual CNC machine tool before they are actually machined. Computer implementation and practical examples are also presented in this paper. The proposed method enables the haptic-aided virtual prototyping and manufacturing planning of complex surface parts.     

Virtual prototyping and manufacturing planning by using tri-dexel models and haptic force feedback

This paper presents a new method of using the tri-dexel volumetric models and a haptics force feedback for virtual prototyping and manufacturing planning. In the proposed method, the initial polyhedral surface model is converted to a tri-dexel volumetric model by using a depth-peeling dexelization algorithm. In the virtual prototyping process, the tri-dexel volumetric model is updated by the swept volume of a moving cutter via a haptic force feedback interface device. A collision detection algorithm is proposed for the virtual sculpting and the pencil-cut planning with real-time haptic force feedback to the users. Tool paths are generated for machining the virtual sculpted parts via the simulation and verification on a virtual CNC machine tool before they are actually machined. Computer implementation and practical examples are also presented in this paper. The proposed method enables the haptic-aided virtual prototyping and manufacturing planning of complex surface parts.     

Integrated design approach for virtual production line-based reconfigurable manufacturing systems

Reconfigurable manufacturing systems (RMSs) have been recognized as a new manufacturing paradigm. In light of their enhanced flexibility and responsiveness, RMSs are considered to be mostly applicable to the very dynamic and unpredictable marketplaces of the near future. However, systematic approaches to the design and ramp-up of an RMS have not been well addressed. This paper presents a virtual production line-based (VPL) approach to the design and operation of a reconfigurable manufacturing system. Shop floor attributed finite-capacity automaton and VPL attributed finite-capacity automaton are proposed for modelling the control of an RMS, which leads to ease of control software development. Algorithms for balancing VPLs to maximize the productivity of an RMS are discussed. The results of simulation runs of the proposed methodology and algorithms applied to simplified back-end semiconductor manufacturing are provided.     

虚拟制造环境下成本评估技术

介绍了通过历史成本数据矩阵,寻求最小成本路径,估算最小成本和确定最优工艺路径的方法,为虚拟制造和产品设计提供了有效的决策工具。