第二部分是对虚拟产品设计技术的概述。
The second part summarizes virtual production design technique.
提出了协同环境下虚拟产品设计系统的体系结构。
System structure of virtual product design in collaborative environment is put forward.
介绍了并联机床虚拟产品设计系统（P MT V PDS）的基本框架及其子系统功能。
The basic framework of Virtual Product Design System for Parallel Machine Tools (PMT VPDS) and functions of three subsystems are introduced. The archetypal system is developed.
利用计算机支持的协同工作（CSCW）技术，开发一个面向虚拟产品设计的专家协同评审系统；
The importance of developing an evaluation system collaborated by experts for virtual product design using CSCW technology is discussed.
虚拟产品设计的关键技术是如何从现实中提取产品知识信息的模型，对知识进行分类和表达，有效地建立知识信息库和知识模型。
The key technique of virtual product development is how to obtain knowledge models from reality, to knowledge classification, express, to build knowledge base and knowledge models effectively.
虚拟样机技术是一种基于集成化产品和过程开发策略的新型的产品设计、开发和评估手段。
Virtual prototyping is a new kind of technology in product design, development, and assessment, which is based on integrated products and process development.
铁路机车车辆虚拟样机系统为产品设计和生产过程的优化提供了集成的建模和仿真环境。
The virtual prototype system of railway locomotives and vehicles provides a modeling and simulation environment for optimization of product design and production process.
针对陶瓷产品设计和制造过程的特点，提出了陶瓷产品虚拟模型的概念。
Aiming at the characteristic of designing and manufacturing of ceramic products, the conception of virtual ceramic product model is defined.
虚拟制造与真实制造相比，几乎无须使用任何的资源和能量，因为它仅仅是产品设计、开发和制造在计算机中的虚拟再现而已。
VM don't use any resources and energies compared to real manufacturing because it is just a virtual realization of product designing, developing and manufacturing in computer.
介绍了虚拟现实技术在汽车产品设计、汽车制造及其试验中的应用，并阐述了其发展前景。
This paper introduces Virtual Reality in the ap-plication of production design, automobile manufacture and test, also expounds development prospect in the automobile.
传统的产品设计方法在虚拟企业环境中已不能完全适用。
Traditional product design methodology is not suitable for virtual enterprise environment.
产品可以不通过实际生产直接虚拟再现，这样设计师就能在产品的设计初期完善产品设计思路。
The products can not be through producing, it can be through virtual reproducing directly, in this way the designer can perfect the products in the infancy of the products.
提出了虚拟企业产品设计过程融合的思想，以及面向虚拟企业的设计过程融合与设计活动集成体系结构。
The concept of process fusion of product design in a virtual enterprise and architecture of virtual enterprise oriented process fusion and activity integration were put forward.
虚拟产品以其在设计上的方便性、对市场需求响应的快速性成为现代产品设计技术研究的一个热门课题。
Virtual production becomes a popular topic in study of modem design technique because its convenient characteristic in design and its quick response to market demand.
虚拟装配是虚拟制造的关键技术之一，可在产品设计阶段进行预装配，验证装配工艺的正确性。
Virtual assembly is the key technology of virtual manufacture, virtual products can be pre-assembled at design stage of products, and the correctness of assembly process plans can be verified.
定量化的评价虚拟设计周期一直是困扰产品设计者的难题。
Quantitative evaluation of the virtual design cycle has been plagued product designers.
在此基础上提出了虚拟环境下生命周期产品设计方案模糊多目标决策方法和数学模型。
Then the fuzzy multi-objective decision methods and mathematics model of product project based on virtual design simulation for product life-cycle were expounded.
通过虚拟样机技术，工程师可以运用机械系统仿真试验，在设计阶段发现产品设计中的潜在问题，并快速进行修改，减少了对于物理样机的依赖。
By simulation tests, engineer can not only discover the potential problems of design and modify it in time, but also decrease the dependence on physical model.
在产品开发过程中应用虚拟样机技术，可以优化产品设计方案，缩短产品开发周期，节约产品开发成本，从而使企业在竞争中获得极大的优势。
During the research, virtual prototyping can be applied to optimize the project of design, shorten time and reduce design cost, as a result company can get the run upon the competition.
介绍基于虚拟样机技术的现代产品设计流程，分析虚拟装配技术在产品设计中的作用。
The modern production design process based on the virtual prototyping was introduced here, and the action of the virtual assembly in the design was analyzed.
人性化产品设计中引入虚拟现实技术是未来产品设计的趋势之一。
It is one of the trends of product design in the future to introduce virtual reality technology in the humanized product design.
虚拟样机技术是一种新型的基于集成化产品和过程开发策略的新的产品设计、开和评估手段。
Virtual prototyping is a new kind of technology in products design, development, and assessment, which is based on Integrated products and Process development.
虚拟装配是虚拟制造的关键技术之一，它能有效支持自顶向下的并行产品设计以及与主模型相关的可制造性设计和可装配性设计，以缩短产品开发的周期。
As well as the manufacturing possibility design and assembling possibility design correlated with the master model, which will greatly reduce the products research and development period.
虚拟装配是虚拟制造的关键技术之一，它能有效支持自顶向下的并行产品设计以及与主模型相关的可制造性设计和可装配性设计，以缩短产品开发的周期。
As well as the manufacturing possibility design and assembling possibility design correlated with the master model, which will greatly reduce the products research and development period.
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