协同设计工作流管理系统的JavaMail通信技术

随着CIMS工程的不断发展和推广,协同设计和工作流技术的联系越来越紧密,在协同设计中采用工作流管理技术,可以减少业务过程中间环节的人为因素,提高活动之间的协调和控制的效率,从而达到企业协同设计过程效率的最大化,而工作流管理系统必须建立在适当的通信基础之上来实现项目参与者之间的通信;在分析异地协同设计工作流过程模型和通信协议的基础上．根据异地协同设计的特点．利用java Mail实现异地协同设计中工作流管理系统的通信,展现了用Java Mail解决此类问题的便捷性。     

异地产品协同设计系统的构建方法研究

提出基于屏幕共享与远程控制技术的总线型产品协同设计系统的构造方法，并利用此方法构建产品异地协同设计系统(PCDS)．该方法能大大降低系统实施的成本，重用企业已有的软件资源．介绍了系统构建的方法、体系结构框架与关键技术．     

建立动态群组的多Agent协同模型及应用

提出一个建立动态群组的Agent协同模型及在异地同步协同中的应用.重点分析协同模型的功能组成、建立动态群组的算法过程和在异地同步协同中的应用,其中协同agent通过协同用户列表控制群组中的动态用户.建立该模型的目的在于提高协同Agent适应环境变化的能力.     

分布异地HLA对象模型协同建立技术的研究

本文主要围绕分布异地HLA对象模型的协同建立技术中的协同环境框架、协同协议以及分布式版本控制等问题展形讨论。首先提出了整个分布异地HLA对象模型建立的协同环境框架设计，接着重点分析了需要解决的关键技术，包括协同协议和版本控制技术的研究。     

协同产品开发集成环境的研究与实现

首先讨论了协同产品过程的特点,分析了能够支持协同产品开发的关键技术。文中建立了协同产品开发集成环境的体系结构,该体系结构能够满足产品开发人员在各个层次上的协同需要。在此基础上提出了协同产品开发集成环境的具体结构,它建立在Ｌｏｔｕｓ　Ｎｏｔｅｓ和Ｐｒｏ／Ｉｎｔｒａｌｉｎｋ的基础上,能够为产品开发人员提供一个高效的协同工作环境。     

冲压产品异地协同设计/制造系统

运用IDEF0过程建模方法构建冲压产品异地协同设计／制造系统过程模型,着重论述了协同工作中知识获取、基于广义框架／规则模式的知识表示、基于应用单元概念的知识引用和基于层次的CSCW工具集成等关键技术．在此基础上,提出了系统的层次体系结构,从而形成比较完善的冲压产品协同设计／制造环境．系统充分体现了IDEF0结构分析方法、CSCW方法学、知识工程和CAx的有机结合．通过实际应用,该系统能有效地提高相关企业的冲压产品协同设计／制造能力．     

协同虚拟样机的工作流时间管理研究

协同虚拟样机的工作流管理能支持和控制分布异地的多个集成化产品开发团队的动态协同设计过程,实现对虚拟样机协同设计过程的有效管理,对改善虚拟样机工作效率、提高工作质量起着重要的作用。重点对虚拟样机的工作流时间管理进行了研究,通过对路由结构的分析,采取工作流松弛时间分配方法,调整部分弱不满足时间约束至可满足状态,使更多的工作流实例满足截止期限,降低了异常触发频率,节省了处理开销,提高了运行效率。     

网格环境下基于模拟的协同设计与制造

基于模拟的虚拟产品开发涉及到建模和模拟技术，模拟主要是设计评估和验证，确保设计的性能，验证设计的缺陷。本文介绍了一种网格环境下的协同设计与制造技术，分析了松耦合的协同设计与制造，结合网格的最新研究进展，设计基于模拟的虚拟产品开发，更有效地利用各种有效的资源，缩短产品开发周期，实现网格环境下协同设计与制造。本文主要集中在基于模拟设计的协作网格环境开发的分析与设计。     

异地寻址和协同同步技术研究

针对制造业异地设计的特殊需求，在分析了NetMeeting作为异地设计支撑工具的局限性，提出了基于NetMeeting的COM组件技术的ICE系统，主要讨论ICE通过ICE Server和传输控制消息的方法解决异地寻址和协同同步两大问题及优化会议管理等关键技术。     

基于对象技术的协同设计研究

协同产品开发是提高企业竞争力的重要手段。本文探讨了协同工作模式与建模的需求,提出了一种基于对象的协同产品开发模式,包括产品信息共享、过程的集成和对象封装技术支持分阶段的协同优化决策。以注塑模具制造为背景,在并行工程框架环境下,阐明了这一协同产品开发的具体实现。     

A CAE-integrated distributed collaborative design system for finite element analysis of complex product based on SOOA

Large-scale finite element analysis of complex product needs a wider support from external CAE resources. This paper proposes a method of the distributed concurrent and collaborative design in the distributed intelligent resources environment to use Web-based extended manufacturing resources for product development. The CAE-integrated distributed collaborative design system architecture and enabling techniques are presented. Distributed CAE service resources on the Internet are achieved through Jini^TM and service object-oriented architecture technologies. These CAE software tool resources are encapsulated as service providers in the system. A case study of railway bogie development is presented, and the Pro/E, HyperMesh, Ansys and HumanExpert service providers dynamically invoked and integrated as a temporary service federated environment with no need to know the exact location of a provider beforehand, flexibility can be well achieved, and collaborative design in the system can be implemented in the distributed dynamic environment. Compared with the traditional design system, some preliminary results indicate this architecture can shorten the cycle of service exchange, and strongly support concurrent and collaborative design of the complex product.     

A QFD-based method to support SMEs in benchmarking co-design tools

Efficient collaborative product design is crucial for extended enterprises willing to develop complex products pursuing a short time to market. However, successful collaborative product design depends on the ability to effectively manage and share engineering knowledge and data throughout the entire product development process. Co-design software platforms aim to facilitate cooperation in distributed teams. In the context of Small and Medium Enterprises (SMEs) the advanced co-design software implementation to support the supply chain is not a trivial task. SMEs have peculiar characteristics such as flexibility, ICT skills and financial resources, which are difficult to be integrated within a structured design network. This paper presents a method to define and evaluate a co-design platform dedicated to SMEs in the mechanical product field. System architecture is defined by applying suitable metrics based on collaborative process characteristics in order to assess functionality performance of the available tools. Benchmarking is based on different levels of collaboration recognized in the typical product development process in SMEs. Correlation between process metrics, software functionalities and specific collaboration requirements is managed by adopting Quality Function Deployment (QFD) techniques. A practical case study allows the robustness of the proposed method to be verified and the main advantages and future developments to be discussed.     

Hybrid client-server architecture and control techniques for collaborative product development using haptic interfaces

In this paper, a collaborative product development and prototyping framework is proposed by using distributed haptic interfaces along with deformable objects modeling. Collaborative Virtual Environment (CVE) is a promising technique for industrial product development and virtual prototyping. Network control problems such as network traffic and network delay in communication have greatly limited collaborative virtual environment applications. The problems become more difficult when high-update-rate haptic interfaces and computation intensive deformable objects modeling are integrated into CVEs for intuitive manipulation and enhanced realism. A hybrid network architecture is proposed to balance the computational burden of haptic rendering and deformable object simulation. Adaptive artificial time compensation is used to reduce the time discrepancy between the server and the client. Interpolation and extrapolation approaches are used to synchronize graphic and haptic data transmitted over the network. The proposed techniques can be used for collaborative product development, virtual assembly, remote product simulation and other collaborative virtual environments where both haptic interfaces and deformable object models are involved.     

e-CAPP: A distributed collaborative system for internet-based process planning

Advances in distributed technologies have enabled engineers to communicate more effectively, collaborate, obtain, and exchange a wide range of design resources during product development. Shared internet-based virtual environments allow experts in remote locations to analyze a virtual prototype, together and simultaneously in centers in which the product is being developed.This paper presents a system for distributed and collaborative environment which could assist manufacturing enterprises and experts in discussing, suggesting, evaluating and selecting best process plans for family of manufacturing parts. The represented e-CAPP system enables the implementation of expert knowledge in an appropriate knowledge repository. The knowledge from this repository is integrated into intra-company CAPP systems and used while generating process plans for new products. The proposed internet-based collaborative environment, dedicated to distributed process planning, is yet another step in the direction advancing of distributed manufacturing.     

基于HLA的多领域协同仿真模型集成研究

研究复杂产品协同仿真开发过程中的仿真模型集成问题。联合使用松散耦合与紧密耦合技术,设计一种缓冲池实现机制。以高层体系结构为软总线,利用分布式数据库、文件模拟数据库和XML技术,统一不同领域软件的仿真模型定义规范。转化后的模型数据在协同仿真的软件间交互,数据库与文件存储在协同仿真过程中起到缓冲作用。采用面向服务架构的方式构建子模块,将各领域仿真软件松散耦合到虚拟样机协同仿真平台中。以热控电动百叶窗机构机电联合仿真为例,分别进行集中式仿真和协同仿真分析。结果表明,该方法能提高协同仿真的速度与精度。     

Collaboration planning framework (CPF) to support distributed product development

Current marketplace is undergoing major changes that will affect the way organizations conduct their business. Organizations need to respond to a geographically dispersed marketplace. This can be achieved by leveraging globally distributed resources to fully understand and interpret individual customer needs. That is, organizations need to integrate their operations (product development) in a way that will allow dynamic response to market changes. Computer-supported collaborative engineering could provide the integrating mechanisms needed to integrate distributed operations. The change to collaborative engineering should be based on sound and comprehensive methodologies that can analyze current practices, assess their ability to be performed collaboratively, restructure organizational practices to enhance their performance in a collaborative environment, select appropriate tools to support practices, and provide an implementation plan. This paper presents a framework to build computer-supported collaborative product design and development operating in a distributed environment. The framework is composed of six modules that provide a systematic procedure to plan for computer supported collaborative engineering.     

A collaborative and integrated platform to support distributed manufacturing system using a service-oriented approach based on cloud computing paradigm

Today's manufacturing enterprises struggle to adopt cost-effective manufacturing systems. Overview of the recent manufacturing enterprises shows that successful global manufacturing enterprises have distributed their manufacturing capabilities over the globe. The successes of global manufacturing enterprises depend upon the entire worldwide integration of their product development processes and manufacturing operations that are distributed over the globe. Distributed manufacturing agents' collaboration and manufacturing data integrity play a major role in global manufacturing enterprises' success. There are number of works, conducted to enable the distributed manufacturing agents to collaborate with each other. To achieve the manufacturing data integrity through manufacturing processes, numbers of solutions have been proposed which one of the successful solutions is to use ISO 10303 (STEP) standard. However, adopting this standard one can recognize antonym effects of integration and collaboration approaches that weaken both integration and collaboration capabilities of manufacturing agents. In our latest work, we had developed an integrated and collaborative manufacturing platform named LAYMOD. Albeit the platform in question was through enough to be applied in various collaborative and integrated CAx systems, its embedded structure hampers its application for collaboration in distributed manufacturing systems. To achieve an integrated and collaborative platform for distributed manufacturing agents, this paper proposes a service-oriented approach. This approach is originated from cloud computing paradigm known as one of the technologies which enables a major transformation in manufacturing industry. Also, to maintain the product data integration based on the STEP standard, a new service-oriented approach is proposed. This approach is in parallel to the new capability of the STEP standard for supporting XML data structures. The result is a new platform named XMLAYMOD. XMLAYMOD is able to support distributed manufacturing collaboration and data integration based on the STEP standard. The different aspects of this platform to fulfill the requirements of distributed collaboration and also to overcome the lacks of the STEP standard are discussed through a brief case study.     

An Internet-based intelligent design system for injection moulds

The rapid growth of Internet and information technologies in recent years provides a solution to support and facilitate collaborative product developments among different geographically distributed enterprises. An effective and feasible tool to aid the collaborative development of injection moulds can be realized by developing an Internet-based mould design system as one of the modules of a collaborative product development system. This paper presents a prototype Internet-based intelligent design system for injection moulds. The architecture of the system consists of an interactive KB mould design system embedded in an Internet environment. A Java-enabled solution together with artificial intelligence techniques is employed to develop such a networked interactive CAD system. In this system, the computational module, the knowledge base module and the graphic module for generating mould features are integrated within an interactive CAD-based framework. The knowledge base of the system would be accessed by mould designers through interactive programs so that their own intelligence and experience could also be incorporated with the total mould design. The approach adopted both speeds up the design process and facilitates design standardization which in turn increases the speed of mould manufacture. A practical case study is presented to illustrate the operations of the Internet-based mould design system.     

面向复杂产品协同开发的数据集成方法研究

目前通用数据集成方法无法满足复杂产品协同开发的需求.在分析复杂产品协同开发特点的基础上,提出了一种基于网格与RDF技术的数据集成方法.该方法采用网格技术解决数据源的分布性和异构性,利用RDF技术解决数据源间的语义异构,并通过基于服务质量的数据源选择方法得到符合条件的数据源.最后,用实例验证了该方法的实用性与有效性.