基于网格的产品异地协同设计平台

为了更好的共享企业设计资源,提高产品的设计效率,提出了基于网格的协同设计平台(GCD)的概念.通过开放网格服务框架(OGSA),建立了GCD的体系结构.分析了GCD的协同模型以及支持纵横向协同的产品设计模式,并采用XML技术文档对网格资源进行描述,利用GT4.0实现GCD中的服务,并基于Web开发了GCD的相关门户实例.该技术能为分布在异地的设计人员提供高级的网格服务,从而最大程度地实现资源共享和协同工作,为产品异地协同设计的实施提供了新的解决思路和方法.     

网络环境下基于立体鼠标和数据库的虚拟装配

将数据库技术、基于Web的虚拟现实技术和CAD技术相结合,为三维产品信息的异地协同管理提出了一种支持平台.构建了实时交互的基于Access数据库的虚拟模型库系统,在有限的网络带宽下实现了活塞气泵和齿轮泵的虚拟装配.在Web环境下直接接入Spaceball 5000立体鼠标,通过更自然直观的人机交互方式,提高异地协同设计的效率.     

三维模型多量级协同方法研究

为提高Internet环境下基于三维模型的协同产品开发效率,提出了一种多量级协同方法.首先将三维模型转换成两种量级的轻量化模型,然后根据不同协同操作向协同者提供相应的轻量化模型.通过企业实际应用,证明该方法能显著提高基于三维模型的协同产品开发效率.     

民用雷达结构工艺一体化平台构建及其关键集成技术研究倡

文中构建了民用雷达结构工艺一体化研发平台框架,研究了基于模型状态的结构工艺协同机制、基于工艺物料清单(Process Bill of Material, PBOM)的装配工艺模型重构、基于轻量化技术的模型数据传递以及基于Web技术的三维工艺发布等关键支撑技术,解决了民用雷达研制过程中存在的不同专业研发过程不协同、信息不关联、传递不顺畅、管控不精细的问题,实现了三维数字样机在设计工艺制造过程中的传递与应用。该平台的建立与应用推动了以三维数字样机为特征的民用雷达并行协同研制模式的形成。     

面向敏捷制造车间模式的分布式协同作业方法与实施技术

根据实施敏捷制造车间生产管理信息系统的要求,分析了制造车间的现状和特点,提出用Multi-Agent方法分析和设计车间管理单元,采用Web技术进行信息共享和支持协同决策过程.论述了分布式环境下车间协同作业的组织结构、系统架构、协同方法和协同工具等关键技术,用J2EE标准建立了一种可伸缩的分布式协同核心业务平台,为建立基于敏捷制造车间模式的生产信息管理系统提供了一种应用技术.     

协同设计过程中产品模型协同批注的研究

面向分布式异构环境下的协同设计,分析协同设计过程中产品模型的协同批注流程,提出一套基于Web的产品模型异步协同批注解决方案,建立了异步协同批注系统的功能模型,并对该系统进行具体实现.通过共享模型技术,解决由不同三维设计建模系统所引起的批注过程中的异构问题,为分布式异构环境下协同设计的实现提供保障.     

基于Web的齿轮设计系统研究与开发

齿轮是一种通用的机械传动零件.采用ASP.NET技术和网络数据库技术,使用C#语言开发了基于Web的齿轮设计系统.该系统利用Auto CAD的二次开发技术,实现了从强度计算到三维实体模型的自动生成的全过程,为基于网络的协同设计提供了一种通用零件的设计手段.     

基于Web的同步协同CAD/CAM系统的数据交换机制

基于Web的协同CAD/CAM技术是网络环境下数字化设计与制造的一个重要研究方向。本文结合同步协同CAD/CAM原型系统C SupermanCAD/CAM的开发 ,提出了一种在同步协同CAD/CAM系统中进行操作命令、三维几何数据和多媒体数据交换的解决方案 ,为面向 2 1世纪的新一代制造技术的实现提供了可靠的保证。     

基于Web的异构CAD协同批注系统的设计与实现

随着协同工作的广泛深入,协同浏览与批注技术作为协同技术的重要组成部分,对产品设计平台异构性支持的需求也越来越迫切.对"基于Web的支持异构CAD数据的浏览与批注技术"和"基于Web的协同技术"等进行了初步研究,并在此基础上开发了一套基于Web的支持异构CAD数据的协同浏览与批注原型系统.研究结果表明,该系统可以实现异构CAD数据基于Web的协同浏览与批注,加快了产品设计进程,提高了设计效率.     

基于Web3D的机械CAD课程设计

随着CAD技术的飞速发展,三维可视化设计、异地协同设计等新方法、新概念不断涌现,并成为主流。传统的基于二维空间的机械CAD课程设计模式显然不符合企业的需求。为此,将Web3D技术引入到机械CAD课程设计中来,以V带传动设计为例,以Apache＋PHP＋MySQL＋VRML为系统搭建模式,讨论了基于Web的三维可视化CAD系统开发过程,为机械CAD课程的革新积累经验、提供支持。     

共享三维变换矩阵的模具工艺协同关键技术研究

分析了网络环境下模具协同工艺设计的关键技术,对比研究了三种工艺协同浏览方案及其开发技术,提出了共享三维变换矩阵的模具工艺协同浏览解决方案,讨论了共享变换矩阵的协同浏览原理,对模具网络协同工艺会商系统中异构CAD数据的轻量化中性交换模型选择、调用及控制方法进行了研究。设计了基于新方案的模具工艺协同设计系统功能框图,采用Java 3D技术开发了模具工艺协同原型实验系统。对三维变换矩阵、工艺白板、工艺命令流等封装、组播和提取过程进行了详细描述。该技术为多工艺专家协同完成大型复杂零部件成形模具工艺设计提供了技术支撑。     

Modular architecture model of CSCD system

A modular architecture model of a computer-supported collaborative design (CSCD) system is proposed on the basis of the hierarchical structure characteristics of a distributed collaborative design system and advanced component object technology. The model mainly regards the module as the core organizing and managing design objects and uses the common object request broker architecture (CORBA) specifications as an interactive platform to achieve object communication. The browser/server computing model deals with the remote heterogeneous collaborative design problem. Product design strategies and mechanisms for collaborative design are separated to facilitate the application of distributed collaborative design environment for quick implementation. The open design framework for CSCD system developers can support the implementation of distributed collaborative design to improve product design speed and reduce product development time. The modular CSCD system (MCSCDS) model and its implementation are achieved in the modular CSCD, a prototype system.     

支持协同的3维轻量化模型与圈阅工具的研究

为提高3维模型的传输效率和协同设计中的数据保密性，定义了一种支持协同的3维轻量化数据结构，引入了轻量化装配模型和轻量化零件模型，其中轻量化装配模型记录了模型的产品结构关系和各零件的装配位置，轻量化零件模型记录了模型的非精确显示数据和支持模型测量的精确几何数据及其关联。因为过滤原始3维模型中的非几何信息，轻量化模型的数据量约为原始模型的1／20。在系统实现方面，给出了3维轻量化工具的体系结构，研究了3维模型轻量化组件、可视化浏览器组件和可视化协同组件的开发。最后，在某汽车制造企业的产品数据管理系统中进行了实施，提高了3维环境下的协同设计效率。     

An Internet-based integrated product design environment. Part I: a hybrid agent and network architecture

During the past two decades, concurrent or collaborative engineering (CE) has presented new possibilities for successful product development. In addition, the advances in computer networks and information technology have brought engineering design context into a new era. As a promising approach to accommodate the radical pace of changes in the context of engineering design, agent technologies have been attracting public attention and are being used in an increasingly wide variety of applications. However, little attention has been paid to multi-agent system (MAS) frameworks for CE environments that enable systematic and timely design integrations in both hierarchical and heterarchical design topology. This is the first of a two-part paper proposing a MAS framework for integrated product design in a computer network-oriented CE environment. Part I first proposes a hybrid agent network architecture to develop lightweight, dynamic and large-scale distributed systems, and then proposes a hybrid agent architecture based on our finite state automata (FSA) formalism that can exhibit both hybrid behaviours and hybrid interactions. Finally, some ideas for building an integrated product design environment are presented using the proposed agent and network architecture. Part II discusses the applications of the proposed MAS framework to concurrent engineering design.     

虚拟样机多学科协同设计与仿真平台实现技术

在分析产品协同开发平台的功能框架以及主要协同模式的基础上，深入研究了虚拟样机多学科协同设计与仿真平台的分布式计算模型，及其协同运行管理、协同产品开发资源库管理、分布数据的协同交互管理与系统实现技术。基于COM／DCOM的建模与仿真工具协同、支持仿真联邦管理的数据库设计和CORBA的应用实现技术，开发了原型系统。该系统支持Internet网络环境下各种建模与仿真工具跨平台、分布交互与异构集成，可有效支持复杂产品虚拟样机的协同开发。     

A task-oriented modular and agent-based collaborative design mechanism for distributed product development

The rapid expansion of enterprises makes product collaborative design （PCD） a critical issue under the distributed heterogeneous environment, but as the collaborative task of large-scale network becomes more complicated, neither unified task decomposition and allocation methodology nor Agent-based network management platform can satisfy the increasing demands. In this paper, to meet requirements of PCD for distributed product development, a collaborative design mechanism based on the thought of modularity and the Agent technology is presented. First, the top-down 4-tier process model based on task-oriented modular and Agent is constructed for PCD after analyzing the mapping relationships between requirements and functions in the collaborative design. Second, on basis of sub-task decomposition for PCD based on a mixed method, the mathematic model of task-oriented modular based on multi-objective optimization is established to maximize the module cohesion degree and minimize the module coupling degree, while considering the module executable degree as a restriction. The mathematic model is optimized and simulated by the modified PSO, and the decomposed modules are obtained. Finally, the Agent structure model for collaborative design is put forward, and the optimism matching Agents are selected by using similarity algorithm to implement different task-modules by the integrated reasoning and decision-making mechanism with the behavioral model of collaborative design Agents. With the results of experimental studies for automobile collaborative design, the feasibility and efficiency of this methodology of task-oriented modular and Agent-based collaborative design in the distributed heterogeneous environment are verified. On this basis, an integrative automobile collaborative R＆D platform is developed. This research provides an effective platform for automobile manufacturing enterprises to achieve PCD, and helps to promote product numeralization collaborative R＆D and management development.     

Live parametric design modifications in CAD-linked virtual environment

This paper presents a solution to support parametric design modification in a virtual reality (VR) environment. It builds upon a novel computer-aided design (CAD) and VR integration framework, namely, CAD-linked virtual reality environment. With this framework, semantic information in CAD models, such as constraints, design features, and parametric settings can be automatically extracted during the creation of VR environment and be integrated into the virtual assembly (VA) models. Moreover, the persistent naming mechanism originating from feature-based modeling technology is introduced into the CAD–VR integration, based on which a persistent linkage between VA models and their CAD counterparts can be established. Users are able to visualize design features and to access the associated parametric info in VR environment and also to change the parametric settings online whenever necessary. The modified parametric settings are then sent back to the linked CAD models so that parts can be re-evaluated. The modified CAD part can then be reloaded into the VA model under an automated mechanism. Such communications between CAD and VR applications are supported in a live mode utilizing the COM interfaces provided by CAD server. With this solution, a quick return loop from VR to CAD is achieved. Therefore, it provides the possibility to support quick design change review and “what-if” evaluations for applications such as collaborative system design and immersive project review in VR. This constitutes the major contribution of the work to product development process.     

COLLABORATIVE DESIGN OF MULTIPHYSICS PROBLEMS

Collaborative design is recommended to solve multiphysics problems (MPPS). Firstly, mathematical model of MPPS is constructed and solved by a proposed partitioned method, analysis of which suggests that collaborative design be feasible to solve MPPS. As the key technology of col-laborative design of MPPS, a task collaboration algorithm is then proposed. To develop the applica-tion framework of collaborative design, applied unified process(AUP) is proposed based on rational unified process(RUP). Then AUP is used to develop the collaborative design platform, whose function framework is constructed according to the process of project management. Finally three MPPS are solved on this platform and the results suggest that the proposed model, algorithm and framework be feasible.     

军用电子产品数字化协同设计平台研究与应用

针对复杂军事电子产品研制过程中存在的物料清单（Bill of Material, BOM）准确率低、多专业协同难度大、技术状态变更频繁等问题,采用基于模型定义（Model Based Definition, MBD）技术建立全三维、一体化协同研制环境,围绕多专业在线协同设计、一体化BOM管理、三维工艺可视化、企业级基础资源库等关键技术开展研究,配合MBD标准规范、业务流程优化等保障措施,有力支撑新研型号产品全三维一体化研制模式落地,为企业研制模式数字化转型提供有益参考。