基于对象的分布式设计问题建模

分布式设计技术是当前CAD技术的一个重要研究方向。为了实现分布式设计过程中信息的有效共享和协作,论文建立了支持分布式产品设计的协同工作环境,给出的系统体系模型为包含中间件的多层体系结构,可为多学科与多目标设计问题集成专用数模,目的是提供快速构造集成化产品设计模型、提高产品设计质量和缩短产品研制周期。论文对基于对象的分布式设计问题建模方法与应用进行了研究。     

三维实体设计与并行工程

三维实体设计技术为企业实现基于并行工程的产品设计和改型提供了强有力的技术支持。笔者介绍了并行工程的概念,以及基于并行工程的产品设计方法的特点,分析了传统产品设计与并行设计流程的差别。在此基础上,指出了三维实体设计对实现并行、一体化设计和集成化协同工作的支持,并用实例说明了这种方法在汽车覆盖件模具设计开发中的应用。     

基于并行工程哲理的CMM检测规划系统的研究与实现

计算机辅助检测规划是现代先进制造技术中不可缺少的重要构成部分，随着并行工程原理和协同求解技术的发展和广泛应用。开展并行工程环境下分布式协同求解技术在检测规划中的理论和应用研究是建立智能化、集成化、自动化先进制造系统的技术基础之一。本文针对检测规划的特点，提出基于三个层次结构的基本模型，形成了并行工程环境下计算机辅助检测规划的完整解决方案。     

计算机支持的工程设计和工业设计的协同工作

随着信息技术的快速发展，设计自动化越来越为工业界所接受。与此同时，产品设计正日益朝着更强功能和更加和谐的人机关系方向发展。如何对上述多元关系进行协调，使产品设计建立在完整的信息模型基础之上，并在计算机支持下进行协同设计，成为产品设计的一个新焦点。本文分析并讨论了工程设计和工业设计两种方法在产品设计中的作用及其协同的可能性，并进一步探讨信息技术环境下产品设计新体系，最后给出了计算机支持的产品协同设计过程。     

基于事件驱动的协同设计系统研究

设计活动的本质是一个事件驱动的过程。基于此，笔者给出了一个分布式环境下，基于Agent的事件驱动的协同设计系统的体系结构模型。定义了协同设计过程中事件的基本概念，给出了事件结构化的描述信息和设计实例，并对协同设计过程中事件的捕获、广播以及同步等过程进行了论述。该系统的研究对建立在异构环境下新型的协同设计系统具有重要的实际应用价值。     

面向网络化协同设计的合作对象管理研究

针对敏捷制造及其模式,提出一个以协同设计思想为指导的产品协同设计环境,用于支持分布式异地协同设计,协调设计过程中各设计人员之间交换、共享产品设计信息和知识的过程.在此基础上,从CSCW支撑平台的角度分析角色-权限管理功能,进而提出应用系统所需要的角色定义及其合作伙伴管理功能.通过对应用工具集成、协同过程控制、通信与信息共享、产品数据管理等功能的实现达到信息集成、过程集成和组织集成的目的,从而提高产品设计过程及其设计决策的效率和质量.     

产品异地协同设计模型的研究与实现

分析了以活动为中心的模型在描述产品协同设计时的不足，根据异地产品协同设计的模式和关键问题，提出针对产品异地协同设计的模型。首先定义了协同活动中的对象，并详细描述对象的属性和特征，给出了协同活动的类图，以表示协同活动中对象间的相互关系。最后，该模型在面向快速成型产品设计的集成协同环境(ICE)中得到了应用和验证。     

基于并行工程的模具设计过程研究

并行工程是对产品设计及其相关过程(包括制造过程及其支持过程)进行并行、一体化设计的一种系统化的工作模式,对基于并行工程的模具设计过程进行研究。     

基于图文多模态融合推理的产品创新方案设计方法研究

目的 针对当前产品创新设计领域中对基于图像-文本多模态知识支撑创新设计方法研究不足的问题,提出了一套基于图文多模态的产品创新方案设计方法。方法 首先,对设计师的设计草图与文本要求进行预处理,然后引入产品设计知识图谱来促进设计思维的发散和创新;其次,通过微调的生成式预训练变换器模型和扩散模型生成产品方案及其概念图;最后,利用深度多模态设计评估模型对产品设计方案的可行性和市场潜力进行评估。结果 通过产品设计知识图谱,及深度多模态设计评估模型的引入,该设计流程可以生成富有创新性且具备可行性的产品方案。结论 基于图文多模态的产品创新方案设计流程结合了最新的深度学习技术,不仅提高了设计的效率,还为设计师提供了更广阔的创新视角和灵感来源。     

分布式协同设计中项目管理系统研究

基于目前项目管理系统存在的主要问题,本文从产品设计的项目分解、过程建模、任务执行引擎以及项目执行监控四个方面着手,对分布式协同设计中的项目管理系统进行了深入研究,并构建了以项目管理为核心的体系结构.     

A distributed multi-agent environment for product design and manufacturing planning

This paper describes a multi-agent approach to the integration of product design, manufacturability analysis, and process planning in a distributed manner. The objective is to develop a distributed concurrent engineering system to allow geographically dispersed entities to work cooperatively towards overall system goals. In the paper, an agent-based concurrent engineering system concerning product design and manufacturing planning, and its fundamental framework and functions are presented. The proposed model considers constraints and requirements from the different product development cycles in the early development phases and fully supports the concept of design-for-manufacturability. This methodology uses conflict resolution (CR) techniques and design-improvement suggestions to refine the initial product design. The model comprises a facilitator agent, a console agent and six service agents. Each service agent is used to model different product development phases, and the console agent acts as an interacting interface between designers and the system, while the facilitator is responsible for the decomposition and dispatch of tasks, and resolving conflicts of poor designs. A prototype system for part design, manufacturability analysis, and process planning has been implemented. The performance of the prototype system shows that it could be extended to include other service agents, such as assemblability analysis, to become a comprehensive distributed concurrent engineering system for geographically dispersed customers and suppliers.     

产品模型和设计过程的演化和融合

从设计历史、设计方法和设计约束三方面分析了产品模型和设计过程的融合与演化。不同设计阶段之间的模型转化和信息继承是设计历史与过程演进的本质。不同的产品信息表示适合于不同的设计方法处理；不同的设计方法决定了不同的设计过程演变。并以油泵产品设计为例，辅证了上述三方面的理论分析。     

并行工程环境下成形铸件制造工艺CAD／CAE系统

并行工程在发展中提出了合理产品设计／工艺设计新概念，在此基础上我们研究开发了一个以传热，热流及应力模拟为核心的铸件制造工艺ＣＡＤ／ＣＡＥ集成系统，系统既可独立运行，又可与并行环境下的产品集成起来，达到同时优化产品设计及工艺设计的目的。目前该系统在多家工厂得到应用，并逐步商品化。     

Topological properties that model feature-based representation conversions within concurrent engineering

One of the fundamental axioms of concurrent engineering is that undertaking functional design without foreseeing the manufacturing process leads to production delays and increased costs. This widely accepted concurrent engineering principle is given a formal basis by development of a mathematical model for the conversion of a feature-based design representation to a manufacturing representation. Within the domain of thin-walled components, it is shown that the conversion to tooling cost representations can result in a discontinuous function when the sets of design and manufacturing representations have been formulated as topological spaces. This discontinuity formally reflects the folklore that a small design change can significantly increase product cost. The mathematical sophistication required within this model is suggestive of why manufacturability evaluations can be quite difficult.     

基于网络的产品设计系统

在分析了企业产品设计的现实需求的基础上 ,指出基于网络的产品设计系统是敏捷制造企业联盟的重要组成部分 ,是企业开展创新产品设计、降低成本、实施并行工程的现代产品设计手段 .并对基于互联网和统一产品数据模型的产品设计系统进行了可行性分析、系统结构分析以及系统实现关键技术分析 .     

Management of Concurrent Engineering: Organizational Concepts and a Framework of Analysis

ABSTRACT

This article examines the concept of concurrent engineering and presents a framework for evaluating its management. The key organizational concepts for managing new product development are first analyzed from a historical perspective. The concurrent engineering approach to new product development is then contrasted with both the traditional sequential and the more recent overlapping problem-solving approaches. Finally, a model for managing current engineering is presented. The model consists of five critical components that may be used by engineering managers for guiding the implementation of their concurrent engineering efforts.     

并行环境下面向装配设计的集成化建模技术

在分析了DFA的主要内容的基础上 ,为了对设计者提供一个友善的集成化DFA分析环境和工具 ,提出了一种适合于对产品可装配性进行分析和评价的集成化的产品信息模型 .该模型能完整地储存产品的装配信息 ,有效地为面向装配设计的各个活动提供集成化的信息支持     

Simultaneous tolerance synthesis for manufacturing and quality

Tolerance allocation affects product design, manufacturing, and quality. No existing technique has been found by the authors that takes product design, manufacturing, and quality into account simultaneously. This paper introduces a new concurrent engineering method for tolerance allocation. A nonlinear optimization model was constructed to implement the method. The model minimizes the combination of quality loss and manufacturing cost simultaneously in a single objective function by setting both process tolerances and design tolerances simultaneously. The purpose of the model is to balance manufacturing cost and quality loss to achieve near-optimal design and process tolerances simultaneously for minimum combined manufacturing cost and quality loss over the life of the product. Compared to other models, this model shows significant improvements. Electronic Publication     

Concurrent multifunction deployment (CMFD)

Quality Function Deployment (QFD) is a powerful tool for quality planning in product design. In the course of time, the QFD method has passed over several improvements and adaptations to meet specific requests of particular working environments. The current needs and challenges in developing radical innovative and life-cycle optimised products require a concurrent approach of product planning against a complex set of objective functions (e.g. quality, cost, assembly, manufacturing, environment, technology, service, disposal, etc.). An advanced form of QFD that integrates concepts of concurrent engineering for planning product development with respect to multi-objective functions is presented in this paper. This framework is called Concurrent Multifunction Deployment (CMFD). TRIZ method was initially exploited to determine the appropriate vectors of intervention in formulating the CMFD methodology. A systematic algorithm supports the CMFD deployment process. It takes into account results from the analysis, innovation and evaluation phases over the product design process, too, ensuring a superior integration of the planning activities within the product development process.