A strategy for integrating product conceptualization and bid preparation

Collaboration with other members of the supply chain is one means by which small and medium sized enterprises (SMEs) can compete in today’s global business environment. Thus, early stages of the new product development process involve both technical activities, e.g., product platform definition, and commercial activities, e.g., bidding for contracts. This paper introduces an integrated collaborative bidding and design system (CBDS) to help SMEs coordinate the two aspects. General sorting was employed for initial requirements acquisition and platform definition; while a self-organizing map (SOM) neural network was combined with a concurrent cost-schedule estimation strategy for refinement of design options and bid evaluation/preparation. A case study on cellular phone design was then applied for illustrating the proposed prototype system.     

Research on integrating customization design for mechanical product

This paper proposes an integrating rapid customization design system which combines various technologies such as Web, knowledge based engineering (KBE), engineering database and Computer Aided Design (CAD) and has been used in elevator design. The whole system is set up on the base of engineering database technology, integrating Product Data Management (PDM), Enterprise Resource Planning (ERP) etc. It adopts Web technology to enable customers to individually customize products remotely through the internet. The system also adopts KBE to manage and reuse product design knowledge, while combining the technology of product family modeling and technologies of feature modeling and parametric design, based on the assembly of the CAD system of Unigraphics Solutions Inc., to create a product family case library that achieves intelligent, rapid design customization. __________ Translated from Journal of Machine Design & Research, 2006, 22(1): 6–8 [译自: 机械设计与研究]     

集成化产品成本估计系统设计

成本估计是产品设计中非常重要的环节,分析了成本估计工作中存在的问题;指出了信息集成是成本估计的亟待解决的关键问题;设计了集成化成本估计的支持系统,该系统将CAD产品结构信息,CAPP中的工艺信息和MRPⅡ中的工作中心信息进行系统集成,通过系统实现提高了成本估计的精度;缩短了成本估计的时间;扩大了成本估计的范围。     

A distributed product development architecture for engineering collaborations across ubiquitous virtual enterprises

In order to use high-fidelity analysis and design tools at the design stage, designers need to communicate with domain experts and their tools, which may be geographically dispersed over heterogeneous computing platforms. However, technical difficulties and ontological issues such as distributed computing, application integration, and distributed product information sharing impede the collaborative product development. This paper presents a distributed product development architecture for engineering collaborations across ubiquitous virtual enterprises. It provides an integrated framework for product development services to effectively communicate to realize true engineering application integration. The focus of this paper is to address three key issues. One is concerned with product information sharing and synchronization across virtual enterprises. Another is concerned with federations of product development services over the collaborative process. The third is related to the engineering context management using semantic web for providing more human-oriented collaborations services. A case study for developing a mobile phone is shown to validate the implementation of the proposed approach, which gives a great deal of possibilities for supporting a rich set of product development scenarios in ubiquitous environments.     

Concurrent design process analysis and optimization for aluminum profile extrusion product development

Owing to intricate interdependency and information feedback among tasks, the concurrent design process probably cannot converge to the correct solution when there are wrong integration and improper interaction between activities. Therefore research on concurrent design process optimization is necessary. In the paper, a novel methodology is proposed to analyze and optimize the concurrent engineering process scientifically. Based on design structure matrix and graph theory, coupled task recognition and design task level plotting are performed for the concurrent design process of aluminum profile extrusion product development. Three factors are used to describe the coupling property of activity, namely sensitivity, complexity and affection factors, which provide the basis to analyze development process quantitatively. And an optimism algorithm is presented to define the initial iteration order of coupled task set. Finally a rational and efficient concurrent design process model is constructed, which can make aluminum profile product development faster, with lower costs and higher quality. The methodology proposed is also applicable to other concurrent engineering fields.     

A design representation scheme for collaborative product development

Design is an integral component of product development, which includes manufacturing. In order to avoid costly reworks and delays, and to reduce the lead-time in product development, effective communication of design concepts among the various stakeholders such as customers, designers and engineers is of utmost importance. In this respect, functional representations provide a methodology, which can be used to describe a design or product effectively. However, function is not the only type of information that needs to be communicated among the various stakeholders during a design process. Other types of information such as design specifications and constraints, which are non-functional, also need to be taken into account. This non-functional information cannot be adequately expressed using existing functional representations. Accordingly, in this work, a novel purpose-behaviour-structure (PBS) representation scheme to capture vital design knowledge for collaborative product development is proposed. The proposed PBS representation scheme can be used by designers working in a collaborative environment for product development. A case study on the design of a vacuum cleaner is used to illustrate the functionality of the PBS representation scheme. The details of the representation scheme are presented in this paper.     

集成供应商选择的产品族设计多目标方法

为避免将产品族设计和供应商选择过程分割而导致不可行或非最优的产品开发方案,以及从多角度对产品族优化设计方案进行评估和权衡,提出一个集成供应商选择的产品族设计多目标优化方法,并建立了一个以最大化产品族总利润和最小化产品族生产风险为多目标的优化模型。在该模型中考虑了产品情感属性对消费者选择行为的影响,以更准确地分析消费者的购买偏好、实现产品族的优化过程。针对优化问题,采用非支配排序遗传算法对模型进行求解。通过实际案例说明了所提优化方法和求解算法的可行性和合理性。     

工业设计在现代企业产品开发中的地位和作用

从工业设计的概念入手,阐述了工业设计对现代社会的重要意义,以及工业设计师在企业产品开发设计中的地位及其所发挥的作用,分析了我国目前工业设计的现状并展示了工业设计的光明前景。     

A case-based reasoning approach to generating new product ideas

This paper presents an approach to facilitate the generation of new product ideas. In this approach, a product is represented by a vector, which involves a number of product attributes. These attributes are defined based on the user-centered design (UCD) paradigm. That is, the context of use and interactions with users for the product is described by these attributes. By the product representation, a product database can be established. For a benchmarking product, we use the case-based reasoning (CBR) technique to retrieve those products, which are “sufficiently relevant” to the benchmarking one, from the database. The functions of the retrieved products are the candidate new ideas to be added on the benchmarking product. These retrieved products are screened manually to identify creative and valuable ideas. A prototype system of this approach has been implemented. Experiments show that the proposed approach outperforms the brainstorming technique, which has been widely used in industry.     

基于Petri网的产品研发设计工作流的柔性建模方法

为了解决复杂产品研发设计工作流建模问题,提高产品研发设计工作流管理系统在运行中对动态变化的响应能力,提出了一种基于Petri网的柔性建模方法.该方法结合面向对象和分层的思想对Petri网进行扩展,利用优先级、变迁触发规则等属性规则描述了模型的柔性.该方法不仅可以降低产品研发设计工作流建模的复杂度,还可以支持产品研发设计...     

并行工程中产品、活动和组织的集成建模

新产品开发系统建模是应用并行工程的基础 ,模型的目的是建立一个环境 ,从而有利于产品开发信息在企业不同部门之间的流动和共享。然而 ,除了信息共享的障碍以外 ,系统如何适应活动和组织的变化 ,也是成功实现开发系统集成和应用并行工程的重要问题。文中将新产品开发系统分为产品层、活动层和组织层 3个层次。通过对各层建模方法及它们之间相互关系的分析 ,提出活动模型、产品模型与产品开发组织模型的集成 ,是并行工程应用模型的关键。并且在活动模型的基础上 ,对活动模型、产品模型和组织模型集成的方法进行了研究。     

面向产品概念设计的设计工具选择与应用

本文分析了产品概念设计的特点与重要性,指出合理的选择设计工具对于提高产品开发的效率与质量至关重要。介绍了面向方案创新的CAI设计软件Pro／Innovator与支持三维建模与设计验证的CAD设计软件Solid Works,并通过一工程实例说明两种设计工具的使用很好的支持了产品概念设计过程。     

机电产品的绿色设计与制造及其发展趋势

绿色设计与绿色制造是一种全新的设计与制造理念,它们是人类社会可持续发展在现代制造业中的体现。从分析实施机电产品绿色设计与绿色制造的意义出发,论述了绿色设计、绿色制造以及绿色机电产品的定义,给出了机电产品绿色设计与绿色制造的实质和内容,并提出了绿色设计的体系结构和机电产品的绿色设计原则,指出了机电产品绿色设计与制造是机电产品机械制造业的发展趋势。从机电产品绿色设计与制造的全球化、社会化、集成化、并行化、智能化、产业化等方面论述了机电产品绿色设计与制造的发展趋势。     

产品服务系统共生设计理论与方法

针对具有多主体、产品与服务共生特征的产品服务系统设计困难问题,首次将共生理念引入产品服务系统设计,突破传统设计理论的单边串行为多边并行设计模式,提出产品服务系统共生设计理论与方法.为保证异质异构产品服务建模的多样性和一体化,基于超网络提出产品服务系统共生建模方法,并建立共生特征和共生吸引模型,以驱动设计要素的跨层转化....     

需求产品设计及其关键技术研究综述

产品设计的创新点在于满足某种市场需求。需求产品设计作为产品设计的第一步，直接影响产品设计质量的优劣。分析了需求产品设计过程中应用的关键技术，比较了国内、外面向需求产品设计的系统特点。最后，给出了一个国外应用实例。     

基于耦合强度设计结构矩阵的复杂产品配置模型优化及应用

针对复杂产品内部结构耦合性强、配置设计求解效率和准确性低的问题,提出基于耦合强度设计结构矩阵的复杂产品配置模型优化技术。定义了产品配置结构体,基于结构体之间的父子逻辑关系和约束关系,对配置模型进行耦合分析,并对结构体间的耦合关系进行量化。通过映射得到配置模型耦合强度设计结构矩阵,对其进行分解变换并给出的聚合强度指数函数进行判定,得到结构体聚合集。采用基于净供给度解耦算法撕裂聚合集,重组配置结构体,优化配置模型。该技术在高档数控机床配置设计中得到了应用与验证,提高了数控机床的配置效率与准确性。     

面向机电产品方案设计的绿色特征建模

针对产品方案设计阶段缺少有效绿色设计理论方法和技术支持的问题,建立了基于绿色特征的机电产品方案设计阶段环境影响信息表达模型。提出了绿色特征的概念,对产品方案设计阶段的各种环境影响信息进行描述。提出基于绿色特征的方案设计阶段信息表达方法。通过绿色特征对绿色信息进行识别、筛选、提取和聚合,最终建立以绿色特征为基础的方案设计环境信息表达模型。以小型通用电机为例,验证了绿色特征的提取过程,并建立了该电机的环境信息表达模型。通过电机具体实例验证了该模型的正确性。     

基于Internet的三维模型协同浏览与批注系统

随着越来越多的跨国公司的出现和社会分工日益向国际化方向发展 ,企业的合作伙伴甚至同一企业的各个部门往往在地域上非常分散。这就给设计过程中设计人员间的交流造成了障碍。产品的三维模型、二维图纸和相关文档是设计人员间交流的重要载体 ,其中基于三维模型的协同交流在现代设计中尤为重要。本文实现了一个基于 Internet的三维模型协同浏览与批注系统 ,为异地、异构环境下设计信息的协同交流及冲突协商提供了一种有效的工具     

大型集装箱起重机产品快速配置模型及算法

为提高大型集装箱起重机产品设计的效率,提出面向快速设计的产品配置框架,构建了带约束的0-1规划基因进化模型,设计了一种基于改进蚁群的产品配置算法。模型中考虑了实例模板与客户需求的局部相似度、局部绿色特性满足度、配合亲和力等。结合大型集装箱起重机产品配置设计特点,重新设计了蚁群算法的伪随机比例规则;针对备选基因实例数量往往较多的问题,提出一种备选基因实例数量减少机制;设计了一种x_Sigmoid函数,并按此函数调整转移概率,加快算法搜索速度;实施捕食策略,加强较优区域的开发,增强搜索能力。通过集装箱起重机大车机构配置设计实例,比较了不同算法的优化结果,验证了所提模型和算法的有效性。