基于产品生态学的概念设计研究

为提高产品的创新性,提出了一种基于产品生态学的概念设计框架.研究了生物工程和产品概念设计之间的相似性,在分析了产品基因、产品细胞、产品器官、产品生物体、产品种群和产品群落模型的基础上,提出了产品生态学模型,构建了相应的概念设计过程模型,并以纺织装备产业的产品创新为例进行说明.     

基于知识的计算机辅助产品概念设计原型的研究

未来的CAD应该支持产品“需求分析——概念设计——具体化设计——详细设计”全设计过程。介绍了典型的产品生命周期以及面向产品全生命周期的集成产品模型和多视图产品模型数据库，在讨论了知识管理和基于知识的工程(KBE)系统框架的基础上，提出一种基于知识的产品概念设计原型并对未来的工作进行了展望。     

概念设计阶段产品轻量化设计与评价方法研究

概念设计阶段主要进行产品原理解构建,是决定产品性能的重要阶段。针对现有确定方案在后端进行轻量化的现状,在概念设计阶段进行产品的轻量化方案设计并评价其轻量化结果,形成一种轻量化前端设计与评价方法。首先根据需求、EE-FBS功能模型求解产品的原理结构,然后从原理结构中界定轻量化操作单元—原理构件,之后基于原理构件的理想化水平选择轻量化对象,接着基于Inspire(仿真驱动设计软件)对轻量化对象进行拓扑优化,并基于轻量化对象的理想化水平变化率建立轻量化评价体系以评价轻量化结果的合理性;最后以便携式阻车器的轻量化过程验证了理论的实用性和有效性。     

3维虚拟设计环境下的机械产品概念设计

分析了3维虚拟设计环境下的机械产品概念设计的特点,给出了基于定向发散创新设计方法的概念设计定义。将概念设计划分为2个基本部分：含光、机、电、液广义传动机构的3维虚拟设计和广义传动机构载体的工业美学设计。3维虚拟设计环境下的概念设计方案是完成了原理方案设计和构型设计的设计方案,是一种能够满足市场需求的3维虚拟样机。面向对象、方案评价与修改的实时性、3维虚拟性和定向发散性是该概念设计的主要特点。     

计算机辅助机械产品概念设计技术探讨

提出一个支持机械产品“需求分析 概念设计 详细设计”全设计过程的计算机辅助集成设计工具的框架 ,介绍产品设计过程模型 ,面向全生命周期基于广义特征技术的产品信息建模方法、概念设计方法以及设计过程各阶段的集成技术。     

支持概念设计的分布式协同设计环境的研究

一个复杂产品的概念设计往往需要多学科领域专家之间的协同。基于黑板模型 ,本文提出了一个分布式模块化协同设计框架结构。首先分别介绍了支持该框架结构的几个关键技术 ,即产品信息共享模型、设计问题的分布式构模方法以及基于约束的冲突检测方法。然后利用这些框架支持技术以及网络使能技术开发了一个分布式模块化协同设计环境 DCMDE,能有效地支持不同地理位置、不同学科的设计人员进行机械产品的协同概念设计。一个齿轮箱协同方案设计实例显示了系统的有效性     

基于设计目录的机械产品原理方案智能设计平台的研究

探讨了机械产品原理方案设计的开发及其在方案设计中的应用,并提出了一种基于设计目标目录的原理方案智能设计平台的构造模型。     

基于产品基因进化的结构设计自动化

基因是人类研究自然界遗传和进化的重要依据 ,在现代机械设计中 ,将基因工程思想用于产品结构设计 ,从未知产品根本需求和实现功能出发 ,在广义定位原理和基于功能表面分解重构技术基础上 ,形成“产品基因”这一全新设计理念 ,进而以此为依据提出基于产品基因型进化思想的产品建模方法 ,并用实例验证这一方法的优越性。     

基于模糊多目标免疫算法的概念设计

针对概念设计中方案设计的组合优化问题,如何避免组合爆炸、快速有效地产生一些可行方案的难题,提出多模糊集代数和定理以及模糊集比较定理,根据产品功能与功能载体、功能载体与功能载体之间的相互关系,利用模糊集理论建立了产品模糊矩阵和模糊多目标优化数学模型,并根据免疫细胞进化原理提出一种有效的多目标免疫优化算法.以带式输送机的传动方案设计为例进行验证,试验结果显示这种方法能够快速产生可行方案集,实现方案的自动化设计.     

基于公理化设计的产品方案设计可拓配置模型

针对具有多层次、多属性、创造性的产品方案设计配置,提出了一种基于公理化设计和可拓理论的复杂产品方案设计可拓配置模型。该模型通过设计实例建立复杂产品方案设计的公理化设计框架,从而对设计对象进行可拓变换、可拓数据挖掘并建立关联函数,提出了产品方案发散式可拓设计方法与蕴含式可拓设计方法,给出了产品方案设计可拓配置模型与算法实现过程。最后,通过实例对模型的有效性和可操作性进行了验证。     

基于产品基因分解重构的生长型设计

将基因工程思想用于产品的进化设计过程，通过对产品基因的多级分解提出了产品组成单元的进化策略。在给出基于功能约束的产品基因分解数学模型的基础上，将装配复杂度及制造复杂度作为有效的控制约束引入其中，得出了产品基因的最优划分策略，在此基础上提出了基因重构方法。用滚子夹具设计实例验证了设计方法的有效性。     

A feature-based approach towards an integrated product model in intelligent design

Conceptual design is an early stage in the product design process, which has an essential effect on the product innovation. Existing approaches for product knowledge engineering for conceptual design always focus on knowledge modelling and organization, etc. However, the traditional approach is lack of better comprehending representation and reuse of design knowledge in conceptual design. This paper is devoted to presenting a systematic effective integrated modelling approach of principle solutions in conceptual design to make the knowledge of functional design be transferred efficiently to the subsequent principle conceptual design and structure conceptual design process, and even detail design. With the introduction of the physical quantity model, feature-based representation model of function, effect, physical quantity, working principle and structure concept are put forward step by step, and then an integrated principle solution model is presented based on the generalized assembly model. The knowledge organization method of principle solutions based on physical quantities is also proposed. Conceptual design process based on integrated modelling and knowledge organization of principle solutions is presented, which discloses that physical quantity model is a bridge across functional design, principle conceptual design and structure conceptual design. The conceptual design of new devices for decreasing resistance of petroleum equipment offshore platform is given as an example, which demonstrates that the methodology is obviously helpful to increase opportunities for product innovation in conceptual design.     

Genetic model for conceptual design of mechanical products based on functional surface

Computer-aided conceptual design (CACD) aims to increase efficiency and quality of design work but with little essential progress due to the gap between abstract concept and detailed structure. In order to tackle the problem concerned with conceptual design process and automation, this paper introduces the concept of functional surface as the information carrier to link together product function and structure and describes a product genetic model to represent and organize product information. Functional surface is used to formalize the product gene, a varied-length coding scheme for functional surface and product gene is proposed, and the design process model for conceptual design is established based on product gene. Finally, a prototype system for CACD is introduced to demonstrate how a product can be designed based on the proposed model.     

Research on collaborative conceptual design based on distributed knowledge resource

Conceptual design is an early stage of the whole product development process, which involves the generation of solutions to satisfy the design requirements. It is a crucial issue on how to find proper principle solutions from enormous, isomeric, and even distributed knowledge resources repositories and then ally with these correlative distributed knowledge resources providers to collaborative conceptual design. Design is a task-solving process using corresponding resource, so it does not always have an agency in product design. This paper proposes a model of collaborative conceptual design based on distributed knowledge resources, which is centered on design tasks and based on dynamic knowledge alliance without agency. After a model of knowledge resource unit and a model of Web services based on knowledge resource are proposed, a virtual quantitative and qualitative knowledge resource representation based on knowledge grid is then put forward. The mixed knowledge resource repository is also proposed to support collaborative conceptual design. The strategies of knowledge register, publish, storage, reorganization, orientation, and problem solving based on mixed knowledge resource repository are then discussed in detail. The data exchange mode of principle solutions is then described. The selection strategy of dynamic knowledge alliance members is established. The framework of distributed knowledge resource is also put forward to support collaborative conceptual design. The process of collaborative conceptual design based on distributed knowledge resource is then proposed. The conceptual design of new devices for decreasing resistance of amphibious vehicles is given as an example, which demonstrates that the methodology is obviously helpful to produce valuable principle solutions with distributed knowledge for product innovation.     

面向产品创新的功能空间拓展进程

在基于功能－效应－原理解映射的概念设计研究中,建立功能和效应特征模型,通过引入变体功能和物理量,揭示变体功能在产品功能设计中的桥梁作用,使得功能域在功能设计过程中逐渐分层扩大。系统地提出基于目的功能变异和效应物理量推理的功能空间拓展策略,从而实现从基体功能到物理量的一对多的映射。在此基础上构筑一种由基体功能层、变体功能层、效应层和物理量层构成的四层次、三阶段功能空间拓展进程模式：基于目的功能变异的功能空间拓展、变体功能向效应的拓展以及基于效应物理量推理的功能空间拓展。研制一套相应的计算机辅助功能设计软件平台,并以两栖车辆减阻装置的功能设计为例进行验证。结果表明,基于该模型通过实现功能分层次系统拓展,实现产品功能和概念解的方法学拓展和系统学创新,从而增加产品创新的机会。     

基于共生进化原理的功能结构设计

从生物的共生进化模式得到启发,从设计认知的高度,系统地总结了基于共生进化原理的共生功能之间的关系,包括“提供作用条件”关系,“消除有害副作用”关系和“消除有害环境影响”关系三类。这些关系为系统地解决创新设计中基于可行原理解的功能结构设计问题奠定了基础。在此基础上提出了集成原理方案设计和功能结构设计的计算机辅助概念设计的进程模型。该进程模型能根据实际创新设计环境以及候选原理解的作用条件、副作用和环境影响,在求解过程中动态地生成待求产品的功能结构,符合设计师的思维习惯。最后给出了模型应用实例。     

PRODUCT GENE REPRESENTATION AND ACQUISITION METHOD BASED ON POPULATION OF PRODUCT CASES

The representation and acquisition of a product gene is a crucial problem in product evolutionary design. A new methodology of product gene representation and acquisition from a population of product cases is proposed, and the methodology for product evolutionary design based on a population of product cases is realized. By properly classifying product cases according to its product species, the populations of product cases are divided and a model is established. Knowledge of the scheme design is extracted and formulated as the function base, principle base, and structure base, which are then combined to form a product gene. Subsequently, the product gene tree is created and represented by object-oriented method. Then combining this method with the evolutionary reasoning technology, an intelligent and automatic evolutionary scheme design of product based on the population of product cases is realized. This design method will be helpful in the processing of knowledge formulation, accumulation, and reuse, and in addressing the difficulty of acquiring design knowledge in traditional design. In addition, the disadvantages of manual case adaptation and update in case-based reasoning can be eliminated. Moreover, by optimizing the design scheme in multiple levels and aspects of product function, principle, and structure etc., the level of creativity in the scheme design can be improved.     

基于功能表面的产品基因形式化表达

利用功能表面来形式化表达产品基因以支持机械产品概念创新设计。用数学方法描述了功能表面模型和产品基因模型,提出了一种变长度的产品基因层次编码方案,构建了基于功能表面的产品基因形式化表达过程,并用设计实例对提出的方法进行了验证。     

基于工艺动作过程的机械执行系统概念设计过程模型

机械产品概念设计的目的是获得产品设计方案,以便为后续的详细设计奠定基础。为了获得较好的产品设计原理方案,需要对机械产品在概念设计阶段的过程模型进一步研究。在前人的研究基础之上,主要针对机械执行系统概念设计过程模型进行研究,提出基于功能-作用原理-工艺动作过程-执行动作-行为-功能载体过程模型和相互之间的映射策略,把产品概念设计的过程模型进一步细化,以更好的符合人们在产品设计过程中的逻辑思维,从而便于提高设计人员的创新能力。