概念设计的功能结构求解Apriori算法

针对创新设计的要求,提出概念设计功能求解Apriori算法.分析概念设计中的功能求解映射.提出适应产品创新设计的概念设计求解映射模型.通过引入Apriori挖掘算法,完成设计功能向结构空间的映射.开发了概念设计自动求解映射系统,通过设计实例验证系统的可行性.     

产品配置设计的多层次映射求解模型研究

研究了配置设计中存在的基本映射单元类型，总结出7种基本映射单元类型；对配置设计的产品特征与。配置变量的映射关系进行了归纳与扩展，建立了功能域、行为域和结构域3个映射域，同时也建立了基于3个映射域的功能求解模型。结合电梯定制产品给出了实际应用，提高了产品配置的功能求解效率。     

复合功能产品概念设计循环求解过程及其实现

复合功能产品概念设计过程中,辅助功能的生成和求解往往伴随着目的功能的求解及其解的完善过程逐步得以实现;基于这一实际情况,提出了一种产品功能、效应、作用原理和结构方案循环交叉求解的计算机辅助概念设计进程模型,这一模型包含分解映射、求解映射和衍生映射3种映射模式和12种映射关系。分析了单一功能与复合功能各自求解进程,研究了接口表达、匹配及功能推理等循环求解关键实现技术,开发了一个面向复合功能产品的概念设计自动化原型系统,以硬币分离机的概念设计为例进行了验证。     

基于接口匹配的机电系统概念设计功能求解

在机电一体化系统概念设计过程中,功能结构的生成和功能求解是交替进行、互为因果的关系。基于这一实际,提出了一种基于功能→效应→作用原理→结构方案映射的机电一体化系统概念设计反馈循环求解模型。分析了单一功能与机电系统功能的各自求解进程,研究了接口匹配及功能求解等反馈循环求解的关键实现技术,开发了一个机电系统概念设计自动化原型系统,并以电脑绣花机的概念设计为例进行了验证。     

支持计算机辅助概念设计的机械产品创新过程动态建模

针对作为机械产品概念设计关键问题之一的过程建模,讨论机械产品创新过程中工作背景、市场需求等因素的变化对产品概念设计过程的决定性影响,在此基础上建立了环境—需求—功能—行为—结构(E-R-F-B-S)变量集映射动态模型,利用7种映射单元之间的有序组合归纳出4条产品创新链,为设计者在设计实践中的若干种创新思维过程建立简明的框架模型。通过确定创新链与有向图、有向图与稀疏矩阵的对应关系建立创新链的数学模型,进而提出并讨论创建以稀疏对称阵为输入变量的计算机辅助概念设计推理系统的合理构想。最后以辽河油田修井机传动系统的概念设计实例,说明创新链模型对机械产品创新过程的有效指导作用。     

需求/结构映射的灰关联相似性匹配与求解

产品概念设计过程中,为准确获得满足需求的结构方案,提出需求/结构映射的灰关联相似性匹配与求解方法。在灰关联相似性匹配与求解的两级实例推理模型中,设计了需求转化和功能求解的分层次灰关联求解映射策略。建立规范的需求/功能编码形式,并设定初步检索规则,缩小实例检索范围;设定差异信息比较规则,采用灰关联分析进行实例匹配,将需求和功能权重引入灰关联度的计算公式,使得推理求解符合概念设计的实际应用,自动获取产品概念设计的结构方案。通过在花蛤采收机和包装粉碎机设计中的应用,验证了该模型的有效性和可操作性。     

基于功构映射的拆卸设备设计方法

针对拆卸对象和拆卸过程对拆卸设备设计的特殊要求,提出了基于功构映射的拆卸设备设计方法。将拆卸设备的概念设计过程定义为需求域、功能域、行为性能域和结构域之间的映射过程和求解过程,利用面向对象技术构建了拆卸设备设计的需求信息集合;运用功能分解和功能表面集成规则构造了功能集合和行为性能集合;定义了拆卸设备设计过程的需求-功能映射模型和功能-结构映射模型。通过需求信息的层级提取、映射和参数化,生成了用于拆卸设备结构重构的基本约束矩阵,用于指导拆卸设备的创新设计。通过键盘拆卸设备的设计,验证了所提方法的有效性和实用性。     

产品概念设计过程中信息映射模型的研究

概念设计中的功能求解过程是产品设计中最能体现创新性的环节。在建立产品功能域、原理解域、结构域之间三层映射关系的基础上,通过引入逆映射、功能虚元、原理解虚元、虚链等概念,将域间复杂的信息映射过程简单化,以产品功能分解树的分解过程表示设计过程,以功能基、原理解、结构之间的对应关系表达设计知识,实现概念设计阶段与详细设计阶段产品信息表达的一致性。     

计算机辅助机械产品概念设计中几个关键问题的研究进展

本文对机械产品概念设计的定义、内涵进行了深入的论述;分析了市场需求与产品功能之间的关系;研究了基于工艺动作过程的机械产品概念设计和基于动作基本特征的执行机构库的建立方法;对机械产品概念设计创新性的具体实施方法进行了探讨;研究了计算机辅助机械产品概念设计的关键框架,提出了机械产品概念设计应按机械基本特点建立功能求解模型和组成机械方案.     

机械产品概念设计BFBS混合映射方法

为实现结构到功能的映射,提出一种行为-功能及行为-结构混合映射的方法.在定义行为模型、基本功能体和元功能的基础上,对行为、基本功能体和元功能进行详细分类,然后根据行为、功能和结构间七种基本映射类型,以行为作为中间过渡信息连接结构和功能,通过基本映射类型在行为、结构和功能间的反复混合映射,将产品结构与产晶功能紧密联系.最后由元功能对基本功能进行合并,根据合并过程所获得的功能组织结构,完成对产品各部分的理解,达到结构到功能映射的日的.通过在摩擦驱动装置分析中的应用,验证了该方法的有效性和实用性.     

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.     

基于知识的机械产品概念设计启发式求解

从能量转换的角度建立了产品概念设计的功能-行为-结构求解框架，分别采用输入输出转换和键合图对功能与行为进行建模；建立了概念设计的知识获取框架，基于功能-行为-结构框架抽取设计知识，结合产生式规则和面向对象方法进行对知识进行表示；基于A＊算法开发了一种启发式求解策略，通过模糊多准则决策定义了评估函数，继而对状态空间进行搜索并获取了满意解；结合自动门驱动装置设计实例验证了启发式求解算法的正确性。     

基于产品基因的概念设计

提出了一种基于特征的、通用的功能表达模型。通过对生物基因工程与产品原理方案设计的系统类比,引出产品原理方案设计中的信息遗传基础“产品基因”的概念,提出了“产品基因”的“转录”、“翻译”、“复制”以及“逆转录”机理,揭示了产品基因在功能设计与原理方案设计之间的桥梁作用。建立了基于产品基因遗传和重组的概念设计框架,并以一种新型硬币分离装置的原理方案设计为例进行验证。结果表明,该框架显然有助于产品概念设计阶段的原理创新。     

A multi-material part design framework in additive manufacturing

Additive manufacturing (AM) technologies provide more freedom to functional part design in various industries. One of the unique capabilities of AM is that multi-material parts can be produced with material compositional and geometric complexity. Multi-material parts have the advantage of achieving multiple performance requirements. In the research, we propose a framework for designing multi-material parts using AM processes. The proposed framework is composed of four interacting modules, including design requirement identification, primary material selection, AM process selection, material composition, and part geometry determination. Rules and guidelines for AM are integrated into the proposed framework with AM processes’ capabilities and constraints compiled in databases. We also introduce databases to assist in decision-making and ensure manufacturability of the designed multi-material part in various product design phases. The proposed framework is applied to a case study involving a conceptual design of a multi-material battery pack cooling plate.     

机械传动概念设计解与动态性能分析集成建模

基于可扩展单元线性图(Extensible elementary linear graph,EELG)的改进模型,通过增设两个运动特征定义弧,用来描述机械传动组件,以得到包含运动学与动力学信息的拓扑矩阵以及运动特征矢量,实现机械传动概念设计解与动态性能分析的集成.其中拓扑矩阵自动生成系统动力学方程并求解,完成定量分析,而运动特征矢量则是对传动功能进行定性分析.在该模型基础上,构建机械传动功能原理解知识库,通过智能化求解模型,产生满足设计需求的多个原理解,并且自动仿真原理解的动态性能,为设计者优化选取设计方案、配置组件的类型及设定关键参数提供依据.     

Concept optimization for mechanical product by using ant colony system

The aim of conceptual design is to generate the best design candidate. Concept solving in conceptual design can be viewed as a problem of combinatorial optimization, in which there exists a “combinational explosion” phenomenon when using the traditional morphological matrix method to tackle it. In this research, a concept optimization problem is studied based on an Ant Colony System (ACS). By analyzing the similarity between concept solving and Traveling Salesman Problem (TSP), concept solving is transformed into a problem of optimal path in combinatorial optimization, where the dynamic programming based solution space model and the longest path based optimization model are developed. Then, the ant algorithm to resolve TSP is adopted to implement concept optimization according to the positive feedback searching mechanism of ACS, and some improvements are made incorporating crossover and mutation operators of a genetic algorithm (GA), to obtain the optimal scheme rapidly and effectively. Finally, a conceptual design case of press is given to demonstrate the feasibility and rationality of this proposed approach. The employment of ACS enables concept solving to be implemented with an algorithm and thus possesses better operability, which offers a promising way to solve the “combinatorial explosion” problem in conceptual design.