可复用设计方法及其基本过程的研究

在总结和发展几种智能化设计方法的基础上 ,提出了可复用设计的概念。阐述了可复用设计的基本方法 ,给出了可复用设计基本过程的形式化描述 ,并对设计知识的可复用性及其度量问题进行了讨论。     

基于分层实例推理的混合型行业工艺设计系统研究

混合流程型生产行业的生产周期长、工艺过程复杂多变,工艺设计知识的提取和表达比较困难,若采用传统的单一大型实例推理系统表示其工艺设计方案,将造成实例库的庞大和冗余,求解效率低下。针对该问题,提出了基于分层实例推理的混合型行业的工艺设计策略。通过设计问题的逐步分解以及不同层次的多实例重用,既充分利用了实例推理方法的优点,又降低了搜索空间,提高了实例检索效率;研究了不同层次下工艺实例的知识表达、实例库的组织结构,以及实例的分层检索匹配算法,并以某钢铁产品订单的工艺设计问题为例加以说明;最后,给出了基于分层实例推理的混合型生产行业的智能工艺设计系统的总体框架,并总结了该方案的优点。     

产品色彩设计中的知识组织与应用

应用智能设计、色彩设计理论，在分析色彩设计过程中设计知识构成的基础上，提出了将设计通用知识和特例知识结合用于色彩设计系统的一种方法，讨论了实现这样系统要解决的知识组织、知识搜索和实例修改等问题；提出了一种根据领域通用知识进行色彩设计过程控制的方法。在机床造型设计系统中的色彩设计分系统的应用取得了初步的成果。     

知识驱动协同创新的产品开发模型

为提高产品创新能力,提出了知识驱动协同创新的产品创新理念,并构建了具有6层结构的产品创新开发系统模型,包括协同平台、开发过程链、产品创新设计、分析评价、智能再设计和知识资源层等。研究了知识驱动协同创新的创成和吸纳相集成的原理、再设计建议的智能化生成方法及其过程链流程组织策略。产品协同创新的创成和吸纳过程通过集成推理实现;创新的产品方案再设计建议通过分析和仿真方法生成;产品创新开发过程链采用基于知识管理的流程组织方法。应用实例表明,已开发的系统体现了模型的基本功能,具有可操作性和实用价值。     

基于粗糙集的钢铁行业工艺知识发现方法

针对钢铁行业工艺过程复杂多变、导致工艺知识难于提取的问题,提出了基于钢铁产品特征分层设计、逐级求解的工艺知识发现策略,并在构建工艺数据集市的基础上,建立了基于粗糙集属性约简的钢铁行业工艺知识发现方法.以某钢铁集团企业两级工艺决策信息表为例进行实例验证,结果表明,所获得的工艺决策知识能够指导工艺决策者实践,并总结了该方法的优点.     

汽车空调换热器智能设计系统研究与开发

根据智能设计原理，对汽车空调换热器设计过程的经验知识进行了归纳和总结，提出了分级规划和阶段设计综合求解策略，用ＢｏｒｌａｎｄＣ＋＋语言开发了汽车空调换热器智能设计系统软件，为工程设计人员提供了一种有效的汽车空调换热器设计工具     

An intelligent interactive approach for assembly process planning based on hierarchical classification of parts

Assembly process planning is a difficult problem in the product design and development process. In order to reduce the difficulty of assembly process planning (APP), this paper presents an approach to finding a practical plan for assembly process through the intelligent interactive method based on hierarchical classification of parts. First, two hierarchical classification principles towards interactive disassembly are presented based on the key assembly constraint (KAC). Then, the initial assembly relationship of the product is readjusted to a new hierarchical structure which is more suitable for assembly planning according to a novel hierarchical classification algorithm. On the basis of the new hierarchy of product, an intelligent disassembly-based approach is presented, which not only takes full advantage of the ant colony algorithm for searching and constructing an initial assembly sequence with three available assembly principles, but also makes full use of the experience and knowledge of the human being for achieving a better assembly process. The intelligent disassembly approach can achieve an optimized assembly sequence, paths and scheme necessary information regarding the required assembly fixtures and tools. Finally, a case study shows that the proposed approach is feasible and practical.     

智能CAD系统中的知识表示与知识获取策略

分析了智能ＣＡＤ系统中复杂产品设计过程特点和设计目标的可分解性,论述了设计子目标与知识库间的内在联系,建立了基于元知识控制的分层框架引导的层次化知识表示与知识库模型,提出了基于概念与或树模型的智能化多级领域知识获取策略。     

CAPP面向对象知识库管理系统的设计与实现

知识库是 CAPP系统的核心。本文采用面向对象方法对工艺知识进行表示与组织 ,在此基础上设计开发了 CAPP面向对象知识库管理系统 (OO- CAPP-KBMS) ,并对面向对象知识库管理系统的体系结构、设计与实现方法及所采用的一些关键技术作以介绍     

流程企业智能排产与优化调度技术

以石化企业为背景，深入分析了流程企业的生产特点及当前计划排产与优化调度研究的现状，重点阐述了智能排产与优化调度系统的结构模型，提出并解决了基于综合物流和解耦策略的优化排产技术以及基于主动式数据挖掘的渐进调合等关键技术问题，采用Multi-Agent技术实现了原型系统的开发，为流程企业生产的优化提供了新的方法与技术。     

An Intelligent Knowledge-Based System for Product Cost Modelling

An intelligent knowledge-based system for product cost modellingis presented in this paper. The developed system has the capability of selecting a material, as well as machining processes and parameters based on a set of design and production parameters; and of estimating the product cost throughout the entire product development cycle including assembly cost. The proposed system is applied without the need for detailed design information, so that it can be used at an early design stage, and, consequently, redesign cost and longer lead time can be avoided. Hybrid knowledge representation techniques, such as production rules, frame and object oriented are employed to represent manufacturing knowledge. Fuzzy logic-based knowledge representation is applied to deal with uncertainty in the knowledge of cost model to generate reliable cost estimation. This paper deals with cost modelling of both a machining component and an injection moulding component, which is a process that gives high production rates, excellent quality and accuracy of products, and low manufacturing cost. Based on the analysis of the moulded product life cycle, a computer-based cost model was developed which integrated the relationship between cost factors, product development activities, and product geometry. The estimated cost included the costs of material, mould and processing. The system has been validated through a case study.     

知识管理体系及其在系统集成环境中的集成

针对产品研发过程中知识管理与应用的实现问题,在知识管理层次体系基础上提出了产品系统开发智能化集成环境的构建方案.从知识本质特征分析人手,得出知识的运用与管理是通过构建知识工具、维护数据载体、进行知识过程控制来实现的结论.探讨了知识管理的实现机制,通过协调知识、数据、过程、工具之间的关系,给出了支持工程应用的知识管理体系与功能阶段.基于知识管理的体系层次,给出了支持产品分布式集成开发环境的功能体系技术方案,定义了基于知识的集成环境的智能化操作流程.     

CREATIVE DESIGN BASED ON KNOWLEDGE MANAGEMENT IN ENGINEERING DESIGN

To support and serve engineering design, creative design based on knowledge management is proposed. The key knowledge factors of creative design are analyzed and discussed, and knowledge extraction tools are utilized to distill the important knowledge to serve for knowledge resource of creative design. The implementation of creative design mode is described and executed, which can promote the intelligent asset of the enterprise and shorten the period of creative design. With this study, design afflatus and conceptual design can be achieved expediently and effectively.     

基于模糊粗糙集模型的注塑模浇注系统方案智能化设计研究

选择影响注塑件质量的注塑模浇注系统方案为研究对象,提出了浇注系统方案智能化设计策略。考虑到浇注系统方案设计中存在的模糊性和不确定性等因素,对经典的粗糙集理论进行了扩展。将等价关系扩展为模糊相似关系,提出一种模糊粗糙集模型归纳学习算法,并利用此模型建立了具有规则数目少、规则简捷等优点的浇注系统方案设计模糊知识库,并开发了一个浇注系统方案智能化设计原型系统。设计实例初步表明该研究工作和开发的设计原型系统能提高浇注系统设计效率。     

支持产品形象识别的色彩智能设计模型研究

为了解决产品色彩设计过程中的形象识别问题,进而在CAD平台上实现支持产品形象识别的色彩智能设计,在明确色彩设计领域知识的基础上,结合产品家族色彩方案库,通过层级关系结构图建立了产品形态识别数据与色彩识别数据之间的映射,构建了基于产品家族色彩方案库的色彩智能设计模型,实现了支持产品形象识别的主色驱动配色和智能色彩衍生设计。同时,初步完成了原型系统的开发,实现了系统与三维设计平台SolidWorks2006的集成,并在产品的色彩设计中进行了应用验证。     

复合肥生产过程计算机控制系统

本课题是国家科技部第一批产业技术创新战略联盟项目的子课题。也是天津市科技计划项目的子课题。文章中介绍了复合肥生产过程计算机控制系统。重点介绍智能流量比值控制系统方案设计和实施。本课题的创新点在于采用智能流量比值系数控制技术,智能多模态控制技术,智能PID控制技术,综合滞后补偿控制等技术,提高了控制精度及配料的准确性。在降低工人的劳动强度、提高产品质量的同时增加了生产的安全性,延长了设备的使用寿命。使复合肥生产过程中实现了无“三废”排放。创造了良好的经济和社会效益。     

An intelligent system based on concurrent engineering for innovative product design at the conceptual design stage

This paper describes the development of an intelligent system based on concurrent engineering for generating design alternatives at the conceptual design stage. The proposed system encompasses a design analysis module, a design evaluation module, a knowledge acquisition and storing module, a user interface and databases. It is also integrated with a spreadsheet application for storing data and numerical analysis and works in combination with a material selection software Cambridge engineering selector (CES) to facilitate the material selection process. The tangible advantage of implementing this system is that it enables the designer to explore and experiment with alternative ideas in the early design stage, and it results in design solutions that are functionally sound- and cost-effective. It also has the capability for design alternatives evaluation, material selection and modelling the product detailed design on the computer-aided design system. Therefore, an efficient product development process is generated. Three case studies are demonstrated and discussed to validate the proposed system.     

面向铁路货车的设计知识管理系统研究与开发

针对铁路货车设计特点和研发需求,以支持铁路货车研发流程的知识驱动为目标,开展了面向铁路货车设计知识管理系统的研究,提出了基于本体和产生式规则的铁路货车知识混合表达方法、面向研发流程的设计知识关联模型,以及基于用户模型的设计知识重用等关键技术,解决了铁路货车设计知识组织、管理和使用的难点问题。在此基础上完成了面向铁路货车的设计知识管理系统的开发。     

An Improved Rough Set Approach to Design of Gating Scheme for Injection Moulding

The gate is one of the most important functional structures in an injection mould, as it has a direct influence on the quality of the injection products. The design of a gating scheme includes the selection of the types of gate and calculation of the sizes and determination of the location, which depends heavily on prior experience and knowledge and involves a trial-and-error process. Due to the vagueness and uncertainty in the design of a gating scheme, classical rough set theory is not effective. In this paper, a fuzzy rough set model is proposed, which is not based on equivalent relationships but on fuzzy similarity relationships. An inductive learning algorithm based on the fuzzy rough set model (FRILA) is then presented. Compared to decision tree algorithms, the proposed algorithm can generate fewer classification rules; moreover, the generated rules are more concise. Finally, an intelligent prototype system for the design of a gating scheme based on an induced fuzzy knowledge base is developed. An illustrative example proves the effectiveness of the proposed method.     

MULTI AGENT COLLABORATIVE DESIGN SYSTEM MODEL BASED ON THE INTERNET AND EXPERIMENTS

0 INTRODUCTIONDstributed Artificial Intelligence(DAI ) is one ofthe imPOrtant branches of artificial intelligence. In thedomain of artificial intelligence, agent is used torepresent the object with some intelligence andautonomous decision-making function so as todistinguish it from common object.The agent isusually called" Autonomous Object" .A distributedartificial intelligence consists of many agents. Typicalstructure of an 8gent includes the partial knowledgebase, inference and dec…