Research And Application Of Knowledge-based Complex Product Industrial Design Assisted System

Knowledge-based design has been the focus of modern design research andtransformation trend from traditional experience-based design. The progressive formdesign requirements of CNC machine tools, as the representative of complex products,has brought new challenges and opportunities to the traditional industrial designresearch and practices into new challenging&innovative topics. This paper initiates aknowledge-based assisted industrial design system concept by deploying a series ofstudies to facilitate it into realization. The thesis aims at the development ofknowledge-based design support system for CNC machine tools in order to solveintegrated form design problems of this typical complex product and to meet theinformation technology and design capability updating requirement for heavyequipment industry. The main content of this dissertation is the industrial designknowledge acquisition and expression issue of complex product at the system leveland subsequent implementation techniques, and the construction of suchknowledge-based Industrial Design assisted system. Being supported by several statelevel key research project, this thesis proposes and improves the case-based industrialdesign knowledge representation mechanism and scenarios based industrial designproduct design technology, then establish a task-scenarios based CNC form designintegrated information model, a user-oriented design support platform based on Client/Server architecture for industry.Based on the CNC machine tool design process, research started from thepersonnel needs and behaviors of designers with which design thinking (mental)models, process and habit were analyzed by carrying out series of empirical researchmethods including design survey, design task study and image congnition experiments,in order to excavate and obtain CNC machine product design domain ontologyknowledge. Through transfering and expressing of traditional experience knowledgeand process knowledge, research plan to achive a task-based situational informationmodel by case&scenario theory and then construct a design-case library systemwhich contains more than300s product form design cases and2000s design proposals.After repeated verification tests for subsequtial prototype system, the research finallydeveloped and established a knowledge case-based complex product form designassisted system: KB-ICAID, which being capable of stimulating the design process ofactual design project management, case retrieval, re-engineering and other practical functions and be able to apply on practical design projects. As the verification andapplication process, the KB-ICAID system has been practiced in some real designbusiness program with several large domestic machine tools company, illustrated thefeasibility and practicality of this knowledge supporting system and its construction.The complexity and ambiguity of industrial design problem solving process tellus the existing concerning benign knowledge acquisition, representation techniquesfor structural problems cannot be used directly in the field of industrial design. Thereis an imperative need for specialized and targeted knowledge research method andtechnique. Thesis draws on artificial intelligence, psychology, sociology and otherresearch results by following the imperical research ideology, sets up psychologyexperiments based, qualitative and quantitative combination method for designknowledge acquisition, expression and modeling. Tacit and experiential knowledge ofindustrial design process and experts’ knowledge were mined and then extracted intodesign knowledge system in order to support product design process and the domainontology knowledge acquisition. The main contribution of this thesis is the designknowledge presented case studies and situational theory and complex expressioninformation model.With the "user-centric" software development ideas, research have constructeddifferent levels of knowledge-based product design system-ICAID, CBID andKB-ICAID etc. to modeling design knowledge and design process by case-expressionand task scenarios conversion which can effectively assist designers in CNC machinetool industrial design field, the usability of such concept supporting system has alsobeen evaluated and applied in numbers of machine tool enterprises.