Research On Method Of Function-Oriented Visual Innovation Conceptual Design

Conceptual design lies in the early stage of the product design process. It is of great significance to the entire life cycle of the product. The goal of product design is to achieve product functions where the core problems are the function modeling and the solution process of innovative design of functions. The important way to enhance the ability of the conceptual design is to combine the designers'creative thinking with the computers'power of reasoning computing.After an integrative analysis of the state-of-the-art about conceptual design at home and aboard, focusing on current main problems in the research of computer-aided conceptual design, this dissertation discusses the description, methods and system realization of the function-oriented visual innovative conceptual design. There are some theoretical and applicable results listed as follows:(1) Research on innovation-oriented function modelBased on studying the theory and implementing method of the conceptual design at home and aboard, the important roles of functions in the solution process of innovative conceptual design are confirmed. By analyzing the problems in current function's definition, the function model is defined, which is based on granular computing and reflects the characters of problem solving. The representation of function granularity, functional hierarchy structure and rules of functional granularity computing are given, and then the modeling process of functional model based on similar reasoning is also proposed.(2) Innovative reasoning methods of the function modelReasoning ability is one of the main features of human intelligence. Fuzzy reasoning is the theoretical basis and core of the fuzzy expert systems and fuzzy control system, which is also an important tool to handle fuzzy information and attain machine intelligence in information science. Function-oriented innovative conceptual design contains the inspiration and creativity from the designers'thinking and also the fuzzy reasoning process for functional models. Aiming at the features of conceptual design, two ways of getting a reasonable function model quickly from function requirements are proposed where one is triple I fuzzy reasoning and the other is similar fuzzy reasoning.(3) Research on human-computer functional design system based on information visualizationOne source of innovative reasoning on functional model is the computer's logic reasoning, which is obtained by the logic and computable part of the human intelligence. The other source is designer's creative thinking, which is inspired by computers and used into design process. Both are indispensable.The function-model format language FFL is defined, while the FFL model (standardized and described function model in FFL language) is set up. And, information visualization is brought into the innovative conceptual design. The mapping between FFL model and visualization model and visualization view is built, and a vivid dynamic view is displayed by multiple visualization methods. With the support of human-computer interaction, the flexibility, effectiveness and interactivity of innovative reasoning are improved, thus the efficient solutions of innovative design are obtained. At the same time, the progress of logical reasoning is promoted; the rationality and innovation in logical reasoning are enhanced.(4) Realization of the prototype system of function-oriented visual innovative conceptual designOn base of the above-mentioned theoretical framework, relying on industry research projects, combined with the business needs on product innovation, a function-oriented visual innovative conceptual design system is developed, including subsystems such as human-computer interaction, function modeling, concept solving, result output and information management. This system has been applied to the innovative design of underground boring machine, as a result the laser-based binocular three-dimensional surface modeling system is proposed, where a national software copyright registration is acquired due to the prototype system; a national patent of invention is achieved from the laser-based binocular three-dimensional surface modeling system.