| As the study of the state's "tenth five-year" science and technology project-Research on Internet-based NC (Numeric Control) Machine Tools Form Design and Humanized Interface Technologies and Implementations Based on the Knowledge of Design and Knowledge of User-this paper focuses on the characteristics of knowledge in the process of NC machine tools design and the applying of knowledge in CAID system.Firstly, this paper discusses the concept of "design" and "design system". Then, the paper analyzes the contents and characteristics of descriptive knowledge and procedure knowledge of NC machine tools CAID system in the view of knowledge and knowledge system, and the characteristics of knowledge of design and knowledge of user in the view of industrial design.Secondly, this paper discusses the three main contents in design of NC machine tools, which are form design, color design and human factors design. And the paper analyzes the process of design with an example, either.Thirdly, an experimental research of the knowledge of NC machine tools industrial design and the process is discussed in the paper. The measurements of questionnaire, task analysis and verbal protocol were used in the experiments. From the experiments, we find that the process of NC machine tools industrial design is a "stepwise refinement" process.On the basis of the experiment, the paper analyzes the knowledge and the applying of NC machine tools industrial design, and the knowledge model and its application model of NC machine tools CAID system are taken out. Finally, the paper discusses the two main functions of the system - aid and design- and the form of the system realization. |