关键词: 概念设计, 再创新, 键合图模型, 功能模型图, 建模

Abstract: A function-driven conceptual design method was proposed to assimilate and recreate the existing product. Firstly, the analysis requirements were mapped to bond graph models according to three different grain sizes. And bond graph model of the system was constructed. Characteristics and limitations of the original design in existing product were analyzed from the system dynamic performances. Strong points were good for assimilating the original designer's intention, while limitations were helpful for product recreation. Then functional models were used to decompose the top function into sub-functions to get more detailed information about the limitations. Finally according to these limitations, technical evolution routes were adopted to redesign the parts of sub-functions, through which the recreated system could obtain more excellent functional representations. Applying the method to a frictional driver, the control and dynamic performances of the frictional driver were both improved, which verified the validity and feasibility of the proposed design method.

Key words: conceptual design, recreation, assimilation, bond graph modeling, functional model