Fuzzy Reconfigurable Design Principles and Methods of Complex Mechanical Products

In order to overcome the limitations of the existing theories and methods for reconfigurable design and achieve a rapid design of new products, fuzzy reconfigurable design principles and methods of mechanical products are proposed by introducing the fuzzy set theory into the reconfigurable design after analysis of the fuzziness in design inputs, mapping relationships between design domains, and design solution procedures. Taking the overall design of a 350 km/h high-speed train bogie as an example, the house of quality (HOQ) tools are used to build a fuzzy matrix for the bogie to solve for the target parameters and their importance. The membership functions of main performance parameters of bogie are given, and a similarity degree identification of bogie is made using distance closeness degree. The results show the 300 km/h bogie, with a distance closeness degree of 0.91, is closet to the design goal. Furthermore, the direction of design modification is determined by parameters competitive analysis, so the reuse of resources and design innovation of bogie can be achieved rapidly.