Research On The Method Of Self-Organizing Configuration Design For Vehicle Leaf-Spring

Leaf-spring is an important safety component with high load to guarantee vehicle riding comfort and handling stability. In the current design of Vehicle leaf-spring, there are some problems of design method and process such as heavy calculating and manual work, poor design reuse and adaptability, which exert negative effects on the improvement of product development and market competiveness of the enterprise.Considering the feature of vehicle leaf-spring and other products similar to it, a new method of self-organizing configuration design for vehicle leaf-spring is put forward through the analysis of Product Rapid Design and Product Configuration Design. The method is a combination of self-organization and configuration design, which makes it possible to combine, calculate and reason in self-organizing mode during the process of design so that design quality and efficiency can be improved. The main research contents of the dissertation are as follows.(1) Starting with the concept model of product self-organizing configuration design, the process of product self-organizing configuration is described based upon the theory of entropy and dissipative structure respectively. Implementation process and support technologies of product self-organizing configuration design are put forward.(2) Design knowledge in product self-organizing configuration design is classified. Combined with the theory of knowledge granularity, knowledge representation model is built for design requirement and configuration unit respectively, and mapping rules from design requirement to configuration unit are described. Knowledge coding method is researched in product self-organizing configuration design. Consequently, the method architecture of knowledge representation is formed for product self-organizing configuration design.(3) The type of solution for initial configuration unit is generalized in self-organizing configuration design for vehicle leaf-spring. Based upon genetic algorithm, the solution of initial configuration unit is researched for fuzzy or probability mapping. Meantime, aiming to multi-requriements'effect, a solution model of Neural Network is constructed, which is testified by an example.(4) The method of information combination of configuration units is analyzed in self-organizing configuration design for vehicle leaf-spring, and the calculation of self-similarity between configuration units is researched. Based upon fractal theory, combination model for self-organizing configuration design for vehicle leaf-spring is built and the method of fractal plan is present. Meantime, process model is constructed for self-organizing configuration design for vehicle leaf-spring. Additionally, aiming to the structure scheme after the combination of configuration units, the technology of rapid parameter configuration is researched for configuration unit with a certain structure on the basis of Neural Network.(5) Evaluation indexes are constructed for the process of self-organizing configuration design for vehicle leaf-spring. Based upon the theory of matter element, the method of evaluation is researched for the process of design, and measures for feedback and improvement is put forward according to the result of evaluation so as to correct and improve some stages and parts of the process.At last, engineering application of self-organizing configuration design for vehicle leaf-spring is researched, and a system of design is developed to testify the method mentioned in the dissertation.