Research And Application Of Product Personalized Requirement Conversion And Modular Design Evaluation

Accurate access to individual customer needs is the first step in product development.To meet the individual needs of customers,shorten the production cycle,reduce design costs while enabling customers to maintain a high degree of satisfaction has become the focus of large complex equipment manufacturers.Modular design through the unit division,similar reuse,arrangement and other methods can quickly respond to customer needs customization.In this paper,the key technology of product design,such as customer needs analysis and conversion,module division,design evaluation and other key technologies are researched in combination with the national key scientific and technological project "Digital Design Method,Tool Set and Application of High-end CNC Machine Tool(Phase ?)High-end CNC machine tool modular design evaluation system,through the application of specific machine tool to verify the theoretical method of this paper.The thesis is divided into six chapters,the main contents are as follows:The first chapter introduces the domestic and foreign research status of related technologies such as individual needs analysis and conversion,product modular design,product module design evaluation and other related technologies,expounds the background and significance of the research,and gives the main research content and organizational framework.The second chapter presents the customer personalized demand analysis based on Kano model and QFD-based demand conversion method.By analyzing the basic demand items and calculating the importance degree of demand,the fuzzy QFD method is used to map the individual needs of customers into the specific design parameters,and the individual requirements are adjusted to the importance of the design parameters OK.The third chapter presents a robust modular design method based on fuzzy tree graph.The function and structure of the product parts are analyzed through the correlation degree criterion,and the solution of the product module division problem is realized by fuzzy tree diagram method.The degree of relevancy that characterizes the module partition and the functional contribution that characterizes the individual needs of the customer are taken as the objective function of optimization.The non-dominated genetic algorithm is used to optimize the result of module partitioning to realize the robustness analysis of product module partitioning scheme.In the fourth chapter,a method to evaluate the product modular design based on the minimum decision bias is proposed.Analyze of product design evaluation indicators and establish hierarchical evaluation model.In the process of decision making,designers'knowledge and experience are fully taken into account.The evaluation index weight distribution is transformed into the single-objective optimization problem with the smallest deviation from the individual customer demand and designer's preference decision.The program is calculated by calculating the distance between each design solution and the ideal solution Sort,to achieve the optimal design program evaluation.The fifth chapter introduces the evaluation system of modular design of high-end CNC machine tool developed based on the theory and method of this paper.The evaluation system is applied to the evaluation of the modular design of a machine tool,which verifies the feasibility of the theoretical method.The sixth chapter summarizes the main research work and achievements of this paper,and prospects the next work and research direction.