Research On Data-driven Design Method For Product Morphological Concept Generation

With the rapid development of computer-aided design and manufacturing technology,the continuous innovation of design methods,design tools,and production modes has made design methods diversified.Advanced intelligent design technology can help companies quickly respond to consumer needs and improve product form innovation design efficiency.With the development of information age,information data represented by internet goods and network reviews continue to emerge.How to use these information data for product form innovation design has become an important issue in academic research.In order to realize the efficient,intuitive and accurate generation of product forms,this research starts from the stages of data acquisition,conceptual design,and detailed design.With the using of the product form dynamic theory to analyze the dynamic factors that affect the product form,combined with product meta symbol theory,shape blending algorithm and the parametric scripting technology,a data-driven product form concept generation design method was proposed.The research content includes the following four parts:Part Ⅰ: In the design analysis stage,the power factors that affect the product form were analyzed comprehensively from the perspective of product form power at first,and the types of power factors were divided and characterized.After the research object was determined,the scanning equipment and experimental capture were used to characterize the morphological dynamic factors then.The data that affect the product morphology was obtained,and the foundation for subsequent data-driven generation of conceptual morphology was laid finally.Part Ⅱ: In the data processing stage,the meta symbol theory was introduced to refine and describe the morphological characteristics of product samples.First,twodimensional software was used to process the sample,so as to obtain the twodimensional sketch morphological features that conform to the user’s comprehensive abstract dynamic factors.Then,the meta symbol relationship algorithm was established,and the meta symbol operations were performed on the two-dimensional morphological features.Finally,the object element calculation resulting multi-target morphological mixing was performed,and a set of sketches with different morphological characteristics were obtained for the subsequent drive generation of three-dimensional morphology.Part Ⅲ: The directed morphological graph(DMG)was constructed.First,the general process of form construction was summarized.Then the relevant product form was analyzed and the product directed morphological graph was constructed to assist designers in the data-driven product form conceptual design.Finally,the algorithm interpretation and knowledge transfer were further clarified such as data flow and logical structure in algorithm programming through the communication between designers and engineers.Part Ⅳ: The algorithm programming and product form generation were established.First,the sketch shape feature data and the user’s personalized scan data were imported into the algorithm program,and the product form schemes were obtained by the program calculation.Then the grid algorithm optimization was performed on the generated form schemes for the designer to design and process.Finally,the form was analyzed based on engineering performance.The morphological parameters were adjusted again according to the analysis results,so as to obtain the morphological schemes meeting the engineering requirements.In this study,the bicycle helmet morphology design was taken as an example to verify the feasibility of the method proposed above.The results showed that the method of product form conceptual design driven by data can fusion data and algorithms with the help of computers,and consider a variety of design factors in the conceptual design stage,which is convenient for designers to explore form in an effective range,and is helpful to the converge and success of design schemes.The helmet conceptual form generated by this method has good ergonomics.The construction of the morphological logic program provides a medium for intuitive communication between designers and engineers,and provides a convenient and efficient way for engineering analysis to quickly adjust the form.Through the adjustment of program parameters,a variety of conceptual design schemes can be quickly generated,which not only improves the design efficiency of designers,but also provides new approach for users’ personalized customization.