Research On Conceptual Design Model Of Auto Body Interior Based On KBE

With the development of Knowledge Based on Engineering, new design method of intelligentized design by combining parameterization design and KBE together has been advanced, by which design efficiency will be heightened largely and product exploitation period will be shortened. It is the basic design idea advanced by this article that the Parameterization Design method basing on KBE. This parameterization design method can integrate all information that is related with product design. It contains design standard, related dimension, dimension restriction,related character and technics order. By this intelligentized CAD method,a repository about products could be established. Not only dimension driving and character driving could be realized,but also checkout could be done momentarily by man-machine conversation.Auto interior packaging is the key process in auto design. Based on every assembly type and vehicle performance, we can get auto interior dimension, driver and passenger's hand clearance and interior parts'location parameterization to meet vehicle performance and statute requirement. In order to get excellent vehicle packaging, we also need to balance the conflict between every vehicle performance. The process of automobile layout includes many empirical principle and general steps. Interior packaging takes a long time. If engineering designers can make use of parameterization design module to package auto interior, they can avoid heavy repeated workload.As a completed parameterization design software,CATIA V 5 has been applied in every field: aviation,mechanism and auto etc. Its KBE module has been developed in more and more design fields,but the application in auto body layout design is seldom.The target of this article is to develop the advantage about KBE module attached to CATIA V5 software platform more to achieve the optimization design in auto body so as to ease the task, be convenient to update the dimension repeatedly and save the work time for engineers. This article's study is main about binding the geometry character and dimension parameter together so that realize the automatically update about dimension parameter by substitution of geometry character. Apply CATIA V5 complete parameterization design to set up dimensions connection and dimension drive in order to give dimensions in auto interior packaging checkout and update. As for auto interior design, it is a repeated work to give modification of relevant dimension parameter and relevant geometry elements (line, plane and body). On account of the shortcomings for other software, it is inevitable to use CATIA V5 entirely.KBE is the main component in CATIA V5,it can express strong function of CATIA V5. CATIA link engineering design and product design, and it make KBE become an important tool. Users can check if the design process can meet technique requirement by defining character, formula and so on. CATIA V5 KBE is including a series of intelligentized software modules like KWA,KWE,PKT,BKT,PEO,PFD and PFO etc. CATIA V5 could denote"knowledge"by the form of parameter, formulas, rules, check, reports, design table, reactions and generative scripts. CATIA V5 basing on KBE could combine repository of knowledge in the development of products so that could make sure engineers follow the best design practice, development, steps of design as well as improve the efficiency of design.Currently, the hotspot of vehicle packaging is the man-machine relationship. Consequently, the vehicle packaging of ergonomics is the critical process of investigating the new modules. Packaging tools are necessary of the ergonomics in the conceptual design. Advanced packaging tools are a symbol of a company. This paper discussed the construction of a parametric model with CATIA V5. Based on the knowledge modules of CATIA V5, applying rule-based reasoning to drive the geometric model to develop packaging tools for multi-parameter, percentile vehicle of A and B class.Interior packaging is a complex system that include of conception, design, experiment and production. The paper discussed the relationship of interior packaging. The program of interior packaging should be simplified to a frame which is controlled by hard point dimensions. Make the hard points parametric. On the basis of KBE, model a parametric framework map of interior packaging. Drive the geometric model with E-Forms to achieve the auto update of interior packaging. Compare the hard point dimensions with a competitive model will direct the vehicle body design in the future. The method will improve the efficiency and quality.The parametric idea of KBE makes the design much more automated, reduces the iterations of design, shortens the design cycle, and reduces the cost of design; at the same time, CAD design is integrated experts'experience and knowledge. CAD design can be changed based on the user's requirements rapidly and automatically without manpower or with little manpower. This method can improve the quality of design. Consequently, the parametric idea KBE will be widely used.Hand reach is the important design tool of auto interior packaging. If we could make use of principle of parameterization driving to create templet library of hand reach by the function of CATIA V5 KBE module. In this way, in the future design it is convenient for engineer to choose hand reach with different percent and easy to design or check, not only efficiency could be improved but veracity could be increased.Parameterization Design based on KBE make design process become more automatic and reduce design frequency and cost,at the same time,CAD design with experts'knowledge and experience can make or change new design proposal automatically and quickly based on requirement. So,parameterization design based on KBE has widely application foreground in auto design area.