Research On The Key Technology Of Virtual Prototype Kinematics Analysis & System Realization

Virtual Prototype is a very important application of virtual reality technology in mechanical engineering field. It is a develop method of new product and offers a digital design method for computer simulation model. These digital models, virtual prototype, can make innovation design, test and evaluation to new product instead of physical prototype. Virtual Prototype technology can be independent of VR environment and also can combine with it. The virtual prototype constructs in this paper refers the latter.This paper introduces some key technology during the kinematics analysis of virtual prototype in VR environment, presents the recognition of motion link based on motion constrains, resolves the transformation from non-tree system to tree system, and realizes the kinematics analysis of the hydraulic press. The research results have been applied to practice.Chapter I The research status of virtual prototype technology is firstly introduced, then some key technologies during the research are elucidated, finally the research contents are expanded, with which followed a brief introduction to the dissertation's architecture.Chapter II Analyses the necessity of the transformation from non-tree system to tree system, introduces the mathematical description of the topological configuration of multibody system, defines the rules of joint cutting, and introduces the method of the transformation based on cutting joint.Chapter III The contrast of the motion link recognition based on motion constraint with the traditional method is made firstly, then expatiation of this method is made.Chapter IV Introduces the kinematics solution of the basic linkage, discusses the division method of the linkage group, introduces the kinematics solution of the gear system and combines these two methods to the synthesis of the mechanism motion.Chapter V resolves the problem met during the kinematics analysis of the hydraulic press, and gives the application example. In this example, the motion linkrecognition method is used and the result of the kinematics analysis is visualized. Finally, the function of the whole system is introduced.The remainder of this dissertation summarizes the research work and gives the future work of this research.