Development Of The PTU Digital Design System For Intelligent4WD Vehicle

Digital design system is able to virtual design of advanced development system.Digital design system can be in auto parts which are the same shape but different size, orthe newly-designed is again research. Under the help of this system, development hasincrease development efficiency, saving development funds and shortens the developmentcycle role.Based on particular intelligent design knowledge of Power Transfer Unit (PTU),using3d software UG take second development system and the knowledge of VC++programming, innovative use of XML as information database, with ASP.NET,development out of the digital design system for the PTU in4WD vehicles.First of all, this paper studies the development of digital design system basic theory.Study the PTU work principle and design theory method; For parts involved in thedevelopment process of the entity modeling, studies the basic knowledge of parametricdesign, including the type of geometry model, parametric model in principle, etc.;According to the virtual assembly, expounds the assembly relation of virtual assembly andassembly relation of expression, and sums up the level of assembly model and assemblytree relationship figure, at the same time, analyzed the virtual assembly space andmovement; With theoretical knowledge, this paper introduces the structure of the digitaldesign system, give system implement frame diagram.Secondly, this paper studies the digital design system of parameterized modelingprocess control principle of the entity, it is concluded that the parametric design systemoperation process of the complete; Introduced in XML technology, and on the basis ofdetailed the automatic assembly constraints analytical information, developed a virtualautomatic assembly system; In view of the current3D drawing software in tolerance markinsufficiency of development have very strong the practical value of the2D drawingtolerance labeled cad system, and expounds the process of the module.Finally, the author comprehensive parameter design and virtual automatic assemblyobtain complete digital design system, and gives the specific parts of the process.