The function of UG software as an example of air passage design for the car air-conditioning was mainly introduced,including the function of dummy assemble,the one of intervene/clearance check,the analysis of CAE hydrodynamics,the analysis of man-machine engineering,and the function of dummy praxis etc,giving prominence to the advantage of UG software in air passage design for the car air-co.

Movement simulation and dynamic interference detection of poweredsupport based on virtual prototyping technology;

By means of the basic theory and the special demand of designing the electrode and using the relation of the interference in geometry,a new theory of the interference detection is introduced through some examples,by which the special touching state of the produce and the electrode can be gotten precision.

Based on the virtual prototyping technology, the rules and contents of interference detection of powered support are discussed.

Through establishing the three dimensional digital model,assembly and interference inspection,the hidden danger before the assembly processing is eliminated.

Methods of interference checking in NC programming are briefly discussed.

The new algorithms are accordingly designed on the basis of interference checking in order to implement the new strategy.

A sampling algorithm based on a convex hull and adaptive discretization is given, which makes possible the selection of sampling points to adapt to the geometrical features of the curved surface during interference check.

In addition,the interference between parts is removed with the interference check function of I-DEAS.

The structure of VASS and main key technology are introduced, including assembly modeling, sequence planning, the presentation of assembly\disassembly move, and interference checking.