Research Of Virtual Assembly Simulation Algorithm Based On UG

In the product manufacturing process, assembly automation lagging behind theproduct design and produce is the key factors that affect the product cost, the productdevelopment cycle and the product competitiveness. Virtual assembly, using digitalmodels instead the actual physical model to simulate the process of product assembly,is an effective way to solve the product assembly automation. Assembly modeling,collision detection and assembly planning are the main research content of virtualassembly, and real-time collision detection is a bottleneck in a complicated assemblymodel. The description methods of the geometric model influences directly theaccuracy and real-time of the collision detection. The precision of the model andCollision detection based on face-representation can’t satisfy the requirement in ahierarchy-assembly model, time consuming can’t be accepted with solid model ifusing the global interference check in CAD software.In order to solve the problem, distributed collision detection method base onCAD environment was provided in this article, then the realization and it applicationof this algorithm was studied. Main content of the research was as follows:Firstly, by comparing the performance of all kinds of bounding box, AABBbounding box was used to finish the bounding box collision detection of thecomponent couples and the construction method of the AABB bounding box tree andthe process of the collision detection algorithm was provided. The result showed thata large number of non-intersect objects were removed by using bounding boxcollision detection, then the component couples was reduced which need to accurateinterference inspection.Secondly, the task allocation method and the interference in UG assemblyenvironment were researched in the process of distributed collision detection and theuse of UDP realized the real-time interaction between the computers of the distributedsystem. The result of simulation showed that the algorithm could improve highlyreal-time interference check in addition to meet the accuracy requirement. Based onthe multi-tree hierarchy-assembly model, with distributed collision detectionalgorithm as a verification tool and using disassembly method to realize disassemblyplanning and disassembly simulation of the assembly model in the system, and thenthe disassembly sequence and disassembly path information was recorded through thelinked list structure, the reverse order of the disassembly sequence and disassembly path is assembly sequence and assembly path.Finally, the level information, the parts identification recognition and it spacepose of the assembly model was analyzed in the UG assembly environment, and theUG secondary development method based on the MFC was provided. On the basis, thedistributed virtual assembly system was built, and using the hydraulic support as amodel for instance simulation to verify the effectiveness of this system.