关键词: 虚拟现实, 虚拟装配, 装配语义, 约束导航

Abstract: In virtual assembly, interactive assembly operations based on geometric constraints didnt always completely accord with real assembly operations, which led to the stray from original design intentions and unnaturality and ineffectiveness of the operating process. Therefore, this paper put forward a virtual assembly method based on the level of assembly and the recognition of assembly semantics. It could enhance the recognition of assembly system from binding level to assembly task level through the generation, recognition, confirmation and calculation of assembly semantics. The application of this method in the virtual assembly of auto engine parts demonstrated that it could well capture the interactive intention operation process and enable users to assemble parts conveniently and accurately, thus improving assembly efficiency significantly.

Key words: virtual reality, virtual assembly, assembly semantics, constraint navigation