面向虚拟环境的装配体模型研究

Research on Interaction Oriented Assembly model

人机交互是虚拟装配的本质特性和技术瓶颈 ,能反映交互过程的装配体模型构造 ,是虚拟装配领域的一个关键问题 给出一种时序的装配体模型 ,对时序的聚合关系、时序的约束关系以及时序的行为结构给出定义和分析 为实现该模型 ,还给出了零件的中间模型和对象复杂行为构造 ,同时对虚拟装配直接操作的交互过程、交互模式及装配工艺知识给出了时序的形式描述 ,这是连接人机交互与装配体模型以及模型与工艺生成的桥梁 一致的表示模型减少了交互装配信息的冗余性 ,有利于提高交互信息的复用 。

Human-computer interaction is an essential characteristic and a technical bottleneck of virtual assembly. The construction of an assembly model that can reflect the process of interaction is a critical problem in virtual assembly research area. In this paper, a temporal assembly model is put forward, and stringent definitions and analysis of temporal aggregation relationship, temporal constraint dependence relationship and temporal behavior segment are given. In order to realize this temporal model, an intermediate model of part and object complex behavior mechanism in virtual assembly are given, and at the same time, formal description of direct manipulation interaction process, interaction mode and assembly process knowledge is also given. These are bridges between interaction and assembly model and also between assembly model and assembly process output. Uniform express model can reduce redundancy of assembly information, increase reuse of interaction information, and is a new method of assembly process planning creation.