Virtual assembly system based STEP and OSG
Virtual assembly system based STEP and OSG
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发表时间：
2013
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通讯作者：
Tan Tong-de
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作者：
Tan Tong-de
针对传统虚拟装配系统中涉及的装配灵活性和模型格式的限制，开发了虚拟装配系统，该系统以工业CAD中的STEP标准为基础，借鉴了开放源码的虚拟现实引擎OSG的技术特点，（OpenSceneGraph）该系统采用OSG组织产品模型的拓扑结构，采用NURBS方法表示STEP模型的几何形态信息，将STEP模型读入系统，通过模型的特征曲面和特征曲线的匹配实现装配，该系统的实现不仅提高了装配的灵活性，而且使工业CAD与虚拟现实系统无缝连接，相互接近，同时将OSG的应用范围从单纯的图形绘制扩展到虚拟装配生产领域，为虚拟装配和培训提供了有效的支持。
Focusing on the inflexibilities of assembling and restrictions of model format involved in traditional virtual assembling system,a virtual assembly system is developed,which is based on the STEP standard used in industrial CAD and refers to the technology character of the opensource virtual-reality engine OSG(OpenSceneGraph).In addition the key technology problems are solved and a primitive system is developed.The system organizes the topology of the product model with OSG,express the geometry morphology information of STEP model with the NURBS method,read STEP model into the system,fulfills the assemble by the matching of the model's feature surface and feature curve.The realization of the system not only enhances the flexibilities of assembling,but also make industrial CAD and virtual reality system connected without any gap and mutually approachable,at the same time extends the application range of OSG from solely graphics rendering to virtual assembling and producing field.The system provides valid support for virtual assembly and training.