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首页> 外文期刊>Journal of Computing and Information Science in Engineering >A Methodology For Building Up An Infrastructure Of Haptically Enhanced Computer-aided Design Systems
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A Methodology For Building Up An Infrastructure Of Haptically Enhanced Computer-aided Design Systems

机译：建立触觉增强的计算机辅助设计系统基础结构的方法

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This paper presents an infrastructure that integrates a haptic interface into a mainstream computer-aided design (CAD) system. A haptic interface, by providing force feedback in human-computer interaction, can improve the working efficiency of CAD/computer-aided manufacturing (CAM) systems in a unique way. The full potential of the haptic technology is best realized when it is integrated effectively into the product development environment and process. For large manufacturing companies this means integration into a commercial CAD system (Stewart, et al, 1997, "Direct Integration of Haptic User Interface in CAD Systems, " ASME Dyn. Syst. Control Div., 61, pp. 93-99). Mainstream CAD systems typically use constructive solid geometry (CSG) and boundary representation (B-Rep) format as their native format, while internally they automatically maintain triangulated meshes for graphics display and for numerical evaluation tasks such as surface-surface intersection. In this paper, we propose to render a point-based haptic force feedback by leveraging built-in functions of the CAD systems. The burden of collision detection and haptic rendering computation is alleviated by using bounding spheres and an OpenGL feedback buffer. The major contribution of this paper is that we developed a sound structure and methodology for haptic interaction with native CAD models inside mainstream CAD systems. We did so by analyzing CAD application models and by examining haptic rendering algorithms. The technique enables the user to directly touch and manipulate native 3D CAD models in mainstream CAD systems with force/touch feedback. It lays the foundation for future tasks such as direct CAD model modification, dynamic simulation, and virtual assembly with the aid of a haptic interface. Hence, by integrating a haptic interface directly with mainstream CAD systems, the powerful built-in functions of CAD systems can be leveraged and enhanced to realize more agile 3D CAD design and evaluation.
机译：本文提出了一种将触觉界面集成到主流计算机辅助设计（CAD）系统中的基础架构。触觉界面通过在人机交互中提供力反馈，可以以独特的方式提高CAD /计算机辅助制造（CAM）系统的工作效率。有效地将触觉技术集成到产品开发环境和过程中，才能充分发挥其潜力。对于大型制造公司，这意味着集成到商业CAD系统中（Stewart等，1997，“ CAD系统中触觉用户界面的直接集成”，ASME Dyn。Syst。Control Div。，第61页，第93-99页）。主流CAD系统通常使用构造实体几何（CSG）和边界表示（B-Rep）格式作为其本机格式，而在内部，它们自动维护三角网格以用于图形显示和诸如曲面与曲面相交的数值评估任务。在本文中，我们建议利用CAD系统的内置功能来呈现基于点的触觉力反馈。通过使用边界球和OpenGL反馈缓冲区，可以减轻碰撞检测和触觉渲染计算的负担。本文的主要贡献在于，我们开发了一种健全的结构和方法，可与主流CAD系统中的本地CAD模型进行触觉交互。我们通过分析CAD应用程序模型并检查触觉渲染算法来做到这一点。该技术使用户能够通过力/触摸反馈直接触摸和操纵主流CAD系统中的本机3D CAD模型。它为将来的任务（例如直接CAD模型修改，动态仿真和借助触觉界面的虚拟装配）奠定了基础。因此，通过将触觉界面直接与主流CAD系统集成在一起，可以利用和增强CAD系统强大的内置功能，以实现更加敏捷的3D CAD设计和评估。

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