三自由度并联机构坐标测量机及其虚拟原型研究

Study on the Theory and the Virtual Prototype of 3-DOF Parallel-Link CMM

介绍三自由度并联机构坐标测量机的结构、特点及工作原理 ,建立了该坐标测量机的测量模型 ,讨论了测量空间的计算方法 ,并对计算机仿真结果进行了分析。在 Windows95开发环境下 ,通过 Visual C+ + 5.0调用Open GL图形库中的函数 ,对并联坐标测量机的虚拟原型进行了参数化三维建模与仿真 ,从而为真实样机的制作奠定了基础。

Firstly, this paper describes the structure, measuring theory and characteristics of a new kind of coordinate measuring machine (CMM) using parallel-link mechanism with three spatial degrees of freedom (3-DOF). Then, the measuring model is established according to the theory of the spatial mechanics, and the workspace of the probe is calculated and verified by computer simulation. Finally, the virtual prototype of the new CMM is studied by using the graphics functions in OpenGL graphics library based on Windows 95 (Windows NT) and Visual C ++ 5 0. This research lays the foundation for manufacturing the real prototype of the parallel-link CMM.