Stephenson六杆机构近似位姿的计算机辅助几何法  

CAD geometric approach of approximate dimensional synthesis for Stephenson six-bar linkage

作　　者：张艳华[1] 吴立勋[1] 杜秀菊[1] 

机构地区：[1]河北师范大学职技学院,石家庄050024

出　　处：《现代制造工程》2012年第3期37-41,共5页Modern Manufacturing Engineering

基　　金：河北省科技支撑计划资助项目(10215653);河北省教育厅自然科学研究资助项目(Z2011202);河北省教育厅课题资助项目(2009459);河北省教育厅自然科学研究资助项目(2011212)

摘　　要：机构尺寸综合的两个基本工具是几何法和解析法,它们只适用于位置较少的机构尺寸综合,而且解析法求解复杂不直观。提出基于CAD几何的Stephenson六杆机构近似位姿综合法。先用CAD的几何约束和尺寸驱动技术,在多个复合精确和近似位姿情况下,构造一个基本六杆模拟机构。再根据轨迹和运动综合的原则,由基本六杆模拟机构分别创造出轨迹和运动的近似位姿综合模拟机构。计算机模拟结果表明,这种方法不仅具有简捷直观、求解精度高和重复性好的优点,而且可以增加机构综合的规定位置个数,为机构的尺寸综合提供更有效的工具。Two basic tools of dimensional synthesis are geometric construction and analytical calculation, but there are fewer avail- able the number of prescribed positions for dimensional synthesis, and analytical calculation are quite complicated and far from straightforward. A novel CAD geometric approach of approximate dimensional synthesis for Stephenson six-bar linkage is presen- ted. In the case of more than ten prescribed positions, first using the geometric constraint and dimension driving techniques, a pri- mary simulation mechanism is created. After that, based on the different tasks of path and motion generation for the dimensional synthesis,the simulation mechanisms of approximate path and motion generator with Stephenson six-bar linkage are developed from the primary simulation mechanism. The results of computer simulation mechanism of approximation dimensional synthesis prove that the mechanism simulation approach has not only fairly quick and straightforward, but also advantages of accuracy and repeatability.

关 键 词：机构综合 计算机几何法 六杆机构 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TH122[自动化与计算机技术—计算机科学与技术]