用计算机辅助几何技术对Stephenson六杆机构近似位姿的综合

机构尺寸综合的两个基本工具是几何法和解析法，适用于位置较少的机构尺寸综合，而且解析法求解复杂和不直观．提出计算机辅助几何技术的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，该方法不仅具有简洁直观、求解精度高和重复性好的特点，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．

Computer-Aided AD Geometry Approach of Approximate Dimensional Synthesis for Stephenson Six-bar Linkage

Two basic tools of dimensional synthesis are geometric construction and analytical calculation, but there are fewer available number of prescribed positions for dimensional synthesis, and analytical calculation is quite complicated and far from straightforward In the case of CAD geometric approach, for more than ten prescribed positions, first using the geometric constraints and dimension driving techniques, a primary 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 show that the mechanism simulation approach is not only fairly quick and straightforward, but also has the advantages of accuracy and repeatability