Abstract

Optimal dimensional synthesis of path generating mechanism with one degree of freedom to move the tool on a prescribed filleted rectangular path encompassing larger dimensions is investigated. Synthesis of these mechanisms are done using hybrid optimization combining Genetic Algorithm and Pattern Search tools of MATLAB. Dimensional synthesis of mechanisms is carried out employing harmonic spacing of precision points along straight lines and arcs of desired profile paths. A novel mechanism model method is adopted to reconstruct path points on coupler path corresponding to uniformly incremented input crank angle value of the mechanism. Synthesized links and cam are used to trace the filleted rectangular profile path and compared with the desired profile path simulating the mechanism with the help of a CAD package. Results are discussed and suggestions are proposed for future work.

摘要

研究了具有一个自由度的路径生成机构的最佳尺寸合成，以在包含较大尺寸的指定圆角矩形路径上移动工具。这些机制的综合是通过结合遗传算法和 MATLAB 模式搜索工具的混合优化来完成的。机构的尺寸合成是利用沿所需轮廓路径的直线和圆弧的精密点的谐波间距来进行的。采用一种新颖的机构模型方法来重建耦合器路径上与机构的均匀递增输入曲柄角值相对应的路径点。合成的连杆和凸轮用于追踪圆角矩形轮廓路径，并与借助 CAD 软件包模拟机构的所需轮廓路径进行比较。