铰链四杆机构的位置误差分析

Position error analysis of hinge four mechanism

运用全微分法建立机构位置方程组 ,求得机构位置误差方程 ,与平常的计算法相比 ,全微分法只需解一个线性方程组 ,就可确定机构的位置误差方程 ,方法简单、可行。在误差分析中 ,不仅找到了影响位置误差的主要因素 ,而且还利用机构误差分析图 ,对位置误差做了进一步的定性分析 ,为合理地确定构件的尺寸公差及原动件的位置公差 。

Position equations of mechanism are set up to obtain position error equation of mechanism by total differential method.Compared with usual method of calculation, total differential want merely to set up one system of equations, and may conclude position error equation of mechanism. It is simple and practicable. Main factors that have an effect on position error are found, and more analysis are done by making use of error analysis chart in error analysis. It can be reasonably referred to make sure size tolerance and position tolerance of driving member.