摘要
在曲柄摇杆机构中，当以摇杆为原动件时，工作一个循环以后，直观看出有两次死点位置出现。利用机构广义坐标虚位移线性方程的雅可比矩阵求秩，证明处在死点位置时，其自由度 Ｗ ＝ ０。
In the crank and rocker mechanism, when the rocker acts as the driving link, there will be two dead points in one working cycle. In the present work, the Jacbi matrix of virtual displacement in the broad sense coordinates is employed to demonstrate that at the dead points the degree of freedom of the mechanism is zero.
关键词
平面机构
自由度
死点
曲柄摇杆机构
plane mechanism
degree of freedom
dead point
Jacbi matrix
