The pedal angle can be changed as desired by adjusting the length of the link rod.
调节连接杆的长度，踏板的倾斜角度可以自动地变化。
2
With the aid of the formula for the rotation of a vector and constraint equations for the connecting rod, the rotation Angle and the coordinates of path points of the connecting rod can be obtained.
应用矢量旋转公式及连杆运动约束方程，我们可以求得连杆转角及连杆曲线上点的坐标值。
3
To minimize this problem, Angle the floor Tom slightly by lowering the triangular height rod (the one nearest the drummer) to taste; see Figure 2. This causes the waves to scatter somewhat.