使用软件MATLAB6.5进行计算，并绘出凸轮行程、速度、加速度随时间的变化曲线。
The software MATLAB6.5 is used to calculate and draw the curves of travel, velocity and acceleration to time.
对于三缸低波动往复泵，理论上应使三个活塞在排出行程（吸入行程）中的速度之和为一常数，采用凸轮机构能达到这一目的。
Theoretically the sum of the velocities of the three pistons on the discharge stroke in a low-fluctuation triplex pump should be a constant, and this can be achieved by means of the cam mechanism.
提出了偏置式偏心圆凸轮机构从动件的行程、位移、速度、加速度的无量纲表达式，并对其进行分析。
The paper brings forward and analyzes the non-dimensional formulas of setover eccentric CAM from the aspects of the travel, displacement, speed and velocity of the moving parts.
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