To analyse accelerations of points on plane figure generally the method of base point and the method of instantaneous acceleration center are used.

分析平面图形上点的加速度问题通常用基点法和瞬心法。

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Generally, base point method is used when we analyze the acceleration of a paint in the plane figure, we seldom use the instantaneous center method.

分析平面图形上点的加速度问题一般采用基点法，很少采用瞬心法。

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The characteristics of the acceleration of the instantaneous velocity center (IVC) were presented, and the trajectory equation for pure rolling of rigid body (PRORB) was developed.

分析了瞬心的加速度特性，建立了刚体平面纯滚动的轨迹方程。

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