在某一瞬间，平面图形内速度等于0的点称为速度瞬心。
提出了求加速度瞬心的两种方法，即外接圆法和公式法。
Two methods of establishing acceleration instantaneous center place, namely, a round of outside connection method and a formula method are described.
给出了用三心定理求解其速度瞬心的递推关系及其应用实例。
For the convenience of its application, the paper gives the iteration relation for solving transient velocity center by the theorem of three centers.
提出了平面连杆机构速度瞬心转移速度(简称“瞬心速度”)求解的新方法。
A new method for finding the moving velocity of an instant center position (for short "instant center velocity") of planar linkages is studied.
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