Instant centre of rotation

（重定向自Instant Center）

Sketch 1: Instantaneous centre P of a moving plane

Sketch 4: Example relative centre of rotation. Two bodies in contact at C, one rotating about A and the other about B must have a relative centre of rotation somewhere along the line AB. Since the parts cannot interpenetrate the relative rotation centre must also be along the normal direction to the contact and through C. The only possible solution is if the relative centre is at D.

The instant centre of rotation, also called instantaneous velocity center, or also instantaneous centre or instant centre, is the point fixed to a body undergoing planar movement that has zero velocity at a particular instant of time. At this instant, the velocity vectors of the trajectories of other points in the body generate a circular field around this point which is identical to what is generated by a pure rotation.

单词	Instant Center
释义	Instant Center 英语例句库 The relationship between polhode and herpolhode of the instant center of a rigid body when it makes a plane paraller motion is presented. 给出了刚体在平面平行运动时，刚体瞬心的本体极迹与空间极迹间关系的一种证明方法. 英语百科 Instant centre of rotation （重定向自Instant Center） The instant centre of rotation, also called instantaneous velocity center, or also instantaneous centre or instant centre, is the point fixed to a body undergoing planar movement that has zero velocity at a particular instant of time. At this instant, the velocity vectors of the trajectories of other points in the body generate a circular field around this point which is identical to what is generated by a pure rotation.
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