【摘要】 介绍一种演示仪 ,在刚体转动瞬心位置装有绘画笔 ,当刚体转动时带动画笔画出空间极迹和本体极迹 ,而且能演示瞬心和极迹三者之间的动态关系更多还原

【Abstract】 A kind of demonstrator is introduced.It can draw the herpolhode and polhode by a drawing pen at instant center.The pen is driven by turning rigid body.It can demonstrate the dynamic relations of the instant center,herpolhode and polhode.更多还原