Ratcheting and tumbling motion of Vibrots
Ratcheting and tumbling motion of Vibrots
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DOI：
10.1088/1367-2630/18/12/123001
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发表时间：
2016-12-02
影响因子：
3.3
通讯作者：
Poeschel, Thorsten
中科院分区：
文献类型：
--
作者：
Scholz, Christian;D'Silva, Sean;Poeschel, Thorsten
颗粒转子系统（Vibrots），即通过摩擦冲击将线性振动运动转化为旋转的小型装置，具有科学意义，因为它们可以揭示各种类型的集体行为。观察一个孤立的振动点，我们注意到至少有两种不同的动力模式，这取决于振动驱动的参数。通过有限元模拟，我们揭示了这两种情况的驱动机制，可以相应地确定为棘轮和翻滚。两种模式之间的转换类似于某些弹跳球问题中的周期加倍，最终导致此类系统中的混沌运动。
Systems of granular rotors (Vibrots), that is, small devices that convert linear vibrational motion into rotation by frictional impact, are of scientific interest since they could reveal various types of collective behavior. Looking at an isolated Vibrot, we note at least two different dynamical modes, depending on the parameters of the vibrational driving. By means of finite element simulations, we reveal the driving mechanism for both cases which may be correspondingly identified as ratcheting and tumbling. The transition between both modes resembles period doubling in certain bouncing ball problems leading eventually to chaotic motion in such systems.