Emergence of traveling waves in linear arrays of electromechanical oscillators
Emergence of traveling waves in linear arrays of electromechanical oscillators
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DOI：
10.1038/s42005-018-0086-4
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发表时间：
2018-11
影响因子：
5.5
通讯作者：
Yong Dou;Shashank Pandey;Charles A. Cartier;Olivia Miller;K. Bishop
中科院分区：
文献类型：
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作者：
Yong Dou;Shashank Pandey;Charles A. Cartier;Olivia Miller;K. Bishop
机械驱动的行波为自然系统和工程系统中的运动和运输提供了多种策略。这些有节奏的运动模式通常是由耦合振荡器系统（如跳动的纤毛或放电的神经元）协调的。在这里，我们表明，可以实现类似的运动内的线性阵列的导电颗粒，通过接触充电和静电致动周期之间的偏置电极振荡。粒子之间的排斥相互作用沿着其自然频率的空间梯度导致以振荡相位中的梯度为特征的锁相状态。这些行波的频率和波长可以通过改变所施加的电压和电极间隔来独立地指定。我们演示了如何行波同步可以使材料货物的定向运输。我们的研究结果表明，简单的能量输入可以协调复杂的运动与软机器人和胶体机器人的机会。
Traveling waves of mechanical actuation provide a versatile strategy for locomotion and transport in both natural and engineered systems across many scales. These rhythmic motor patterns are often orchestrated by systems of coupled oscillators such as beating cilia or firing neurons. Here, we show that similar motions can be realized within linear arrays of conductive particles that oscillate between biased electrodes through cycles of contact charging and electrostatic actuation. The repulsive interactions among the particles along with spatial gradients in their natural frequencies lead to phase-locked states characterized by gradients in the oscillation phase. The frequency and wavelength of these traveling waves can be specified independently by varying the applied voltage and the electrode separation. We demonstrate how traveling wave synchronization can enable the directed transport of material cargo. Our results suggest that simple energy inputs can coordinate complex motions with opportunities for soft robotics and colloidal machines.