Jumping on water: Surface tension-dominated jumping of water striders and robotic insects
Jumping on water: Surface tension-dominated jumping of water striders and robotic insects
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DOI：
10.1126/science.aab1637
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发表时间：
2015-07-31
期刊：
影响因子：
56.9
通讯作者：
Cho, Kyu-Jin
中科院分区：
文献类型：
--
作者：
Koh, Je-Sung;Yang, Eunjin;Cho, Kyu-Jin
在水面上跳下的是一种独特的运动模式，在半节流节肢动物（例如水梯）中发现。为了在表面张力优势的跳跃机器人中重现这一壮举，我们阐明了所涉及的流体动力学，并将其应用于生物启发的冲动机制，从而最大程度地传递了动量转移到水中。我们发现，水横梁以相对较低的下降速度向内旋转弯曲的尖端，其力量低于打破水面所需的力（144毫米木/米）。我们建造了一个68毫克的尺度跳跃机器人昆虫，并证实了它在最大动量转移的情况下跳上水。结果表明，在跳水过程中，半乳头节肢动物使用的流体动力学现象有一种理解，并开了一种在人工系统中繁殖这些能力的方法。
Jumping on water is a unique locomotion mode found in semi-aquatic arthropods, such as water striders. To reproduce this feat in a surface tension-dominant jumping robot, we elucidated the hydrodynamics involved and applied them to develop a bio-inspired impulsive mechanism that maximizes momentum transfer to water. We found that water striders rotate the curved tips of their legs inward at a relatively low descending velocity with a force just below that required to break the water surface (144 millinewtons/meter). We built a 68-milligram at-scale jumping robotic insect and verified that it jumps on water with maximum momentum transfer. The results suggest an understanding of the hydrodynamic phenomena used by semi-aquatic arthropods during water jumping and prescribe a method for reproducing these capabilities in artificial systems.