Journal
SCIENCE
Volume 349, Issue 6247, Pages 517-521Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aab1637
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Funding
- National Research Foundation of Korea [2013K000371, 2014048162, 2014023206, 2013R1A2A2A01006394]
- Defense Acquisition Program Administration [UD130070ID]
- Wyss Institute for Biologically Inspired Engineering
- National Research Foundation of Korea [2013R1A2A2A01006394] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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