Publication Date:
2015-08-01
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koh, Je-Sung -- Yang, Eunjin -- Jung, Gwang-Pil -- Jung, Sun-Pill -- Son, Jae Hak -- Lee, Sang-Im -- Jablonski, Piotr G -- Wood, Robert J -- Kim, Ho-Young -- Cho, Kyu-Jin -- New York, N.Y. -- Science. 2015 Jul 31;349(6247):517-21. doi: 10.1126/science.aab1637. Epub 2015 Jul 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA. hyk@snu.ac.kr kjcho@snu.ac.kr. ; Micro Fluid Mechanics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. hyk@snu.ac.kr kjcho@snu.ac.kr. ; Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw 00-679, Poland. ; School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA. ; Micro Fluid Mechanics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea. ; Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26228144" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Biomechanical Phenomena
;
Extremities/physiology
;
Heteroptera/*physiology
;
Hydrodynamics
;
*Locomotion
;
Robotics
;
Rotation
;
Surface Tension
;
*Water
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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