Amplifying the response of soft actuators by harnessing snap-through instabilities

Amplifying the response of soft actuators by harnessing snap-through instabilities

Soft, inflatable segments are the active elements responsible for the actuation of soft machines and robots. Although current designs of fluidic actuators achieve motion with large amplitudes, they require large amounts of supplied volume, limiting their speed and compactness. To circumvent these li...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2015-09, Vol.112 (35), p.10863-10868
Hauptverfasser: Overvelde, Johannes T. B., Kloek, Tamara, D’haen, Jonas J. A., Bertoldi, Katia
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Robots
Systems design
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container_end_page 10868
container_issue 35
container_start_page 10863
container_title Proceedings of the National Academy of Sciences - PNAS
container_volume 112
creator Overvelde, Johannes T. B.
Kloek, Tamara
D’haen, Jonas J. A.
Bertoldi, Katia
description Soft, inflatable segments are the active elements responsible for the actuation of soft machines and robots. Although current designs of fluidic actuators achieve motion with large amplitudes, they require large amounts of supplied volume, limiting their speed and compactness. To circumvent these limitations, here we embrace instabilities and show that they can be exploited to amplify the response of the system. By combining experimental and numerical tools we design and construct fluidic actuators in which snap-through instabilities are harnessed to generate large motion, high forces, and fast actuation at constant volume. Our study opens avenues for the design of the next generation of soft actuators and robots in which small amounts of volume are sufficient to achieve significant ranges of motion.
doi_str_mv 10.1073/pnas.1504947112
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subjects Physical Sciences
Robots
Systems design
Volume
title Amplifying the response of soft actuators by harnessing snap-through instabilities
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