A Lesson from Plants: High-Speed Soft Robotic Actuators.

Autor: Baumgartner R; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Kogler A; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Stadlbauer JM; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria.; Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Foo CC; Institute of High Performance Computing ASTAR 1 Fusionopolis Way, #16-16 Connexis Singapore 138632 Singapore., Kaltseis R; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Baumgartner M; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria.; Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria.; Institute of Polymer Science Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Mao G; Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Keplinger C; Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USA.; Materials Science and Engineering Program University of Colorado Boulder Boulder CO 80303 USA., Koh SJA; Department of Mechanical Engineering National University of Singapore Singapore 117575 Singapore., Arnold N; Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Suo Z; John A Paulson School of Engineering and Applied Sciences Harvard University 29 Oxford Street Cambridge MA 02138 USA., Kaltenbrunner M; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria.; Soft Materials Lab Linz Institute of Technology LIT Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria., Bauer S; Soft Matter Physics Institute of Experimental Physics Johannes Kepler University Linz Altenberger Straße 69 Linz 4040 Austria.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2020 Jan 21; Vol. 7 (5), pp. 1903391. Date of Electronic Publication: 2020 Jan 21 (Print Publication: 2020).
DOI: 10.1002/advs.201903391
Abstrakt: Rapid energy-efficient movements are one of nature's greatest developments. Mechanisms like snap-buckling allow plants like the Venus flytrap to close the terminal lobes of their leaves at barely perceptible speed. Here, a soft balloon actuator is presented, which is inspired by such mechanical instabilities and creates safe, giant, and fast deformations. The basic design comprises two inflated elastomer membranes pneumatically coupled by a pressurized chamber of suitable volume. The high-speed actuation of a rubber balloon in a state close to the verge of mechanical instability is remotely triggered by a voltage-controlled dielectric elastomer membrane. This method spatially separates electrically active and passive parts, and thereby averts electrical breakdown resulting from the drastic thinning of an electroactive membrane during large expansion. Bistable operation with small and large volumes of the rubber balloon is demonstrated, achieving large volume changes of 1398% and a high-speed area change rate of 2600 cm 2 s -1 . The presented combination of fast response time with large deformation and safe handling are central aspects for a new generation of soft bio-inspired robots and can help pave the way for applications ranging from haptic displays to soft grippers and high-speed sorting machines.
Competing Interests: The authors declare no conflict of interest.
(© 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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