Underactuated fluidic control of a continuous multistable membrane

This work addresses the challenge of underactuated pattern generation in continuous multistable structures. The examined configuration is a slender membrane which can concurrently sustain two different equilibria states, separated by transition regions, and is actuated by a viscous fluid. We first d...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2020-03, Vol.117 (10), p.5217-5221
Main Authors: Peretz, Ofek, Mishra, Anand K., Shepherd, Robert F., Gat, Amir D.
Format: Article
Language:English
Subjects:
Inlet pressure
Membranes
Pattern generation
Physical Sciences
Viscous fluids
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Summary:This work addresses the challenge of underactuated pattern generation in continuous multistable structures. The examined configuration is a slender membrane which can concurrently sustain two different equilibria states, separated by transition regions, and is actuated by a viscous fluid. We first demonstrate the formation and motion of a single transition region and then sequencing of several such moving transition regions to achieve arbitrary patterns by controlling the inlet pressure of the actuating fluid. Finally, we show that nonuniform membrane properties, along with transient dynamics of the fluid, can be leveraged to directly snap through any segment of the membrane.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1919738117