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This content will become publicly available on October 16, 2019

Title: Digital logic for soft devices

Although soft devices (grippers, actuators, and elementary robots) are rapidly becoming an integral part of the broad field of robotics, autonomy for completely soft devices has only begun to be developed. Adaptation of conventional systems of control to soft devices requires hard valves and electronic controls. This paper describes completely soft pneumatic digital logic gates having a physical scale appropriate for use with current (macroscopic) soft actuators. Each digital logic gate utilizes a single bistable valve—the pneumatic equivalent of a Schmitt trigger—which relies on the snap-through instability of a hemispherical membrane to kink internal tubes and operates with binary high/low input and output pressures. Soft, pneumatic NOT, AND, and OR digital logic gates—which generate known pneumatic outputs as a function of one, or multiple, pneumatic inputs—allow fabrication of digital logic circuits for a set–reset latch, two-bit shift register, leading-edge detector, digital-to-analog converter (DAC), and toggle switch. The DAC and toggle switch, in turn, can control and power a soft actuator (demonstrated using a pneu-net gripper). These macroscale soft digital logic gates are scalable to high volumes of airflow, do not consume power at steady state, and can be reconfigured to achieve multiple functionalities from a single design (including configurations thatmore » receive inputs from the environment and from human users). This work represents a step toward a strategy to develop autonomous control—one not involving an electronic interface or hard components—for soft devices.« less
Authors:
ORCiD logo ; ; ; ; ; ; ORCiD logo
Publication Date:
Grant/Contract Number:
ER45852
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 116 Journal Issue: 16; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
OSTI Identifier:
1503917

Preston, Daniel J., Rothemund, Philipp, Jiang, Haihui Joy, Nemitz, Markus P., Rawson, Jeff, Suo, Zhigang, and Whitesides, George M.. Digital logic for soft devices. United States: N. p., Web. doi:10.1073/pnas.1820672116.
Preston, Daniel J., Rothemund, Philipp, Jiang, Haihui Joy, Nemitz, Markus P., Rawson, Jeff, Suo, Zhigang, & Whitesides, George M.. Digital logic for soft devices. United States. doi:10.1073/pnas.1820672116.
Preston, Daniel J., Rothemund, Philipp, Jiang, Haihui Joy, Nemitz, Markus P., Rawson, Jeff, Suo, Zhigang, and Whitesides, George M.. 2019. "Digital logic for soft devices". United States. doi:10.1073/pnas.1820672116.
@article{osti_1503917,
title = {Digital logic for soft devices},
author = {Preston, Daniel J. and Rothemund, Philipp and Jiang, Haihui Joy and Nemitz, Markus P. and Rawson, Jeff and Suo, Zhigang and Whitesides, George M.},
abstractNote = {Although soft devices (grippers, actuators, and elementary robots) are rapidly becoming an integral part of the broad field of robotics, autonomy for completely soft devices has only begun to be developed. Adaptation of conventional systems of control to soft devices requires hard valves and electronic controls. This paper describes completely soft pneumatic digital logic gates having a physical scale appropriate for use with current (macroscopic) soft actuators. Each digital logic gate utilizes a single bistable valve—the pneumatic equivalent of a Schmitt trigger—which relies on the snap-through instability of a hemispherical membrane to kink internal tubes and operates with binary high/low input and output pressures. Soft, pneumatic NOT, AND, and OR digital logic gates—which generate known pneumatic outputs as a function of one, or multiple, pneumatic inputs—allow fabrication of digital logic circuits for a set–reset latch, two-bit shift register, leading-edge detector, digital-to-analog converter (DAC), and toggle switch. The DAC and toggle switch, in turn, can control and power a soft actuator (demonstrated using a pneu-net gripper). These macroscale soft digital logic gates are scalable to high volumes of airflow, do not consume power at steady state, and can be reconfigured to achieve multiple functionalities from a single design (including configurations that receive inputs from the environment and from human users). This work represents a step toward a strategy to develop autonomous control—one not involving an electronic interface or hard components—for soft devices.},
doi = {10.1073/pnas.1820672116},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 16,
volume = 116,
place = {United States},
year = {2019},
month = {3}
}

Works referenced in this record:

Pneumatic Networks for Soft Robotics that Actuate Rapidly
journal, January 2014
  • Mosadegh, Bobak; Polygerinos, Panagiotis; Keplinger, Christoph
  • Advanced Functional Materials, Vol. 24, Issue 15, p. 2163-2170
  • DOI: 10.1002/adfm.201303288

Continuous flow separations in microfluidic devices
journal, January 2007
  • Pamme, Nicole
  • Lab on a Chip, Vol. 7, Issue 12, p. 1644-1659
  • DOI: 10.1039/b712784g