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Updated: Nov 4, 2025

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

Electronics-free pneumatic circuits for controlling soft-legged robots.

Dylan Drotman¹, Saurabh Jadhav¹, David Sharp¹

¹Department of Mechanical Engineering, University of California, San Diego, La Jolla, CA 92093, USA.

Science Robotics

|May 27, 2021

Summary

This summary is machine-generated.

This study introduces electronics-free pneumatic control for soft robots, enabling autonomous locomotion using simple air circuits. This innovation paves the way for low-cost, adaptable robots in diverse environments.

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Area of Science:

Robotics
Soft Robotics
Pneumatic Control Systems

Background:

Soft robots offer environmental adaptability but traditionally rely on bulky, expensive electromechanical components for control.
Existing control methods limit the practicality and cost-effectiveness of soft robotic systems.

Purpose of the Study:

To develop an electronics-free pneumatic control approach for soft-legged robots.
To demonstrate autonomous locomotion and gait control using only pneumatic circuits.
To advance the development of low-cost, adaptable soft robots.

Main Methods:

Designed pneumatic control circuits utilizing soft valves and pneumatic logic components.
Implemented ring oscillators composed of soft valves to generate oscillating signals for gait control.
Integrated pneumatic memory elements for gait selection and sensor-based responses.

Main Results:

Achieved controlled walking gaits for a soft-legged quadruped using minimal pneumatic components.
Enhanced locomotion speed by 270% with two oscillator circuits (seven valves).
Demonstrated omnidirectional locomotion and sensor-responsive gait selection using a novel pneumatic switch.

Conclusions:

This approach enables fully autonomous, electronics-free locomotion in soft robots.
The developed pneumatic control systems are cost-effective and suitable for environments unsuitable for electronics.
Represents a significant step towards practical applications of soft robotics in entertainment and specialized environments.