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Mechanical Systems

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Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...

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Updated: Sep 11, 2025

Bioinspired Soft Robot with Incorporated Microelectrodes

Bioinspired Soft Robot with Incorporated Microelectrodes

Published on: February 28, 2020

Bio-inspired multimodal soft actuator with environmental self-adaptation.

Chi Chen¹, Zixiao Liu¹, Pengju Shi¹

¹Department of Material Science and Engineering, University of California, Los Angeles, CA, USA.

Nature Communications

|August 15, 2025

Summary

This summary is machine-generated.

This study presents a novel light-responsive soft actuator inspired by marine life. This adaptable robot self-switches between three motion modes, enhancing autonomy for changing environments.

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Last Updated: Sep 11, 2025

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Area of Science:

Robotics
Materials Science
Biomimicry

Background:

Autonomous soft robots offer self-sustained motion but lack adaptive multi-modal capabilities.
Current systems require human intervention for mode switching, limiting environmental responsiveness.

Purpose of the Study:

To develop a soft actuator with intrinsic multi-modal actuation and self-adaptation.
To mimic the adaptive locomotion strategies observed in Gymnura micrura.

Main Methods:

Engineered asymmetry and dynamic structure in a light-responsive soft actuator.
Integrated two distinct built-in feedback mechanisms governed by intrinsic bifurcation.
Demonstrated self-adaptation to varying light intensity, viscosity, temperature, and physical contact.

Main Results:

The soft actuator seamlessly switched between tracking, undulation, and oscillation motion modes.
Achieved self-adaptation to diverse environmental stimuli without external intervention.
Showcased potential applications in fluid dynamics, electronics, and environmental monitoring.

Conclusions:

This advancement in physical intelligence represents a significant step toward next-generation autonomous soft robotic systems.
The developed actuator exhibits unprecedented adaptive behaviors and higher-level autonomy.
Multimodal capabilities expand robotic applications beyond locomotion.