Theoretical Modeling of a Bionic Arm with Elastomer Fiber as Artificial Muscle Controlled by Periodic Illumination

Changshen Du, Shuhong Dai, Qinglin Sun · MDPI AG · 2025

This study presents a theoretical model for a bionic arm using liquid crystal elastomer fibers as artificial muscles, controlled by light.

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Plain English summary

The paper develops a dynamic model for a bionic arm that uses liquid crystal elastomer (LCE) fibers as artificial muscles. These fibers can oscillate in response to periodic light, allowing for controlled movement. The study derives equations to describe the behavior of the arm and analyzes how different parameters affect its oscillation.

Why this matters

This research is significant as it enhances the understanding of how soft robotics can be improved using LCEs, which could lead to more effective bionic devices and medical applications. By providing a theoretical foundation, it paves the way for future experimental designs in soft robotics.

Key findings

  • A dynamic model of a bionic arm using LCE fibers is established.
  • The arm exhibits periodic oscillation controlled by light.
  • The stable oscillation period depends on the illumination period.
  • Resonance occurs when the illumination period matches the arm's natural period.
  • The study provides theoretical support for various applications in robotics and biomedical devices.

What's new

The paper presents a theoretical framework for using LCE fibers in bionic arms, which is less explored compared to experimental studies in soft robotics.

Limitations

The research is primarily theoretical and may require experimental validation to confirm the findings.

Commercial context

Theoretical models need further experimental validation before commercial applications can be realized.

Publication

Publisher
MDPI AG
Publication date
July 31, 2025
Research type
Paper
License
https://creativecommons.org/licenses/by/4.0/

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