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Quan Xiong1, Xuanyi Zhou1, Dannuo Li1

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Summary
This summary is machine-generated.

This study introduces a novel variable stiffness robotic link (VSRL) using electrohydraulic jamming. This innovation enhances robotic safety and adaptability by allowing stiffness control without bulky components.

Keywords:
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Area of Science:

  • Robotics
  • Materials Science
  • Actuation Systems

Background:

  • Traditional rigid robotic links pose safety risks and lack adaptability.
  • Variable stiffness robotic links (VSRLs) offer enhanced safety and task versatility.
  • Hydraulically amplified self-healing electrostatic (HASEL) actuators are a promising technology for VSRLs.

Purpose of the Study:

  • To introduce and characterize a novel electrohydraulic jammed VSRL.
  • To demonstrate the VSRL's ability to vary stiffness significantly.
  • To explore the VSRL's potential in practical robotic applications.

Main Methods:

  • Utilized a strip-shaped HASEL actuator for electrohydraulic jamming.
  • Optimized VSRL design by adjusting liquid volume and sealing.
  • Integrated a self-sensing strategy leveraging the VSRL's capacitive properties.

Main Results:

  • Achieved stiffness variations up to 8.3 times through electrohydraulic jamming.
  • Demonstrated a lightweight, compact VSRL design without external pumps.
  • Validated effective load-bearing capabilities and significant stiffness variability.
  • Showcased multi-VSRL assemblies and a drone application for energy-efficient flight.

Conclusions:

  • The electrohydraulic jammed VSRL offers a safe, adaptable, and precise solution for robotics.
  • The technology has broad applicability in collaborative robots, wearable devices, and aerial systems.
  • This VSRL advancement promises improved functionality and safety in diverse real-world robotic applications.