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Variable Stiffness Electroadhesion and Compliant Electroadhesive Grippers.

Rui Chen1, Zhuo Zhang1, Jianglong Guo2

  • 1State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, China.

Soft Robotics
|December 10, 2021
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Summary
This summary is machine-generated.

This study introduces variable stiffness electroadhesion (VSEA) for robust soft adhesion. VSEA enhances gripping capabilities on diverse surfaces, overcoming limitations of traditional electroadhesion for soft robotics.

Keywords:
electroadhesionelectrostatic layer jammingshape lockingvariable stiffness

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Area of Science:

  • Robotics
  • Materials Science
  • Adhesion Science

Background:

  • Soft adhesion is crucial for material handling, especially on irregular surfaces.
  • Traditional soft electroadhesion (EA) faces challenges like contact peeling and limited lifting capacity.
  • Variable stiffness electroadhesion (VSEA) offers a potential solution to these limitations.

Purpose of the Study:

  • To develop a monolithic, electrically controllable Variable Stiffness Electroadhesion (VSEA) system.
  • To enhance the adhesion and gripping capabilities of soft electroadhesion technology.
  • To demonstrate the VSEA system's effectiveness in soft robotic applications.

Main Methods:

  • Integration of electrostatic layer jamming with soft electroadhesion into a single structure.
  • Development of a VSEA pad capable of rapid response and significant stiffness modulation.
  • Experimental evaluation of VSEA performance on various surface geometries and under peeling forces.

Main Results:

  • The VSEA pad exhibited a rapid response time (within 1 second) and a 2200% stiffness change.
  • It demonstrated over four times the resistance to peeling force for a 70g weight.
  • Adhesive forces increased by 24.2% on flat, 34.8% on convex, and 49.3% on concave surfaces.

Conclusions:

  • The developed VSEA technology effectively overcomes limitations of conventional soft electroadhesion.
  • VSEA shows significant improvements in adhesion strength, stiffness control, and adaptability to surface topography.
  • This VSEA solution is promising for integration into soft robotic systems, broadening electroadhesion applications.