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Pattern architected soft magnetic actuation.

Dharmi Chand1, Sivakumar M Srinivasan1

  • 1Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras, Chennai, 600036, Tamil Nadu, India. drdharmichand@gmail.com.

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Researchers developed a new method to program complex shapes in soft magnetic actuators without molds. This technique architects particle patterns, enabling advanced shape-morphing and locomotion for applications in medicine and robotics.

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Area of Science:

  • Soft Robotics
  • Materials Science
  • Bioinspired Engineering

Background:

  • Soft magnetic actuators offer untethered control and infinite degrees of freedom for medicine, robotics, and engineering.
  • Current shape programming relies on molding, which limits complex shape creation.

Purpose of the Study:

  • To develop a novel shape programming technique for soft magnetic actuators.
  • To eliminate the need for molding by architecting particle patterns within the actuator matrix.

Main Methods:

  • Molding technique used to create basic actuator shapes and analyze particle alignment patterns.
  • Particle patterns architected using magnetic units in a soft matrix to mimic mold-programmed configurations.
  • Characterization of shape morphing and locomotion capabilities under external magnetic fields.

Main Results:

  • A new shape programming method was successfully demonstrated, eliminating the need for molds.
  • Actuators exhibited controlled shape morphing and locomotion capabilities.
  • A crawler actuator achieved a velocity of 3 mm/s under a 1 Hz magnetic field.

Conclusions:

  • Architecting particle patterns offers a versatile approach to programming complex shapes in soft magnetic actuators.
  • This mold-free technique enhances the capability for creating sophisticated actuator designs.
  • The developed actuators show rapid response to magnetic fields, enabling desired shape generation and movement.