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Bipedal microwalkers actuated by oscillating magnetic fields.

Yuanzhe He¹, Shengwei Dong, Lefeng Wang

¹State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China.

|August 20, 2020

Summary

Researchers developed a human-walk-inspired bipedal microwalker. This submillimeter robot uses magnetic fields for controlled locomotion, enabling versatile movement on various surfaces and in microtubes.

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Area of Science:

Robotics
Biomedical Engineering
Materials Science

Background:

Microrobots show significant potential in biomedical and engineering fields.
Locomotion strategies for microscale devices are crucial for practical applications.

Purpose of the Study:

To design and demonstrate a bipedal microwalker inspired by human gait.
To control the standing and walking motion of the microwalker using external magnetic fields.

Main Methods:

Fabrication of a submillimeter, arrowhead-shaped microwalker.
Utilizing orthogonal electromagnetic coil pairs to generate oscillating magnetic fields.
Controlling locomotion parameters such as speed and direction via magnetic field manipulation.

Main Results:

The microwalker successfully demonstrated standing and walking locomotion.
Achieved walking speeds up to 2.2 mm/s on a glass substrate in water.
Exhibited controlled walking paths, ability to climb slopes, and movement within circular microtubes.

Conclusions:

The developed bipedal microwalker offers a novel approach to micro-robot locomotion.
This technology holds promise for fundamental robotic gait research and micromanipulation tasks.
The magnetic field control system provides precise regulation of micro-robot movement.