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Machine learning

Modular Magnetic Navigation System for Actuating Surface Microwalkers

Strategic Insights

— 1 min read

Researchers at the City University of Hong Kong have developed a modular magnetic navigation system for actuating surface microwalkers, which has shown potential for designing magnetic actuation systems in clinical applications. The system utilizes a dual-sided layout, with the rotating magnet system and imaging system positioned on opposite sides of the sample module, reducing control complexity for target tracking in a dynamic field of view. The system has been tested to verify its performance in actuating both rolling and swarm motion of surface microwalkers, with promising results.

Key Takeaways:

  • The proposed modular magnetic navigation system has comparable actuation capabilities to existing systems, but with lower control complexity.
  • The system utilizes a dual-sided layout, with the rotating magnet system and imaging system positioned on opposite sides of the sample module.
  • The decoupled two-degree-of-freedom rotating platform enables the switching of multiple rotation fields, achieving dual-axis rotation control of the magnet.
  • Various rotating magnetic fields generated by the proposed system are modeled, and different motion modes of surface microwalkers driven by the system are analyzed.
  • Corresponding motion control strategies are provided for different motion modes.
  • The system has been tested to verify its performance in actuating both rolling and swarm motion of surface microwalkers.
  • The research concludes that the proposed system has potential for designing magnetic actuation systems in clinical applications.
  • The study is based on research by Dong Sun et al., published in IEEE Robotics and Automation Letters in 2025.

Statistics:

  • The system has been tested on various rotating magnetic fields, with results demonstrating its potential for designing magnetic actuation systems.
  • The system has comparable actuation capabilities to existing systems, but with lower control complexity.
  • The research was supported by the Hong Kong Research Grants Council, National Natural Science Foundation of China (NSFC), and Shenzhen Science and Technology Project.
  • The study is published in IEEE Robotics and Automation Letters, which is a peer-reviewed journal.
  • The research has been verified through experiments on actuating both rolling and swarm motion of surface microwalkers.

Sources:

  • Sun, D., et al. "A Modular Magnetic Navigation System for Actuating Surface Microwalkers." IEEE Robotics and Automation Letters, vol. 10, no. 8, 2025, pp. 7923-7930.
  • NewsRx LLC, "Studies from City University of Hong Kong in the Area of Robotics and Automation Reported (A Modular Magnetic Navigation System for Actuating Surface Microwalkers)," August 4, 2025.

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