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Asymmetries-induced nonlinear dynamic behaviors enable versatile modulation strategy for insect-scale robotics.

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This study presents a simple, single-actuator insect-scale robot with asymmetric design for versatile locomotion and complex maneuvers in unstructured environments. The robot demonstrates forward/backward movement, flipping, and landing capabilities, showcasing practical outdoor applications.

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Area of Science:

  • Robotics
  • Bio-inspired Engineering
  • Nonlinear Dynamics

Background:

  • Developing versatile insect-scale robots for unstructured environments is challenging.
  • Existing designs often lack adaptability and simplicity.
  • Need for robots capable of complex locomotion and environmental interaction.

Purpose of the Study:

  • Introduce a novel insect-scale robot driven by a single electromagnetic actuator.
  • Demonstrate versatile locomotion and response to challenging scenarios through asymmetric design.
  • Establish a nonlinear dynamic model for behavior modulation and design optimization.

Main Methods:

  • Integrating geometric and mass asymmetries into a deformable hexagonal frame.
  • Utilizing nonlinear dynamic behaviors induced by asymmetric configuration.
  • Developing a nonlinear dynamic model to map motion behaviors to input parameters.

Main Results:

  • Achieved complex actions: forward/backward locomotion, active flipping, and lateral movement.
  • Demonstrated response to challenging scenarios like granular media and safe landing via posture transitions.
  • Successfully constructed an untethered prototype for outdoor operation.

Conclusions:

  • The asymmetric design enables versatile locomotion and adaptability in insect-scale robots.
  • The nonlinear dynamic model aids in optimizing robot behavior and design.
  • The developed robot shows potential for practical applications in unstructured and outdoor environments.