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Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
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Bioinspired cross-medium wall-climbing robot with high-performance adhesion and contact adaptability.

Haoran Liu1,2, Hongmiao Tian1, Zexi Zheng1

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This study introduces a novel wall-climbing robot (WCR) with hybrid tracks inspired by geckos and octopuses. These robots offer enhanced adhesion and adaptability across diverse surfaces and environments, overcoming previous limitations.

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Area of Science:

  • Robotics
  • Biomimetics
  • Materials Science

Background:

  • Wall-climbing robots (WCRs) are crucial for hazardous environments but face limitations in surface and environmental adaptability.
  • Existing WCRs often rely on specialized mechanisms, restricting their universal application.

Purpose of the Study:

  • To develop a contact-adaptable, peeling-resistant, and cross-medium WCR.
  • To enhance WCR performance and application scope in complex environments.

Main Methods:

  • Integration of gecko- and octopus-inspired self-adaptive rigid-soft hybrid tracks.
  • Utilization of hollow mushroom-shaped adhesive microstructures (HMSAMSs) mimicking biological adhesion.
  • Mimicking biological mechanical decoupling and bone-muscle functions for enhanced track components.

Main Results:

  • HMSAMSs demonstrated superior adhesion forces and adhesion-to-preload ratios in both dry and underwater conditions.
  • The hybrid tracks exhibited enhanced contact adaptability, peeling resistance, and prevented interface crack propagation.
  • The WCR showed stable cross-medium performance and adaptability to diverse material surfaces.

Conclusions:

  • The developed WCR overcomes environmental and surface limitations of previous robots.
  • The biomimetic hybrid track design significantly enhances robot adhesion, adaptability, and durability.
  • This advancement accelerates the universal application of WCRs in challenging multimedia environments.