A Biomimetic Adhesive Disc for Robotic Adhesion Sliding Inspired by the Net-Winged Midge Larva

Area of Science:

• Biomimetics and Bio-inspired Robotics
• Fluid Dynamics and Adhesion Science
• Insect Morphology and Locomotion

Background:

• Net-winged midge larvae (Blephariceridae) exhibit exceptional adhesion to rocks in turbulent aquatic environments.
• Larval adhesion is facilitated by powerful ventral suckers capable of maintaining grip on slippery surfaces.

Purpose of the Study:

• To develop a theoretical model of a piston-driven sucker considering lubrication effects.
• To engineer a biomimetic robotic sucker inspired by net-winged midge larvae for adhesion-sliding mechanisms.
• To investigate the friction control and anisotropic properties of the biomimetic sucker.

Main Methods:

• Theoretical modeling of piston-driven suckers with lubricated contact areas.
• Fabrication and testing of a biomimetic sucker with a V-shaped notch.
• Development of robotic platforms (ASR-1 and ASR-2) utilizing the biomimetic suckers.

Main Results:

• The biomimetic sucker reversibly transitions between high (4.26 kPa) and low (0.41 kPa) friction states, achieving up to 93.9% frictional enhancement.
• The V-shaped notch induces frictional anisotropy, with a forward/backward force ratio of 0.81.
• Robotic platforms successfully navigated diverse substrates and turbulent currents (2.4 m/s).

Conclusions:

• The biomimetic adhesion-sliding mechanism, inspired by net-winged midge larvae, offers robust locomotion in challenging aerial and aquatic environments.
• This technology holds potential for developing advanced robots for long-term observation and monitoring.
• The study highlights the effectiveness of bio-inspired designs for robotic locomotion and adhesion.