Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging

Overview

This protocol details the measurement and characterization of 3D shape deformation in underwater flapping fins made from polydimethylsiloxane (PDMS). Understanding these deformations is crucial for enhancing the design and control of compliant flapping fins used in underwater vehicles.

Key Study Components

Area of Science

• Soft robotics
• Fluid dynamics
• Underwater vehicle design

Background

• Non-intrusive measurement of soft robotic fins is vital for design improvement.
• Existing tools in fluid dynamics can be adapted for solid materials.
• This method can validate computational models and study flexible materials.
• Applications extend to sensors and medical fields.

Purpose of Study

• To measure deformations of soft robotic fins accurately.
• To inform fin design and control for underwater vehicles.
• To validate fluid-structure interactions in soft robotic systems.

Methods Used

• Design and build a custom 3D printed mold of the fin shape.
• Set up a pulsed laser system in a rectangular glass water tank.
• Generate a planar light sheet intersecting the tank at 30 Hertz.
• Utilize planar laser induced fluorescence for measurements.

Main Results

• Successful measurement of 3D shape deformation in PDMS fins.
• Validation of the method for simultaneous measurements of solids and fluids.
• Insights gained for the design of soft robotic systems.
• Potential applications in various fields including medical technology.

Conclusions

• The method enhances understanding of compliant flapping fins.
• It provides a framework for future studies in soft robotics.
• Further research can expand applications to other flexible materials.

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