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Development of a Wire-Driven Robotic Fish Based on Double Sine Mechanism.
Qian Yang1, Qixin Wang1, Zihao Cao1
1Shien-Ming Wu School of Intelligent Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou 510640, China.
Biomimetics (Basel, Switzerland)
|March 26, 2025
Summary
This study developed a high-frequency wire-driven robotic fish using a double-sine mechanism. Optimal swimming speed and turning performance depend on tail stiffness and swing frequency, with higher frequencies benefiting from stiffer tails.
Area of Science:
- Robotics
- Biomimetics
- Mechanical Engineering
Background:
- Wire-driven robotic fish mimic real fish locomotion.
- Limited research exists on high-frequency robotic fish systems.
- Tuna morphology inspires robotic fish design for enhanced performance.
Purpose of the Study:
- Develop a high-frequency wire-driven robotic fish.
- Investigate the impact of swing frequency and tail stiffness on swimming speed and turning.
- Advance the application of high-frequency mechanisms in bionic research.
Main Methods:
- Designed a wire-driven robotic fish with a double-sine mechanism.
- Modeled the fish body based on tuna morphology.
- Conducted experiments to test swimming speed and turning performance at various frequencies and tail stiffnesses.
Main Results:
- Swimming speed increases with frequency up to 4 Hz, then decreases.
- Lower tail stiffness is optimal at low frequencies; higher stiffness is better at high frequencies.
- Turning radius increases with higher frequencies and lower stiffness.
Conclusions:
- The double-sine mechanism supports high-frequency robotic fish movement.
- Tail stiffness is a critical factor for optimizing robotic fish performance across different frequencies.
- Findings provide insights for future bionic research and high-frequency robotic applications.
