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How Non-Uniform Stiffness Affects the Propulsion Performance of a Biomimetic Robotic Fish
Changzhen Zheng1,2,3, Jiang Ding2, Bingbing Dong1,4
1School of Artificial Intelligence, Shenzhen Polytechnic, Shenzhen 518055, China.
Biomimetics (Basel, Switzerland)
|November 22, 2022
Summary
Biomimetic robotic fish propulsion improves by adjusting non-uniform stiffness ratios. Lower ratios enhance performance at low frequencies, while higher ratios are optimal for high frequencies.
Area of Science:
- Robotics
- Biomimetics
- Fluid Dynamics
Background:
- Fish exhibit diverse body stiffness, from flexible anguilliform swimmers (eels) to stiff thunniform swimmers (swordfish).
- Optimizing stiffness in biomimetic robotic fish is crucial for efficient propulsion.
Purpose of the Study:
- To experimentally investigate how non-uniform stiffness affects biomimetic robotic fish propulsion.
- To determine optimal stiffness ratios for varying locomotor parameters.
Main Methods:
- Development of a custom experimental platform for adjustable stiffness, frequency, and amplitude.
- Conducting extensive experiments to measure propulsion performance under different conditions.
Main Results:
- Propulsion performance is maximized when the non-uniform stiffness ratio adapts to locomotor parameters.
- Reduced stiffness ratios benefit low-frequency swimming.
- Increased stiffness ratios enhance high-frequency swimming.
Conclusions:
- Adaptive non-uniform stiffness is key to improving biomimetic robotic fish performance.
- Findings inform the design of more efficient underwater robots.
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