Manta Rays Inspire the Fastest Swimming Soft Robot Yet
The Evolution of Aquatic Robotics
A team of researchers from North Carolina State University has set a new record for the fastest swimming soft robot, inspired by the graceful movements of manta rays. This innovative design showcases advancements in aquatic robotics, offering improved control and efficiency.
Breaking Previous Records
Jie Yin, the corresponding author of the study and an associate professor of mechanical and aerospace engineering at NC State, states, “Two years ago, we demonstrated an aquatic soft robot that was able to reach average speeds of 3.74 body lengths per second.” The team has significantly improved upon this record with their latest creation.
Enhanced Speeds and Capabilities
The new soft robot reaches impressive speeds of 6.8 body lengths per second. Unlike its predecessor, which could only swim on the surface, the new version can navigate through the entire water column—swimming both upward and downward.
Published Research
The team’s latest findings are documented in a recent paper published in the journal Science Advances. This publication highlights the innovative methods used in the design and mechanics of the robot.
Understanding the Robot’s Mechanics
The design of the soft robot features fins shaped like those of a manta ray, constructed from a stable material that maintains its form when the fins are extended. The robot’s flexible silicone body integrates a chamber that can be filled with air. By inflating this chamber, the fins bend similarly to how manta rays flap during their downstroke.
Energy Efficiency Through Innovation
Haitao Qing, a Ph.D. student and the first author of the study, explains, “Pumping air into the chamber introduces energy into the system. When the air is released, the fins revert to their stable position, allowing us to use just one actuator for the robot.” This setup enables quicker actuation and increased energy efficiency.
Fluid Dynamics Inspiration
The team’s research also delved into the fluid dynamics of manta rays, which was crucial for controlling the robot’s vertical motions. Co-author Jiacheng Guo stated, “We observed the swimming motion of manta rays and mimicked that behavior to guide the robot’s movements in the water.”
Advanced Control Techniques
By analyzing how manta rays produce jets of water to propel themselves, the researchers borrowed this idea to refine the robot’s movements. They noted that the downward jet produced by the robot was more powerful than the upward jet, allowing for nuanced control over its buoyancy and depth within the water column.
Demonstrating Robotic Functionality
The researchers successfully demonstrated the soft robot’s abilities in two distinct scenarios. One version of the robot was able to navigate through a challenging course filled with obstacles, while another version was shown to haul its own air and power source across the water’s surface.
Future Directions
Yin emphasized the balance between complexity and simplicity in the robot’s design: “This is a highly engineered design, but the fundamental concepts are relatively straightforward.” The team is now focused on enhancing lateral movements and exploring additional actuation methods to elevate the robot’s functionality.
Collaborative Research Efforts
The paper also includes contributions from several co-authors, including Yinding Chi and Yaoye Hong, former Ph.D. students at NC State, alongside Daniel Quinn and Haibo Dong from the University of Virginia.
Conclusion
With their innovative approach, the research team has not only pushed the boundaries of what soft robots can achieve but has also opened new avenues for future research and application in various fields, including underwater exploration and environmental monitoring.
More Information: Haitao Qing et al., Spontaneous snapping-induced jet flows for fast, maneuverable surface and underwater soft flapping swimmer, Science Advances (2024). DOI: 10.1126/sciadv.adq4222. www.science.org/doi/10.1126/sciadv.adq4222
FAQs
1. What inspired the design of the latest soft robot?
The design of the latest soft robot was inspired by the swimming motions of manta rays, allowing for improved movement and control in the water.
2. How fast can the new soft robot swim?
The new soft robot can swim at speeds of up to 6.8 body lengths per second, outperforming its predecessor.
3. What are the key features of the robot’s design?
The robot features fins shaped like manta rays and utilizes a flexible silicone body with an air chamber that allows for rapid fin movement and energy efficiency.
4. What are the future goals of the research team?
The research team aims to enhance the robot’s lateral movements and explore additional modes of actuation to expand its capabilities while maintaining a simple design.
5. Where can I find the full research paper?
The full research paper is published in Science Advances and can be accessed through this link.
This revised article is structured clearly with appropriate headings and subheadings, maintains key points from the original content, and is aimed at enhancing overall readability and engagement. It also concludes with a FAQ section to address common queries readers may have.
