A team of researchers from North Carolina State University has managed to break its own speed record with a soft robot inspired by manta rays . This new design exceeds the speed achieved by the previous model and improves its energy efficiency, opening up new possibilities for applications in the aquatic environment.
The soft robot design is efficient and flexible
The soft robot that set this new record features flexible fins that mimic the natural movement of manta rays, a design that has been optimized to improve speed and control in the water. The fins, which bend when air is inflated and return to their original position when the air is released, allow for rapid movement in the water, similar to the movement of marine rays.
[post_relacionado]Previously only able to swim on the surface, this robot can now move through the entire water column , controlling its ascent and descent with precision. The ability to swim both on the surface and in the depths of the water is one of the main improvements of this new model, making it a versatile and efficient device.
Improvements in speed and energy efficiency
The most notable advancement of this new design is the increase in swimming speed. The robot can now reach up to 6.8 body lengths per second , a significant improvement over the previous model’s 3.74 body lengths per second. This increase in speed has been achieved without sacrificing energy efficiency, a crucial factor for prolonged applications in aquatic environments.
Researchers have managed to optimize energy consumption by using a single actuator to control the fins. This simplified system reduces the need for multiple power sources, making the robot more efficient and faster when swimming, with significantly lower energy consumption.
The robot can navigate simple underwater obstacle courses. Source: Yin Lab@NCSU
Vertical movement and buoyancy control
One of the most innovative features of this soft robot is its ability to control vertical motion. Inspired by the fluid dynamics of manta rays, the robot can modify its vertical trajectory by manipulating its fin-beating speed and frequency . This technique allows the robot to ascend and descend within the water with precise control, opening up possibilities for missions in complex vertical environments.
The robot’s buoyancy is also controlled by compressed air filling the fins. As air is inflated, the robot becomes more buoyant, allowing it to maintain a stable position or move up or down with ease.
A promising future for aquatic robots
This breakthrough marks a major achievement in aquatic robotics . With its improved speed, ability to move at different depths, and efficient design, the soft robot has the potential to transform applications in a variety of fields , from marine research to rescue operations in aquatic environments.
The research team is now working on improving the robot’s lateral control and exploring new modes of actuation that could further increase its capabilities while maintaining the simplicity that characterizes its design.
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Source and photo: North Carolina State University