Squid-inspired robots might have environmental, propulsion applications

Squid-inspired robots might have environmental, propulsion applications
Xiaobo Bi and Qiang Zhu discuss their work developing an aquatic robot inspired by cephalopods. (Left) Envisioned squid-inspired robot that combines fin flapping and jetting for locomotion. (Right) Numerical simulations provide insights of the underlying physical mechanisms. Credit: Qiang Zhu

Inspired by the unique and efficient swimming strategy of cephalopods, scientists developed an aquatic robot that mimics their form of propulsion.

These , squidlike robots are made of , which make them hard to detect—an advantage that has potential military reconnaissance and scientific applications—while maintaining a low environmental footprint.

Physicists Xiaobo Bi and Qiang Zhu used to illustrate the physical mechanisms and fluid mechanics of a squid's swimming method, which uses intermittent bursts through pulsed jet propulsion. By using this form of locomotion, the new can achieve impressive speeds, just like its animal inspiration. Bi and Zhu discuss their work in this week's Physics of Fluids.

When swimming, these squidlike machines suck water into a pressure chamber and then eject it. The soft-bodied device could be used as a platform for environmental monitoring by simultaneously using this feature to test water samples as it swims.

"In addition to the 2-D and 3-D numerical simulations presented in this article, we are working with an interdisciplinary team to build a prototype of the mechanical device, to perform both straight-line swimming and maneuvers," Zhu said. "This project will combine , control, smart materials and robotic design."

The device could be used as either a stand-alone swimmer or as a propeller of an underwater vehicle.

The researchers have not yet been able to maintain speeds that can last for more than a few cycles due to turbulence and instabilities, but they are working on ways to overcome this. Zhu hopes this research will provide a starting point for more sophisticated modeling and experimental studies to develop robots like their creation.


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More information: "Fluid-structure investigation of a squid-inspired swimmer," Physics of Fluids, DOI: 10.1063/1.5119243
Journal information: Physics of Fluids

Citation: Squid-inspired robots might have environmental, propulsion applications (2019, October 1) retrieved 14 October 2019 from https://phys.org/news/2019-10-squid-inspired-robots-environmental-propulsion-applications.html
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