Connect with us

Hi, what are you looking for?

CleanTechnica

Energy-Efficient, Hydrogen-Fueled Robot Can Swim Like a Jellyfish

 
Virginia Tech helps Navy develop an undersea robot that moves like a jellyfishBetween airborne drones, spycams that can see around walls and a flood of other new surveillance devices, it’s beginning to seem like the only place you can go for real privacy is deep-sea diving. Well, guess again. Researchers at Virginia Tech are working with the U.S. Navy to design Robojelly, a seagoing reconnaissance robot that looks like a jellyfish, “feeds” itself like a jellyfish and propels itself under water by pulsing, just like a jellyfish. As if there aren’t enough jellyfish in the sea already!

Harvesting energy from the environment

Robojelly is still in the initial stages of development so it still has a ways to go, but the finished concept is for a device that can supply its own energy through a reaction between oxygen and hydrogen in seawater, using platinum as a catalyst. The reaction creates enough energy in the form of heat to operate the robot’s propulsion system, without the need for batteries or any external fuel source.

Biomimicry and undersea propulsion

Robojelly’s movements have little of the stiffness usually associated with robotic movement. As described somewhat poetically by Alaska Dispatch reporter Doug O’Harra, “It oozes. It glides. It pulses to a waltz-like beat.”

Somewhat less poetically, the secret behind Robojelly’s natural-looking movement is the result of a type of actuator (an actuator is a motor that operates robotic systems) made from a “smart material” developed at Virginia Tech.

Smart materials are beginning to emerge as players in the world of energy efficient movement. They are capable of changing shape and springing back to their original form, typically when stimulated by a chemical reaction that creates heat.

Virginia Tech’s material is called Bio-Inspired Shape Memory Alloy Composite (BISMAC). According to the project’s research abstract published in the Institute of Physics’ Smart Materials and Structures journal, it consists of:

“…nano-platinum catalyst-coated multi-wall carbon nanotube sheets, wrapped on the surface of nickel–titanium shape memory alloy (SMA). As a mixture of oxygen and hydrogen gases makes contact with the platinum, the resulting exothermic reaction activates the nickel–titanium-based SMA. The sheets serve as a support for the platinum particles and enhance the heat transfer due to the high thermal conductivity between the composite and the SMA.”

This complicated set-up enables Robojelly to mimic the muscular contractions of a real jellyfish, which jet-propels itself by enclosing water within its bell-shaped body, then expelling it with force.

Given the Navy’s history of using dolphins for mine detection, the deployment of robotic jellyfish for military purposes is not all that far fetched. As for peacetime work, Robojelly could find itself detailed for environmental surveillance, monitoring and reporting on the condition of underwater equipment, and search-and-rescue operations.

License: Some rights reserved by NBphotostream.
Follow Tina Casey on Twitter: @TinaMCasey.

Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.

 
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Written By

Tina specializes in military and corporate sustainability, advanced technology, emerging materials, biofuels, and water and wastewater issues. Tina’s articles are reposted frequently on Reuters, Scientific American, and many other sites. Views expressed are her own. Follow her on Twitter @TinaMCasey and Google+.

Comments

#1 most loved electric vehicle, solar energy, and battery news & analysis site in the world.

 

Support our work today!

Advertisement

Power CleanTechnica: $3/Month

Tesla News Solar News EV News Data Reports

Advertisement

EV Sales Charts, Graphs, & Stats

Advertisement

Our Electric Car Driver Report

30 Electric Car Benefits

Tesla Model 3 Video

Renewable Energy 101 In Depth

solar power facts

Tesla News

EV Reviews

Home Efficiency

You May Also Like

Clean Transport

From the Electrovan to trucks, airplanes and locomotives, GM is finally having its hydrogen fuel cell moment, with an assist from the Army.

Batteries

The US Department of Defense is eyeballing energy efficient trucks and silicon EV batteries to cut down on climate-killing fossil fuels.

Autonomous Vehicles

Joe Biden will be the next president of the United States of America, and Kamala Harris will break through many barriers to become the...

Energy Efficiency

Tinker Air Force Base has a head start on the road to an energy efficient, carbon negative -- yes, carbon negative -- US Department...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.