Navigation Links
Robojelly gets an upgrade
Date:11/22/2011

Engineers at Virginia Polytechnic Institute and State University (VirginiaTech) have developed a robot that mimics the graceful motions of jellyfish so precisely that it has been named Robojelly. Developed for the Office of Naval Research in 2009, this vehicle was designed to conduct ocean underwater surveillance, enabling it potentially to detect chemical spills, monitor the presence of ships and submarines, and observe the migration of schools of fish.

Recently, a team at VirginiaTech has improved the performance of this silicone swimmer, enabling it to better overcome the limitations of its artificial skin and better mimic the true motion of a jellyfish. Details on this new design and how it might provide new insights into jellyfish propulsion mechanisms will be presented at the 2011 meeting of the American Physical Society's Division of Fluid Dynamics in Baltimore, Md., Nov. 20-22.

According to VirginiaTech mechanical engineer Alex Villanueva, Robojelly looks very similar to an actual jellyfish. "Its geometry is copied almost exactly from a moon jellyfish [Aurelia aurita]," he said. The robot is built out of silicone and uses shape memory alloy (SMA) actuators to swim.

To move through the water, the natural animal uses the bell section of its body, which deforms and contracts to provide thrust. The lower, or lagging, section of the bell is known as the flexible margin, and it deforms slightly later in the swimming process than the rest of the bell. Until recently, however, Robojelly lacked this crucial piece of anatomy in its design.

Villanueva and his colleagues tested a number of different designs for their robot, some with and without an analog to a flexible margin. Initially, the artificial materials used in construction presented a problem. Unlike their natural counterparts, the artificial materials tended to fold as they deformed, reducing Robojelly's performance.

After testing a number of designs and lengths for the folding margin, the engineers discovered that cutting slots into the bell reduced this unwanted folding effect.

This gave Robojelly a truer swimming stroke, as well as a big boost in speed.

"These results clearly demonstrate that the flap plays an important role in the propulsion mechanism of Robojelly and provides an anatomical understanding of natural jellyfish," said Villanuerva.

The talk, "Effects of a flexible margin on Robojelly vortex structures," is at 3:05 p.m. on Tuesday, Nov. 22, 2011, in Room 324. Abstract: http://absimage.aps.org/image/MWS_DFD11-2011-001706.pdf


'/>"/>
Contact: Charles Blue
cblue@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Related biology news :

1. Los Angeles World Airports Selects Unisys to Upgrade ID Card Reader System and Network
2. Athens Regional Medical Center Upgrades to Omnicell G4 Platform for Supply and Medication Management
3. Magnifying research: Scientists team together to upgrade supercomputer
4. Youku Upgrades Fingerprinting System for Tougher Copyright Protection Measures
5. Youku Upgrades Fingerprinting System for Tougher Copyright Protection Measures
6. $5 million NSF grant will upgrade and expand NJIT radio telescope array
7. Gender-bending fish problem in Colorado creek mitigated by treatment plant upgrade
8. Upgrade to advanced photon source announced by DOE
9. IEEE Launches Major Upgrade of IEEE Xplore(R) Digital Library
10. Commercial yeasts upgraded with an enzyme for biofuel production
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2017)... ALBANY, New York , April 19, 2017 /PRNewswire/ ... highly competitive, as its vendor landscape is marked by ... in the market is however held by five major ... and Safran. Together these companies accounted for nearly 61% ... majority of the leading companies in the global military ...
(Date:4/13/2017)... , April 13, 2017 UBM,s Advanced ... will feature emerging and evolving technology through ... Innovation Summits will run alongside the expo portion of ... sessions, panels and demonstrations focused on trending topics within ... advanced design and manufacturing event will take place June ...
(Date:4/11/2017)... DUBLIN , Apr. 11, 2017 Research ... Tracking Market 2017-2021" report to their offering. ... The global eye tracking market to grow at ... The report, Global Eye Tracking Market 2017-2021, has been prepared based ... report covers the market landscape and its growth prospects over the ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... MA (PRWEB) , ... June 22, 2017 , ... ... social media network RegMedNet has produced a Spotlight series ... featured scholarly reviews and perspectives by leading experts on the unique regulatory challenges ...
(Date:6/22/2017)... ... ... The first human cell line HeLa, established in 1951, has entered cell ... human cell lines with HeLa cells were published. Until recently, cross-contamination and misidentification of ... associated with dramatic consequences for research. , In this educational webinar, which is ...
(Date:6/22/2017)... ... June 22, 2017 , ... Charm Sciences, Inc. is pleased to announce that ... to be appropriate as a screening test at dairies and farms for raw commingled ... and the Charm EZ Lite system. These systems are a combination incubator and reader ...
(Date:6/20/2017)... ... June 20, 2017 , ... Biologist Dawn Maslar MS has found a biomarker ... Men Chase, Women Choose: The Neuroscience of Meeting, Dating, Losing Your Mind, and Finding ... men. ”The logical next step, in my estimation, was to scientifically track the evidence ...
Breaking Biology Technology: