Hiển thị các bài đăng có nhãn robot. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn robot. Hiển thị tất cả bài đăng

Thứ Hai, 1 tháng 4, 2013

Giant robot jellyfish to patrol US coasts

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    Student team members from the Virginia Techâs National Science Foundation Center for Energy Harvesting Materials and Systems (CEHMS) test a 5-foot wide jellyfish-like robot under water at War Memorial Hall.Amanda Loman, Virginia Tech

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    Left to right, robotic jellyfish research team members Alex Villanueva of St-Jacques, New-Brunswick, Canada, and a doctoral student; and Kenneth Marut of Washington, D.C, and Tyler Michael of Lexington, N.C., both masters students, all in the mechanical engineering program.Amanda Loman, Virginia Tech

A man-sized robot jellyfish is patrolling U.S. coasts.

A Virginia Tech College of Engineering team has announced their successful testing of this new jellyfish robot. Weighing in at 170 pounds, the robot prototype called Cyro, is far larger than its predecessor.

In 2012, the team led by Professor Shashank Priya revealed RoboJelly, approximately the size of a real jellyfish. In less than a year, they have evolved from the size of a human hand to nearly 6 feet in length.

Cyro is the product of nationwide research funded by U.S. Naval Undersea Warfare Center and the Office of Naval Research. The $5 million research program includes other universities as well such as University of California Los Angeles, the University of Texas at Dallas and Stanford University.

UCLA’s research is developing underwater sensing and communication for the jellyfish robots based on electric fields. The goal is to create robots that are autonomous and self-powered to conduct surveillance. They could also be deployed to map ocean floors, study marine life and monitor the environment and ocean currents.

The larger the jellyfish robot, the more potential it has for greater endurance and operational range.

Jellyfish live in every ocean of the world, inhabiting both salt and fresh water, making it easier for a robot jellyfish to blend in and go undetected.

Cyro
Cyro has been built to replicate the jellyfish that also inspired its name, the cyanea capillata.

Compared to other marine life, jellyfish have a low metabolic rate and consume little energy, making them attractive as inspiration for robot design.

Researchers like those at the University of Gothenberg have been studying the North American comb jellyfish capable of silently approaching a target like a stealth submarine.

Different species of jellyfish inhabit a range from shallow coastal waters through to 4 or more miles below sea level and are capable of enduring an equally wide range of temperature.

The Nomura jellyfish can grow up to six feet long and weigh more than 600 pounds. With a thick layer of skin made of silicone that covers the “electronic guts,” Cyro looks very much like a real jellyfish.

Cyro is autonomous and can swim by itself like a real jellyfish. In order to swim, the robot jellyfish has electric motors that direct its arms and artificial jelly body.

The robot jellyfish does not have a nervous system. To move and execute missions it uses “a diffused nerve net.” While swimming, it can collect and analyze data at the same time. It can also relay the information back to humans.

The goal is for the robot jellyfish to operate for months on their own. Robojelly needed to be tethered to operate, but Cyro can run on its own powered by a rechargeable nickel metal hydride battery.

Next Phase
Both robots are in prototype phase and it will be several years before they could be deployed.

However, a new prototype model already is under construction and they’re looking at reducing power consumption and improving its ability to swim.

Ballet dancer turned defense specialist Allison Barrie has traveled around the world covering the military, terrorism, weapons advancements and life on the front line. You can reach her at wargames@foxnews.com or follow her on Twitter @Allison_Barrie.


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Thứ Năm, 21 tháng 2, 2013

Curiosity rover first robot to ever drill into Mars

NASA's Mars rover Curiosity has beamed home photos confirming that it recovered samples from deep within a Red Planet rock, cementing the robot's place in exploration history.

The Curiosity rover drilled 2.5 inches into a Martian outcrop on Feb. 8, and Wednesday mission scientists first set eyes on images showing drill tailings sitting in Curiosity's scoop, waiting to be transferred to analytical instruments on the robot's body.

The photos confirm that Curiosity has pulled off an historic achievement, scientists said.

"This is the first time any robot, fixed or mobile, has drilled into a rock to collect a sample on

"In fact, this is the first time any rover has drilled into a rock to collect a sample anywhere but on Earth," Jandura added. "In the five-decade history of the space age, this is indeed a rare event." [Curiosity's First Drilling on Mars (Photos)]

Breaking open a time capsule
Curiosity landed inside Mars' huge Gale Crater on the night of Aug. 5, kicking off a two-year prime mission to determine if the area has ever been capable of supporting microbial life.

Along with its 10 science instruments and 17 cameras, Curiosity's hammering drill is considered key to this quest, for it allows scientists to peer deep into Martian rocks for evidence of past habitability — something no other Red Planet robot has been able to do.

The arm-mounted drill "allows us to go beyond the surface layer of the rock, unlocking a kind of time capsule of evidence about the state of Mars going back three or four billion years," Jandura said.

The first drilling location is an intriguing time capsule indeed, scientists say. Curiosity bored into part of an outcrop called "John Klein," which is shot through with light-colored mineral veins and other evidence of long-ago exposure to liquid water.

"All of these features tell us that the rocks in this area have a really rich geological history, and they have the potential to give us information about multiple interactions between water and rock at this location," said JPL's Joel Hurowitz, sampling system scientist for Curiosity.

Mission scientists will learn more about that history when the drilled sample is transferred to two of Curiosity's key instruments, CheMin (short for Chemistry and Mineralogy) and SAM (Sample Analysis at Mars).

"That'll play out over the next few days here," said JPL's Daniel Limonadi, lead systems engineer for Curiosity's surface sampling and science system.

A few glitches
The recovered powder has already been used to clean out Curiosity's sample-handling system, to help ensure that the system is scrubbed free of potential contaminants from Earth. A minor software glitch has delayed the delivery of the sample to CheMin and SAM, but the team found a workaround, researchers said.

The Curiosity team has also become aware of another potential issue with the the sample-handling hardware. Engineers built two models of this hardware to run tests here on Earth, and the sieve — which screens out particles more than 0.006 inches (150 microns) wide — has begun to detach on one of them.

But this only happened after extensive use, and the sieve remained functional, rover team members said. And they stressed that there is no sign of any problem with the sample-handling gear Curiosity toted to Mars, though they'll take some measures to lessen the sieve's workload on the Red Planet (such as sieving samples for 20 minutes rather than 60 minutes, which Curiosity had done previously with soil samples).

"Based on the test results to date, and based on how we expect to use the hardware on Mars, we really have pretty good confidence that we're going to be able to use this hardware through the prime mission and beyond," Limonadi said.


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