Tech

October 31, 2012

Army researchers link ground robots for collaborative autonomy

Jason Gregory and Jeffrey Twigg, both of U.S. Army Research Laboratory’s Computational and Information Sciences Directorate, use their robotics expertise to explore ways to best operate autonomous systems in complex and unstructured situations like those soldiers encounter on the battlefield.

Four U.S. Army Research Laboratory researchers have developed an algorithm that will make it easier for the Department of Defense to maintain wirelessly networked Army PackBots and other military assets using radio communications.

The team recently demonstrated they could map the region of good connectivity to a radio base station using received signal strength.

Jeffrey Twigg of U.S. Army Research Laboratory’s Computational and Information Sciences Directorate tests an Army PackBot’s connectivity to a radio base station using signal strength on Sept. 18 at the U.S. Army Research Laboratory in Adelphi, Md.

“We are working on fundamental techniques that employ autonomous agents to maintain connectivity, and continuously provide situational awareness to Soldiers,” said Dr. Brian Sadler of ARL’s Computational and Information Sciences Directorate in a recent article about the research.

The team has been focused on radio connectivity between robots for nearly two years, he said.

“We can find and explore areas that have high RSS and then map these areas as having the strongest connectivity to the radio base station,” said Jeffrey Twigg, a contract employee with ARL’s Computational and Information Sciences Directorate who was instrumental in this research. “This brings us a step closer to operating autonomous systems in complex and unstructured situations like those soldiers encounter on the battlefield.”

When the environment is open, communication between autonomous robots is well understood. Indoors however, walls and other sources of interference cause radio propagation to be more complex. This requires the communication strategies used by robotic systems to be more complex, Twigg said.

“Ultimately we want to form building blocks that increase the effectiveness of a networked team of robots in an unknown environment,” Twigg said. “If robots can be programmed to map where there is the potential to communicate inside a building, then Soldiers and other assets can know where in the building they will be able to communicate with a radio base station.”

Efficient Base Station Connectivity Region Discovery by Jeffrey Twigg, Dr. Jonathan Fink, Dr. Paul Yu and Dr. Brian Sadler is a project that takes a second step toward a broad understanding of solutions for Army robotics. The study has been submitted for publication by the International Journal of Robotics Research.

The researchers took their findings from earlier research conducted this year to the next level. They combined region decomposition and RSS sampling to form an efficient graph search. The nominal RSS in a sampling region is obtained by averaging local RSS samples to reduce the small scale fading variation.

At this point, the system has been tested in the lab as well as at the MOUT site at Fort Indiantown Gap.

The algorithm can be used for sensing and collaborative autonomy within the region of base station connectivity, Twigg said.
The ARL researchers first presented the development: RSS Gradient-Assisted Frontier Exploration and Radio Source Localization at the 2012 International Conference on Robotics and Automation in St. Paul, Minn.




All of this week's top headlines to your email every Friday.


 
 

 

Headlines December 22, 2014

News: Report: DOD bomb hunters pried into U.S. firms, citizens - During some of the bloodiest days of U.S. combat in Afghanistan and the roadside bomb threat there, the Pentagon’s Joint IED Defeat Organization “improperly collected” intelligence on U.S. citizens and corporations to try to stem the threat, a Pentagon Inspector General report has found.  ...
 
 

News Briefs December 22, 2014

U.K., Canadian military leaves to join Ebola fight Reservists and troops from Britain and Canada have left for Sierra Leone to help in the battle to contain the Ebola virus outbreak. British officials said Dec. 20 that 16 reservists and 100 regular military personnel left on a morning flight from the Brize Norton military airbase....
 
 
Boeing photograph

Boeing, Malaysia Airlines celebrate 100th 737 delivery

Boeing photograph Boeing and Malaysia Airlines celebrated the direct delivery of the airline’s 100th 737 aircraft at an event in Seattle. Shown here Aminuddin Zakaria, senior vice president, airline engineering group, Malaysi...
 

 

Navy helicopter crashes in Kuwait; all crewmembers ok

A U.S. Navy MH-60S helicopter assigned to Helicopter Sea Combat Squadron 26 (HSC 26) crashed at 11:22 a.m., EST, Dec.21, while on an overland training flight at Camp Buehring, Kuwait. All six personnel aboard the helicopter survived the crash and were transported to nearby medical facilities for evaluation. Three of the six crewmembers sustained minor...
 
 

AMC relocates KC-135 simulator

As Air Mobility Command fields the KC-46A Pegasus, displaced KC-135 Stratotanker pilot simulators will be relocated across the Total Force to maximize simulator access across the mobility enterprise. As a result, AMC, in coordination with the Air National Guard, recently identified four KC-135 pilot flight simulators and one KC-135 Boom Operator Weapons System Trainer to...
 
 

SpaceX completes first milestone for Commercial Crew Transportation System

NASA has approved the completion of SpaceX’s first milestone in the company’s path toward launching crews to the International Space Station from U.S. soil under a Commercial Crew Transportation Capability contract with the agency. During the Certification Baseline Review, SpaceX described its current design baseline including how the company plans to manufacture its Crew Dragon spacecraft...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>