 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| . |  |
. |
Robots That Act Like Rats
Davis CA (SPX) Feb 16, 2005 Robots that act like rat pups can tell us something about the behavior of both, according to UC Davis researchers. Sanjay Joshi, assistant professor of mechanical and aeronautical engineering, and associate professor of psychology Jeffrey Schank have recorded the behavior of rat pups and built rat-like robots with the same basic senses and motor skills to see how behavior can emerge from a simple set of rules. Seven to 10-day-old rat pups, blind and deaf, do not seem to do a whole lot. Videotaped in a rectangular arena in Schank's laboratory, they move about until they hit a wall, feel their way along the wall until their nose goes into a corner, then mostly stay put. Because their senses and responses are so limited, pups should be a good starting point for building robots that can do the same thing. Joshi's laboratory built foot-long robots with tapered snouts, about the same shape as a rat pup. The robots are ringed by sensors so that they "feel" when they bump into a wall or corner. They are programmed to stay in contact with objects they touch, as rats do. But when the robotic "rats" were put into a rectangular arena like that used for experiments with real rats, the robots showed a new behavior. They scuttled along the walls and repeatedly bumped into one corner, but favored one wall. Instead of stopping in a corner they kept going, circling the arena. "When we re-analyzed the animal data, we found that the animals were also favoring one wall over another as they bumped around in corners," Joshi said. "The robots showed us what to look for in animal studies." The wall-following or corner-sticking is emergent behavior, he said. That means it is not written into the computer code, but emerges as a result of the instructions the robot follows as it interacts with the environment at each instant. The team is also looking at the behavior that emerges when groups of robotic rats interact using different kinds of rules. This should show biologists what the rats may be doing. Understanding the biology of these simple systems might later inform the design of more sophisticated robots, Joshi said. Related Links UC Davis SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express
Carnegie Mellon, UDI To Provide Unmanned Ground Vehicles for US Marine Corps
Pittsburgh PA (SPX) Feb 14, 2005Carnegie Mellon University's National Robotics Engineering Consortium and United Defense Industries have been awarded a $26.4 million contract with the U.S. Department of Defense's Joint Program Office for Robotic Systems to design, develop and produce tactical unmanned ground vehicles (TUGV) for the U.S. Marine Corps. |
|
|
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2006 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA PortalReports are copyright European Space Agency. All NASA sourced material is public domain. Additionalcopyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement |
