November 17, 2006—It may look like a metallic starfish, but scientists say this robot might have more in common with a newborn human.
The four-legged machine is a prototype "resilient robot" with
the ability to detect damage to itself and alter its walking style in
response.
Josh Bongard, an assistant professor of computer science at the
University of Vermont in Burlington, and his colleagues created the
robot as part of a NASA pilot project working on technology for the
next generation of planetary rovers.
While people and animals can easily compensate for injuries, even a small amount of damage can ground NASA machinery entirely.
"The main goal for this project was to try and build a robot
that was able to diagnose, or figure out, when it had been damaged, how
it had been damaged, and to recover from that damage," Bongard said in
a press statement.
According to Bongard, the machine knows that it is made with
nine parts. But the robot "doesn't know how the parts are put
together," Bongard said. "The robot doesn't know it's a four-legged
machine. That's something [it] initially figures out for itself."
By being "curious" and interacting with the environment, the
robot can create an internal model, or "body image," of itself, which
it then uses to simulate various walking gaits.
By repeating this process, the robot, when damaged, can quickly
detect the change in its body shape and simulate entirely new gaits
before choosing one to use in real life.
And a resemblance to the way a baby takes its first steps may
not be a coincidence. Even though the research team hasn't yet gone
over their results with biologists, Bongard said, this is what "could
be going on in the mind of a newborn baby or newborn animal."
The new robot is described in today's issue of the journal Science.
—Aalok Mehta
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