By Cheryl Pellerin
American Forces Press Service
WASHINGTON, Dec. 12, 2013 – Next week, 17 teams will take
their multi-limbed, capable-looking robots through eight realistic
disaster-response tasks that will make up the Defense Advanced Research
Projects Agency’s Robotics Challenge Trials Dec. 21-22 at Florida’s
Homestead-Miami Speedway.
The best performers will determine the baseline for the
state of robotics, Dr. Gill Pratt, DARPA’s Robotics Challenge program manager,
said during a recent teleconference. And DARPA will fund up to eight of the
highest-scoring teams for another year as they move on to the DRC Finals in
2014, after which one team will receive a $2 million prize.
“The purpose of the program is to develop technology that
can help make us much more robust to natural and manmade disasters,” Pratt
explained.
“In particular,” he added, “we’re looking at robotic technology
that can allow us to mitigate the extent of a disaster during the first hours
and days while the disaster is still unfolding.”
DARPA was directly inspired to create the program by the
2011 accident at Japan’s Fukushima Daiichi nuclear power station, Pratt said,
which was caused when an earthquake and tsunami knocked out backup power
systems needed to cool the plant’s reactors, causing three of them to undergo
fuel melting, hydrogen explosions and radioactive releases.
“During the first 24 hours there,” he said, “if only human
beings had been able to go into the reactor buildings and vent built-up gas
that was accumulating inside the reactors, the explosions that occurred might
have been prevented and the disaster would not have been as severe.”
That’s just one example, Pratt added.
“We don’t know what the next disaster will be, so the
technology we’re trying to develop [will] allow human beings and robots working
together to have an effect on evolving disasters in environments that are too
dangerous for human beings to go into by themselves,” he said.
DARPA is trying to improve robotic mobility and dexterity to
achieve the following goals for disaster-response robots, Pratt said:
-- The robots have to work in environments that are
engineered for people, including environments that are degraded by an evolving
disaster;
-- The robots have to be able to use human tools, everything
from screwdrivers to fire trucks that may be available in the disaster area;
and
-- The robots must have an improved human-to-robot
interface, to reduce the amount of training needed by personnel who are experts
in handling disasters but not necessarily in handling robots.
“We started the program with over 100 teams and had a first
event in June that was a virtual robotics challenge held in simulation,” Pratt
said. Since then and through several design reviews, DARPA has narrowed the
field to 17.
DARPA is funding 13 of the 17 teams, and four teams are
funding their own work, the program manager said. Part of the funding includes
a high-mobility humanoid robot called Atlas. It’s funded by the Defense
Department and built by Boston Dynamics, an engineering company that began as a
spinoff of the Massachusetts Institute of Technology.
The teams represent five countries and organizations that
range from large and small businesses and hardware and software firms to
universities and government agencies like NASA, which has two teams
participating in the trials.
Each of the eight tasks the robots must perform has a couple
of steps. The first task is to drive a utility vehicle over a short course that
requires turning, then the robot must get out of the vehicle and walk, Pratt
said. Second is to travel over rough terrain that goes from easy to medium to
hard. Third is to move rubble from in front of a doorway and go through the
door.
The fourth task is to walk through three successively more
difficult-to-open doors. Fifth is to climb a ladder. Sixth is to go to a wall,
pick up a tool and use it to cut an access hole through the wall without
damaging infrastructure drawn on the wall. Seventh is to find three valves and
close them. Eighth is to pull a fire hose a short distance and connect it to a
standpipe.
The DARPA Robotics Challenge Trials are free and open to the
public -- a public whose experience with robots may tend toward science
fiction, Pratt worries, like the Terminator and R2D2, or lately even the Almost
Human MX-263 combat-model android. And what will the public see next week at
the Miami-Homestead Speedway?
Not all of the robots will be able to do every task, Pratt
explained. Even those that can do most tasks will be getting a lot of help from
their human operators. And the robots will be slow, he said.
“Right now, where we are is that robots are roughly at the
same level of mobility and dexterity as a one-year-old child,” Pratt said,
adding that each robot will have 30 minutes to do each of the eight tasks.
“What we’re doing with the DRC trials is we’re getting a
calibration point,” he said. “We’re trying to understand the state of the art
of the field.”
Today, Pratt said, real robots for the most part either work
in on stationary bases in factories doing very clearly defined repetitive tasks
or they are used in laboratories in schools in controlled environments. If
robots are used outdoors they’re typically run through something called
teleoperation, where a person dictates every move the robot makes each tenth of
a second or more.
“We’re trying to advance that technology and move things
from teleoperation to something known as task-level autonomy, where rather than
‘Move forward a tenth of an inch, move left a tenth of an inch,’ you tell the
robot, ‘Open that door,’ and the robot perceives the handle on the door,
reaches out, turns the handle and opens the door.”
Pratt said that’s the level of supervision he and others
believe will be most effective for people and disaster-response robots to use
to interact with each other.
Based on DARPA’s experience with its 2004 Grand Challenge
for driverless vehicles, the program manager said robots that qualify for the
2014 DARPA Robotic Challenge Finals in 2014 should be much more capable than
this year’s contenders.
“Let me paint a picture of where we hope we’ll get to,”
Pratt said.
Take the eight tasks from this year’s trials -- going
through doors, going up the ladder, moving rubble out of the way -- and imagine
mixing the tasks into a single rather mission the robot must complete, he said.
“Let’s say we have a site that is a mockup of a disaster and
… we give the robot a task: go rescue a person -- actually a dummy -- who’s
hidden under a pile of rocks,” Pratt said. “To get to the pile of rocks there
are ladders in the way, there are rubble fields, there are vehicles it can
use.”
The desire is to physically emulate such a scenario roughly
a year from now, and to have human beings in a remote location, able to control
the robot over a degraded communication link, he said.
Pratt said DARPA is also focusing beyond search and rescue
on operations that can help mediate disasters -- for example if there is a
chemical leak in a factory and the chemicals are too corrosive for people to
deal with.
“One possibility is putting people inside protective suits,
but that only works for a very short time until oxygen runs out or it gets too
hot,” he said. “A better idea is to separate the robot from the human being,
have the person in a safe place and, despite having a bad communication level,
allow the robot to do what a person in a suit would have done.”
Pratt added, “That’s our goal. How far we’ll get, we don’t
know. Part of the purpose of the trials is to calibrate us as to where the
field is now so we can design the finals to be a just-hard-enough test.”
No comments:
Post a Comment