The U.S. Defense Advanced Research Projects Agency (DARPA) kicked off the Subterranean Challenge in December 2017, with the goal of equipping future warfighters and first responders with tools to rapidly map, navigate, and search hazardous underground environments. The final winner of the four-event competition won’t be selected until 2021, but Team Explorer from Carnegie Mellon University and Oregon State University managed to best rivals for the initial prize.

On four occasions during the eight-day Tunnel Circuit event, which concluded today, each team deployed multiple robots into National Institute for Occupational Safety and Health research mines in South Park Township, Pennsylvania, tasked with autonomously navigating mud and water and communicating with each other and a base station for an hour at a time as they searched for objects. Team Explorer’s roughly 30 university faculty, students and staff members leveraged two ground robots and two drones to find 25 artifacts in its two best runs (14 more than any other team), they and managing to identify and locate a backpack within 20 centimeters of its actual position.

“Mobility was a big advantage for us,” said associate research professor in Carnegie Mellon’s Robotics Institute and co-leader of the team Sebastian Scherer in a statement. “The testing [prior to the event at Tour-Ed Mine in Tarentum, Pennsylvania] was brutal at the end, but it paid off in the end. We were prepared for this … We had big wheels and lots of power, and autonomy that just wouldn’t quit.”

Team Explorer — which has the backing of the Richard King Mellon Foundation, Schlumberger, Microsoft, Boeing, Flir Systems, Near Earth Autonomy, Epson, Lord, and Doodle Labs — is one of 11 teams competing for a portion of the Subterranean Challenge’s combined $4.5 million prize pool. Future events will involve an Urban Circuit, where robots will explore complex underground facilities, and a Cave Circuit, where the robots will operate in natural caves.

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“All the teams worked very hard to get here and each took a slightly different approach to the problem,” said system scientist at CMU’s Robotics Institute and co-leader of Team Explorer Matt Travers. “This was a great experience for all of us and we are proud of the performance by our team members and our robots.”

The Subterranean Challenge also includes the Virtual track, in which DARPA-funded and self-funded teams are developing software using models of systems, environments, and terrain to compete in simulation-based events and explore larger-scale runs. The winner will earn up to $1.5 million in the final event, with additional prizes of up to $500,000 for self-funded teams in each of four Virtual Circuit events.



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