Unmanned ground vehicles (UGVs) are invaluable assets for soldiers in Iraq and Afghanistan, with more than 12,000 deployed. But mobility is still an issue, especially in urban environments where a small box on tracks can have difficulty negotiating stairs, curbs and fences. This is prompting researchers to find innovative ways of increasing mobility. iRobot Corp. made a start with the addition of detachable flippers on its PackBot robots. Known as “track articulations,” these add 8 in. ...


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