These Rubbery Robots Use Explosions to Jump

Posted by admin on Oct 13, 2014 at 8:34 am America/Chicago

Scientists recently demonstrated that a soft robot could crawl like a starfish through fire, over snow, and even after being run over by a car, all without the constraints of a tether. To control the bot, scientists used air pumps that force bursts of air in and out of a series of pneumatic channels running through its limbs. Air compressors are rather slow, taking on the order of seconds to work. So, rather than rely on compressed air, scientists have investigated the idea of using explosions to propel rubbery bots. Roboticist Michael Tolley at Harvard University and his colleagues now have revealed an untethered soft robot that uses internal combustion to jump. "I think this type of system might be useful for navigating rough terrain or unknown environments for things like search-and-rescue, or even space exploration," Tolley says. The three-legged silicone robot stands about 3 inches tall, 12 inches wide, and weighs a little more than a pound. It has an air pump that bends its legs to control the direction of its jumps and an explosion-driven piston in its center that propels it upward. Its round center holds the 9-volt battery for the air pump, liquid butane fuel for the piston, and electronics to provide the sparks for the explosions. Tolley's bot can jump nearly 2 feet horizontally or vertically. That leaping ability could allow it to cross uneven, expanding its range across uneven terrain and making the bot more useful for search-and-rescue operations. The device's squishiness makes it easier for it to land. And the use of butane fuel delivers power and flexibility. Check out more information at popularmechanics.com