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robots - Самое интересное в блогах

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Tiny RoboBee flies, swims, and launches itself out of water back into the air

Четверг, 26 Октября 2017 г. 20:12 (ссылка)


The millimeter-scale RoboBee can fly, dive into water, swim around, and then take off into the air again. At just 175 milligrams, it's 1,000 times lighter than any other aerial-to-aquatic robot. Designed at Harvard's microrobotics laboratory, the RoboBee is outfitted with four tiny "floaties" and a chamber that converts water into oxyhydrogen, fuel that combusts to propel the robot out of the water.


“The RoboBee represents a platform where forces are different than what we – at human scale – are used to experiencing,” says researcher Robert Wood. “While flying the robot feels as if it is treading water; while swimming it feels like it is surrounded by molasses. The force from surface tension feels like an impenetrable wall. These small robots give us the opportunity to explore these non-intuitive phenomena in a very rich way.”


From Harvard:



The gas increases the robot’s buoyancy, pushing the wings out of the water and the floaties stabilize the RoboBee on the water’s surface. From there, a tiny, novel sparker inside the chamber ignites the gas, propelling the RoboBee out of the water. The robot is designed to passively stabilize in air, so that it always lands on its feet.


“By modifying the vehicle design, we are now able to lift more than three times the payload of the previous RoboBee,” said (researcher Yufeng) Chen. “This additional payload capacity allowed us to carry the additional devices including the gas chamber, the electrolytic plates, sparker, and buoyant outriggers, bringing the total weight of the hybrid robot to 175 miligrams, about 90mg heavier than previous designs. We hope that our work investigating tradeoffs like weight and surface tension can inspire future multi-functional microrobots – ones that can move on complex terrains and perform a variety of tasks.”




"A biologically inspired, flapping-wing, hybrid aerial-aquatic microrobot" (ScienceRobotics)

http://feeds.boingboing.net/~r/boingboing/iBag/~3/WP2WEESQDns/tiny-robobee-flies-swims-and.html

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Syndaver: A $95K animatronic cadaver that's replacing med-school corpses

Среда, 18 Октября 2017 г. 20:12 (ссылка)



The Syndaver is a super-realistic robotic human corpse simulator with replaceable viscera that med students can dissect again and again, freeing them to use the donated bodies of people who willed their remains to science for med school pranks, like sneaking them into the alumni dinner in a tuxedo.
(more…)

http://feeds.boingboing.net/~r/boingboing/iBag/~3/pvdJbOxoDmg/med-school-pranks.html

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Skydiving robot to capture video of skydivers

Вторник, 03 Октября 2017 г. 20:23 (ссылка)


The Freefall Camera (FFC) is a robot that can be tossed out of a plane to autonomously track and capture video of skydivers doing tricks. At a predetermined altitude, the robot pops its steerable parachute and lands near specified GPS coordinates. The University of Nottingham researchers who developed the Freefall Camera presented their work at last week's International Conference on Intelligent Robots and Systems. From IEEE Spectrum:



Building a robot that can successfully control its position and terminal velocity relative to another falling object is not something that’s been done before. There are freefall cameras designed to work in microgravity, but that’s a much different challenge: this camera has to be able to maneuver in a 120 mph (190 km/h) stream of air, which is all about passive aerodynamics. To steer itself, the FFC uses four vertical ailerons to control yaw (and eventually horizontal position), along with a pair of retractable flaps that increase or decrease the robot’s drag to slow it down or speed it up. A GoPro does the recording while a CMUcam5 vision sensor tracks colored blobs to stay locked onto its subject...


The tests showed that the FCC could generally track a human within 0.25 meters vertically, and 12 degrees of the center of the camera’s field of view. Occasionally, the camera would get confused by backgrounds or bright lights, so the next incarnation of the system will use an infrared beacon for tracking instead.



https://youtu.be/HdKaFBA5X0Y

http://feeds.boingboing.net/~r/boingboing/iBag/~3/LHKOMz2awKY/skydiving-robot-to-capture-vid.html

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