Based on the DLR Hand II, the German Aerospace Center (DLR) and the Harbin Institute of Technology (HIT) jointly developed the DLR/HIT Hand II as a medium-cost multisensory robotic hand. The DLR/HIT Hand II has five fingers, each with three actuators, that are identical except that one of them has an additional drive to make it work as an opposing thumb. To fully emulate human fingers' motor functions, each finger has four joints, not three, and each joint has force and position sensors. The DLR/HIT Hand II has a total of 15 degrees of freedom (DOF), compared to 13 in the original DLR Hand II. Fingers are equipped with slip-resistant gripper surfaces. Integration of drives and electronics within the hand itself is intended to make it easier to mount on a wide variety of robot arms.
(Source: German Aerospace Center (DLR))
GTOlover, mimic doesn't mean "reproduce exactly," at least not in robotics. I was a little surprised that a pinky--i.e., a short final finger--didn't make the grade, but only a little. One of the main goals to be traded off in most of these projects was cost, so five digits weren't usually necessary. You don't need a pinky--as per definition given above--to throw a football, although a fifth finger is helpful. To throw it like a pro player? Yeah, it's probably needed. But that's not what these bots are built for. Plus, the functioning of only four fingers can be vastly improved over the human grasping system, as mentioned in a few of the slide captions.
Given that the post is "Robotic Hands Mimic Humans" and humans have pinkies, it would be good to include this appendage. I am not sure you would call the pinkie useless as it adds an additional control, like throwing a football. Yes it can be done without a pinky, but is it as precise?
Seems a lot of good designs already exist in nature and we just need to copy them to mimic them.
Isn't that true, Chuck? Making robotic movements fluid is still something that engineers need to work on. I saw this recent story that was quite interesting...about a robotic arm that creates delicate art: http://www.fastcodesign.com/1671977/watch-delicate-art-made-with-a-massive-robotic-arm#1
Last week, I visited Worcester Polytechnic Institute's robotics department. WPI was the firs university in the nation to offer a BS degree in robotics. See my first of two reports in Students Design Robots.
This report looks at the over all program. Tomorrow's will look at a specific project.
Wal-Mart will hold its second Made in the USA Open Call July 7-8, at its headquarters in Bentonville, Ark. The event will be a repeat effort by the world’s biggest seller of consumer goods to increase the amount of US-made products it sells in Wal-Mart stores, in Sam’s Club members-only wholesale outlets, and on walmart.com.
This year, Design News is getting a head start on the Fourth of July celebration. In honor of our country and its legacy of engineering innovation -- in all of its forms -- we are taking you on an alphabetical tour through all 50 states to showcase interesting engineering breakthroughs and historically significant events.
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