Wednesday, February 09, 2011
Looks like this robotic hand is able to do almost anything that a human hand can do. The Tactile Robotic Hand is powered with Air Muscles which appear to be very strong and versatile.
“The Shadow Hand is the closest robot Hand to the human Hand available. It provides 24 movements, allowing a direct mapping from a human to the robot. The Shadow Hand has integrated sensing and position control, allowing precise control from off-board computers, or integration into your existing robot platform. The Shadow Hand contains an integrated bank of 40 Air Muscles which make it move. The muscles are compliant, which allows the Hand to be used around soft or fragile objects. The Shadow Hand can be fitted with touch sensing on the fingertips, offering sensitivity sufficient to detect a single small coin.
The Shadow Air Muscle is a simple yet powerful device for providing a pulling force. It behaves in a very similar way to a biological muscle. When actuated with a supply of compressed air, they contract by up to 40% of its original length. The force it provides decreases as it contracts, and the first few percent of the contraction is very powerful indeed. The simplest use of an Air Muscle is to move a lever. One muscle will pull the lever in one direction, and a spring can return it. Two muscles will allow the lever to be pulled in either direction, with considerable force. Because the muscle contracts over a known distance, it can be used to provide a safe movement: there is no need to ensure that the lever is not going to be rotated beyond its end-stop, because the muscle will only move the lever to its set up angle.”