A robotic hand can adjust its grip when it feels the object in its hold starting to slip out
at University College London and his colleagues have made a simple soft robotic hand that can prevent an object from slipping with only wrist motions.
They started out by making a human-like hand using a 3D-printed plastic skeleton and soft, moulded silicone material. To mimic the way human, they added 32 flexible pressure sensors to the robot’s palm and fingers. Finally, they connected the hand to a movable arm with a motor in the wrist, which made the wrist the only part of the device that could move. All the sensors were wired to a computer to collect readings.
To deal with slipping objects, they trained an AI software on sensor readings for both successful and failed pick-ups. The software learned to recognise when an object was beginning to slip out of grasp, and to then effect new wrist motions to prevent that from happening. When controlled by the AI, the hand successfully made this adjustment about 79 per cent of the time.
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