Rotating an object in our hand is something that we do naturally without a whole lot of thinking. It is much more challenging to robots. This video from HKUST UC San Diego shows what it takes to build a robot hand that can rotate objects without vision.
This in-hand object rotation system uses “dense binary force sensors (touch or no touch) overlaying one side of the whole robot hand (palm, finger links, fingertips).” Its in-hand policy was trained using “Reinforcement Learning on diverse objects in simulation.” This video by Binghao Huang shows this robot in action.
[HT]