Robust in-hand manipulation of variously sized and shaped objects

S Funabashi, A Schmitz, T Sato… - 2015 IEEE/RSJ …, 2015 - ieeexplore.ieee.org
2015 IEEE/RSJ International Conference on Intelligent Robots and …, 2015ieeexplore.ieee.org
Moving objects within the hand is challenging, especially if the objects are of various shape
and size. In this paper we use machine learning to learn in-hand manipulation of such
various sized and shaped objects. The TWENDY-ONE hand is used, which has various
properties that makes it well suited for in-hand manipulation: a high number of actuated
joints, passive degrees of freedom and soft skin, six-axis force/torque (F/T) sensors in each
fingertip, and distributed tactile sensors in the skin. A dataglove is used to gather training …
Moving objects within the hand is challenging, especially if the objects are of various shape and size. In this paper we use machine learning to learn in-hand manipulation of such various sized and shaped objects. The TWENDY-ONE hand is used, which has various properties that makes it well suited for in-hand manipulation: a high number of actuated joints, passive degrees of freedom and soft skin, six-axis force/torque (F/T) sensors in each fingertip, and distributed tactile sensors in the skin. A dataglove is used to gather training samples for teaching the required behavior. The object size information is extracted from the initial grasping posture. After training a neural network, the robot is able to manipulate objects of untrained sizes and shape. The results show the importance of size and tactile information. Compared to interpolation control, the adaptability for the initial posture gap could be greatly extended. Final results show that with deep learning the number of required training sets can be drastically reduced.
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