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A humanoid shoulder complex and the humeral pointing kinematics

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2 Author(s)
Lenarcic, J. ; Dept. of Automatics, Biocybernetics & Robotics, Jokf Stefan Inst., Ljubljana, Slovenia ; Stanisic, M.

This paper presents a humanoid robotic shoulder complex and the kinematics of humanoid humeral pointing as performed by this complex. The humanoid shoulder complex is composed of two subsystems, a parallel mechanism which serves as the innermost shoulder girdle and a serial mechanism which serves as the outermost spherical glenohumeral joint. These two subsystems are separated by an offset distance and a twist angle. The subsystems operate cooperatively as an offset double pointing system. Humanoid humeral pointing is defined as a configuration in which the displacement of the shoulder girdle and the humerus are coplanar, and in which a ratio between an inclination angle in each subsystem achieves a constant value consistent with human humeral pointing. One redundant degree of freedom remains in the humanoid shoulder girdle, and it can be used to optimize system configuration and operating criteria, such as avoiding the singular cones of the humanoid glenohumeral joint.

Published in:

Robotics and Automation, IEEE Transactions on  (Volume:19 ,  Issue: 3 )

Date of Publication:

June 2003

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