F. Dicaprio et Mm. Stanisic, THE KINEMATIC CONTROL EQUATIONS OF A SINGULARITY-FREE 6-DEGREE-OF-FREEDOM MANIPULATOR, Journal of mechnical design, 116(1), 1994, pp. 17-21
In this paper, one symmetrically actuated double pointing system is us
ed in the shoulder subassembly, and another is used in the wrist subas
sembly of a six-degree-of-freedom manipulator. In a previous paper, th
is manipulator was shown to be free of singularities. In this paper, t
he position control equations are derived.