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Trajectory Generation at or Near Singularities

A method has been devised for controlling the trajectories defined in Cartesian coordinates near or through the kinematic singularities of robot manipulators admitting a closed form kinematic solution. Our work considers a global approach based on ``path energy functions'' which in the regions of the singularities reduce the path velocity in such a way that both joint velocities and accelerations remains bounded without incurring any deviation from the desired path. The existence proof of such path velocity schedules has been established for a large class of manipulators and desired trajectories.

J.E. Lloyd, V. Hayward

Thierry Baron
Mon Nov 13 10:43:02 EST 1995