Abstract

A computer oriented method for deriving sensitivity functions of dynamic parameters of the mechanism and actuators for an open chain manipulator system is presented. The manipulator system is observed under two modes: the nominal mode (feedforward), where the manipulator is driven by nominal input to the actuators, and the deviation mode, where the manipulator motion is controlled by local feedback loops. These sensitivity functions can be used for evaluating the quality of the chosen robot parameters with respect to sensitivity of their variation, and in evaluating the effect of local feedback loops in the case of parameter variation. The algorithms are illustrated by an example of a six degree-of-freedom robotic manipulator.

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