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Published on: June 19, 2016
Use of a Force-Torque Sensor for Self-Calibration of a 6-DOF Medical Robot
Ahmed Joubair1, Long Fei Zhao2, Pascal Bigras3
1École de Technologie Supérieure (ÉTS), Montreal, QC H3C 1K3, Canada. ahmed.joubair.1@ens.etsmtl.ca.
Abstract:
The aim of this paper is to improve the position accuracy of a six degree of freedom medical robot. The improvement in accuracy is achieved without the use of any external measurement device. Instead, this work presents a novel calibration approach based on using an embedded force-torque sensor to identify the robot's kinematic parameters and thereby enhance the positioning accuracy. A simulation study demonstrated that our calibration approach is effective, whether or not any measurement noise is present: the position error is improved, inside the robot target workspace, from 12 mm to 0.320 mm, for the maximum values, and from 9 mm to 0.2771 mm, for the mean errors.
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