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Improving hand-eye calibration for robotic grasping and manipulation

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2 Author(s)
Axelrod, B. ; iRobot Corp., Bedford, MA, USA ; Huang, W.H.

Hand-eye calibration is an important component of robotic systems that perform manipulation and grasping tasks. However, calibration is often an onerous process - there are many parameters that must be estimated for the sensors and manipulators, resulting in a high-dimensional nonlinear estimation problem. While it is easy to obtain an approximately correct hand-eye calibration, reducing the error further requires increasingly greater effort. We have developed a simple method for increasing the accuracy of an approximately correct hand-eye calibration. This method does not require any external instrumentation and is unique in that it applies a transformation to sensed object locations to produce commanded end-effector locations. This method has been applied to the robot for the DARPA ARM-S program, consisting of a 7 DOF arm and a sensor head mounted atop a 4 DOF neck. We describe the theory of our approach, our implementation, and experimental results.

Published in:

Technologies for Practical Robot Applications (TePRA), 2012 IEEE International Conference on

Date of Conference:

23-24 April 2012