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TECHNICAL PAPERS
Apr 1, 2006

Calibration of Strapdown Magnetometers in Magnetic Field Domain

Publication: Journal of Aerospace Engineering
Volume 19, Issue 2

Abstract

This paper presents an algorithm for calibrating strapdown magnetometers in the magnetic field domain. In contrast to the traditional method of compass swinging, which computes a series of heading correction parameters and thus is limited to use with two-axis systems, this algorithm estimates magnetometer output errors directly. Therefore, this new algorithm can be used to calibrate a full three-axis magnetometer triad. The calibration algorithm uses an iterated, batch least-squares estimator that is initialized using a two-step nonlinear estimator. The algorithm is simulated to validate convergence characteristics and further validated on experimental data collected using a magnetometer triad. It is shown that the postcalibration residuals are small and result in a system with heading errors on the order of 1to2degrees .

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Acknowledgments

The writers wish to acknowledge the FAA Satellite Navigation Product Team and the Office of Technology and Licensing at Stanford University for sponsoring the research reported in this paper.

References

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Information

Published In

Go to Journal of Aerospace Engineering
Journal of Aerospace Engineering
Volume 19Issue 2April 2006
Pages: 87 - 102

History

Received: Feb 2, 2004
Accepted: Mar 22, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006

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Authors

Affiliations

Demoz Gebre-Egziabher [email protected]
Assistant Professor, Dept. of Aerospace Engineering and Mechanics, Univ. of Minnesota, Twin Cities, 110 Union St., N.E., 107 Akerman Hall, Minneapolis, MN 55455. E-mail: [email protected]
Gabriel H. Elkaim [email protected]
Assistant Professor, Computer Engineering Dept., Univ. of California, Santa Cruz, 1156 High St., Santa Cruz, CA 95064. E-mail: [email protected]
J. David Powell [email protected]
Professor Emeritus, Dept. of Aeronautics and Astronautics, Stanford Univ., Durand Building, 496 Lomita Mall, Stanford, CA 94305-4035. E-mail: [email protected]
Bradford W. Parkinson [email protected]
Professor Emeritus, Dept. of Aeronautics and Astronautics, Stanford Univ., Durand Building, 496 Lomita Mall, Stanford, CA 94305-4035. E-mail: [email protected]

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