Calibration of Strapdown Magnetometers in Magnetic Field Domain

Autor:	Gabriel Hugh Elkaim, Demoz Gebre-Egziabher, Bradford W. Parkinson, J. David Powell
Rok vydání:	2006
Předmět:	Engineering Heading (navigation) Series (mathematics) business.industry Magnetometer Mechanical Engineering Aerospace Engineering Estimator law.invention Magnetic field law Control theory Compass Convergence (routing) Calibration General Materials Science business Civil and Structural Engineering
Zdroj:	Journal of Aerospace Engineering. 19:87-102
ISSN:	1943-5525 0893-1321
DOI:	10.1061/(asce)0893-1321(2006)19:2(87)
Popis:	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 1 to 2 degrees.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a15965bda9c3654d72e79dd856e794a2 https://doi.org/10.1061/(asce)0893-1321(2006)19:2(87) Zobrazit plný text záznamu Plný text ve formátu PDF