Title :
Autocalibration of a magnetic compass without heading reference
Author :
Zhang, Qi ; Lei, Liang-shui ; Fan, Jiang ; Liu, Song
Author_Institution :
Dept. of Navig. Eng., Naval Univ. of Eng., Wuhan, China
Abstract :
The electric compass is a useful tool to measure the heading, but it has measurement errors that are sensitive to the external interferences. In this paper, a new method based on improved ellipse fitting model is proposed to calibrate the interference error without heading reference. A process is developed with estimating accurate parameters base on least-squares algorithm. The max deviation angle measured by the compass is 2.1° during the experiment. It is much below the compass initial accuracy and it shows that this method can be used as a reference.
Keywords :
calibration; compasses; magnetic sensors; navigation; parameter estimation; compass initial accuracy; dead reckoning sensor; deviation angle; ellipse fitting model; interference error; least squares algorithm; magnetic compass autocalibration; parameter estimation; Electronic compass; Sensor calibration; navigation;
Conference_Titel :
Environmental Science and Information Application Technology (ESIAT), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-7387-8
DOI :
10.1109/ESIAT.2010.5567331
