2013•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Research on self-calibration method for tri-axial magnetic compass
Zhi Li, Xiang Li
Open publisher page 1 citations
Abstract
A novel method for the self-calibration of a tri-axial magnetic compass is discussed in this paper. Firstly, the conventional calibration method of tri-axial magnetometer in compass based on ellipsoid fitting is theoretically analyzed, and its weakness is demonstrated. Secondly, an improved calibration scheme for both the magnetometer and accelerometer in a tri-axial magnetic compass is proposed, which utilize the invariance of the dot product of two constant vectors and can overcome the disadvantages of the ellipsoid fitting method. The proposed method is verified by numerical simulation and experiment, and the results prove its superiority over the conventional algorithm of ellipsoid fitting.