To ensure the accuracy of the heading measurement, the magnetic compass in UAV calibrated before use. Ellipsoid calibration algorithm used generally, but the operation is complicated. This paper proposes a horizontal rotation calibration algorithm for simplifying the process. The error model of magnetic compass under soft-magnetic and hard-magnetic interference is analyzed. The least-square algorithm identifies parameters of ellipsoid and ellipse. Ellipsoid calibration algorithm estimates soft-magnetic interference. Ellipse calibration algorithm and space geometry algorithm estimate hard-magnetic interference. On the premise of ensuring the calibration accuracy, the algorithm simplifies the calibration operation of the UAV magnetic compass. It reveals the efficiency and practicability of this method by calibration test and flight test. The experimental results meet the requirements of the navigation system.
Application of Horizontal Rotation Calibration Algorithm for Magnetic Compass in UAV
Lect. Notes Electrical Eng.
2021-10-30
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch