An avionics system comprises one or more attitude sources, each configured to produce a respective calculated attitude solution; at least one magnetometer configured to measure magnetic field; and at least one attitude monitor configured to use the respective calculated attitude solution from one of the attitude sources to project the measured magnetic field estimate or an Earth Magnetic Field Model (EMFM) estimate such that the measured magnetic field estimate and the EMFM estimate are in a common shared frame. The at least one attitude monitor is further configured to determine a difference between the measured magnetic field estimate and the EMFM estimate in the common shared frame. The at least one attitude monitor is further configured to output an alert, which indicates that the respective calculated attitude solution used to project the measured magnetic field estimate or the EMFM estimate is in error, if the difference exceeds a predetermined threshold.
METHOD OF DETECTING ATTITUDE FAULTS BASED ON MAGNETOMETER MEASUREMENTS
VERFAHREN ZUR ERKENNUNG VON LAGEFEHLERN AUF DER BASIS VON MAGNETOMETERMESSUNGEN
PROCÉDÉ DE DÉTECTION DE DÉFAUTS D'ATTITUDE SUR LA BASE DE MESURES PAR UN MAGNÉTOMÈTRE
2019-01-30
Patent
Elektronische Ressource
Englisch
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