MAGNETIC SENSOR CALIBRATION FOR AIRCRAFT

摘要

A method of magnetic sensor calibration for aircraft comprises obtaining attitude data, heading angle data, position data, and date information; inputting the position data and date into an earth magnetic field (EMF) model and into an EMF model correction map; inputting the attitude and heading angle data into a NOLL to body frame transformation module; outputting an EMF model vector from the EMF model; outputting an EMF correction vector from the EMF model correction map; compensating the EMF model vector with the EMF correction vector to produce a corrected EMF model vector; inputting the corrected EMF model vector into the transformation module; inputting magnetic field measurements data into a calibration processing unit; inputting true earth magnetic field data from the transformation module into the processing unit; computing compensation coefficients in the processing unit based on the magnetic field measurements and the true earth magnetic field; and storing the compensation coefficients.

主权项

1. A method of magnetic sensor calibration for an aircraft, the method comprising:
obtaining attitude data, heading angle data, position data, and date information for the aircraft; inputting the position data and the date information into an earth magnetic field model; inputting the position data and the date information into an earth magnetic field model correction map; inputting the attitude data and the heading angle data into a north oriented local level (NOLL) to body frame transformation module; outputting an earth magnetic field model vector from the earth magnetic field model; outputting an earth magnetic field model correction vector from the earth magnetic field model correction map; compensating the earth magnetic field model vector with the earth magnetic field model correction vector to produce a corrected earth magnetic field model vector; inputting the corrected earth magnetic field model vector into the NOLL to body frame transformation module; inputting magnetic field measurements data into a calibration processing unit; inputting true earth magnetic field data from the NOLL to body frame transformation module into the calibration processing unit; computing compensation coefficients in the calibration processing unit based on the magnetic field measurements data and the true earth magnetic field data; and storing the compensation coefficients in a memory unit.