Ellipse
– Operating Handbook
ELLIPSEOHAIR
Once these tests are done the calibration can end. It is not crucial to perform exact 120° turns,
but the procedure should perform rolling points at significantly different headings. In addition
the pitching in the first turn should not be performed at the same heading as the one done in
the second turn.
Note: This procedure can be easily transposed to rotor-craft. The procedure can be
performed in a stationary flight, by making several pitching and rolling maneuvers at
different heading values. The goal is to expose the sensor to as much orientations as
possible.
Ground calibration (2D)
Although this method is not the most accurate, it's possible to calibrate the magnetometer on
the ground, using the “2D” calibration method.
The procedure is really simple and only requires a few steps on the ground to be performed:
1.
Install the sensor as described in previous sections, and place the whole system away
from external magnetic disturbances (buildings, other vehicles, etc).
2.
Place the aircraft on a horizontal platform. The aircraft must be kept horizontal (in its
line of flight level). This is the case with most tricycle landing gears airplanes, but this
should be a concern with conventional landing gears.
3.
Calibration Start. Start the sbgCenter calibration tool and press “start acquisition”
button.
4.
Perform a 360° circle with the aircraft. The calibration mode has to be set on “2D”.
The aircraft should be at least 10m away from any metal building or other aircraft.
5.
Calibration end. Press “Calibrate” and check calibration results. Press “OK” to finalize
the calibration procedure.
Note: For highest performance, please consider the 3D calibration.
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