FIELD: physics.
SUBSTANCE: method of determining heading is realised using an inertial device (1) comprising at least one vibratory angle sensor (3) having a resonator associated with a detector and device for setting the resonator into vibration, connected to a control device to provide a first mode of operation in which the vibration can freely vary in an angular frame of reference of the resonator, and a second mode of operation in which the vibration is maintained at a certain angle in the frame of reference of the resonator. The method involves controlling said sensor in the second mode of operation to maintain the electric turning angle corresponding to a least error value of the sensor, and controlling said sensor in the first mode of operation to take a heading measurement, and controlling said sensor in the second mode of operation once the heading measurement has been taken and until the next measurement in order to maintain the electric turning angle.
EFFECT: invention enables to limit the undesirable effect of the precession mode of the gyroscope on measurement accuracy.
6 cl, 1 dwg
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