Calibration of gyroscopic systems with vibratory gyroscopes

A method of calibrating a gyroscope to be calibrated in a gyroscopic system comprising at least four vibratory gyroscopes capable of changing vibration position among a plurality of vibration positions;

• a first measurement being provided by said vibratory gyroscope to be calibrated, and a second measurement being provided by a combination of the respective measurements from the other vibratory gyroscopes of the system, said first and second measurements being carried out along a same measurement axis;
• said calibration method comprising the following steps at the level of the vibratory gyroscope to be calibrated:
• /1/ applying, to the gyroscope to be calibrated, over a period of time, an initial command for a change in vibration position from a first vibration position (θ1) to a second vibration position (θ2);
• and
• /2/ determining a calibrated scale factor value of the vibratory gyroscope to be calibrated, on the basis of a value calculated in relation to step /1/, based on the period of time during which the initial command is applied, the initial command, an angular difference between the first and second vibration positions measured according to the first measurement and an angular difference between the first and second vibration positions measured according to the second measurement.