Method for compensating a zero-point error in a vibratory...

Details Method for compensating a zero-point error in a vibratory... Method for compensating a zero-point error in a vibratory...

G - Physics

01

C

G01C 19/56 (2006.01)

Patent

CA 2519722

In a method for determination of the zero error of a Coriolis gyro (1'), the frequency of the read oscillation is modulated, the output signal from a rotation rate control loop or quadrature control loop for the Coriolis gyro (1') is demodulated in synchronism with the modulation of the frequency of the read oscillation in order to obtain an auxiliary signal which is a measure of the zero error, a compensation signal is produced, and is passed to the input of the rotation rate control loop or quadrature control loop, with the compensation signal being controlled such that the magnitude of the auxiliary signal is as small as possible.

L'invention concerne un procédé pour déterminer une déviation résiduelle dans un gyroscope vibrant (1'). Ce procédé consiste à : moduler la fréquence de la vibration de sortie ; démoduler le signal de sortie d'un circuit de régulation de vitesse de rotation ou d'un circuit de régulation de quadrature du gyroscope vibrant (1') de manière synchronisée avec la modulation de la fréquence de la vibration de sortie, pour permettre l'obtention d'un signal auxiliaire qui représente une valeur de mesure de la déviation résiduelle ; et produire un signal de compensation qui est appliqué à l'entrée du circuit de régulation de vitesse de rotation ou du circuit de régulation de quadrature, ledit signal de compensation étant régulé de sorte que la valeur du signal auxiliaire soit la plus faible possible.

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