Patent ID: 7327461
Filing Date: 2008-02-05
Classification: G01C

Abstract:
1. A push-pull method of controlling a laser gyro comprising: providing at least three mirrors for implementing a closed loop light path for two laser beams propagating in opposite directions, subjecting the gyro also to dither movement, providing actuators which are associated with at least two mirrors, said actuators being connected to push-pull control members for controlling the positions of the mirrors so as to minimize the amplitude of a winking signal occurring in a lased intensity signal of the laser beams, measuring a frequency of the winking signal of at least one laser beam, triggering measurement of an amplitude of the winking signal when the measured frequency of the winking signal is less than a predetermined threshold corresponding to passing into a dead band of the gyro, and controlling said actuators through said push-pull control members through the measurement of the amplitude of the winking signal.