GYROCOMPASSING METHOD USING ANGULAR VELOCITY SENSOR Russian patent published in 2019 - IPC G01C21/00 

FIELD: machine building.

SUBSTANCE: invention relates to the field of accurate instrumentation and can be used in the development of analytical-type gyrocompasses. Method of gyrocompassing using angular velocity sensor (AVS) consists in the fact that after initial exposure of AVS sensitivity axis sequential discrete rotation of AVS sensitivity axis at specified angles is made to plane of local horizon in direction of plane of local meridian (n-1) times, in each next position of sensitivity axis of AVS low-frequency filtration of output signal of AVS is performed during fixed time interval. After that, pairwise subtraction of signals received in adjacent angular positions of sensitivity axis of the AVS is carried out, and termination of rotation is determined either by achieving a predetermined value of value n, or by changing the sign of the difference of signals obtained in adjacent angular positions of the axis of sensitivity of the AVS. Before the gyrocompassing process begins, accurate differences are calculated for the Earth angular velocity projection on the sensitivity axis of the AVS for all possible neighbouring angular orientation values relative to the local meridian plane in a given interval of variation thereof, from the array of which by selection by selection (n-1) successive values of exact differences of projections of the angular velocity of the Earth, which maximally match by a given criterion of coincidence with a number of corresponding (n-1) values of signal differences obtained in adjacent angular positions of the axis of sensitivity of the AVS, after which an angle is determined relative to the plane of the local meridian, corresponding to the n-th accurate value of the projection of the angular velocity of the Earth on the axis of sensitivity of the AVS, which with high accuracy is the angle of the azimuth of the n-th position of the axis of sensitivity of the angular velocity sensor.

EFFECT: technical result is higher accuracy of determining local meridian direction using AVS of any type.

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