FIELD: instrument engineering.
SUBSTANCE: invention relates to the field of gyroscopic instrument-making and is intended to determine values of systematic (constant) components of zero offset of triaxial laser gyroscope (TLG) during calibrations (certification) of strapdown inertial navigation systems based on TLG, or their components. Method of determining systematic components of TLG zeros is that predetermined is condition of orthogonality of sensitivity TLG axes, then the laser gyroscope is installed on the turn table faceplate so that the rotation axis of the faceplate is collinear with the main diagonal of the triangular angle formed by the TLG sensitivity axes, and in this position, the Earth's rotation speed projections on the TLG sensitivity axis are determined. Then the faceplate is first turned through angle of 120°, then 240° relative to initial position and in each position of TLG are determined projections of rotation speed of Earth on axis of sensitivity TLG. Then the value of the systematic component of the zero shift of the corresponding TLG sensitivity axis is calculated from the ratio:
where i=1, 2, 3 is laser gyroscope sensitivity axis number; ΩE is a complete vector of the Earth's rotation speed (15.041°/h).
EFFECT: reduction of labor intensity, expansion of technological capabilities and improvement of accuracy of determination of systematic components of shifts of zeros TLG.
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