Method for calibrating combination of strapdown inertial combination gyroscope

Abstract

The invention discloses a method for calibrating the combination of a strapdown inertial combination gyroscope. The method comprises the steps of after the scale factor and the installation error angle of the combination of the gyroscope are known, carrying out significance analysis on the quadratic term coefficient in an error model without a zero order term by sequentially measuring the output values of the strapdown inertial combination at eighteen positions to obtain an actual error model of the gyroscope related to apparent acceleration; calculating all coefficient values in the error model by a calculation formula. Compared with other error coefficient calibration methods, the method can be used for obtaining the error term model of the gyroscope related to apparent acceleration within three coordinate axes of the strapdown inertial combination, and calibrating the error terms of the combination of the gyroscope related to apparent acceleration, thus improving the degree of accuracy of the error model; furthermore, the calibrating process is simple and the needed time is short.

Description

technical field [0001] The invention relates to an error coefficient calibration method, in particular to a method for calibrating the error coefficient of a strapdown inertial combination gyroscope combination related to apparent acceleration, which belongs to the calibration technology of a strapdown inertial combination and can be used for calibrating a gyroscope combination. Background technique [0002] The gyroscope is the core component of the inertial system. It is used for the angular displacement or angular velocity of the sensitive carrier relative to the inertial space. It plays a key role in the performance of the inertial system and is one of the key contents of inertial technology research. In order to completely measure the angular velocity and angular displacement of the carrier in space, the strapdown inertial combination is equipped with three gyroscopes whose sensitive axes are perpendicular to each other, and the direction of the sensitive axis points to ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the existing calibration methods, provide a method for calibrating the strapdown inertial combination gyroscope combination, and realize the calibration of all item error coefficients in the error model related to the apparent acceleration of the gyroscope combination , which solves the problem that the coefficient of the quadratic term cannot be calibrated, and improves the accuracy of the inertial navigation solution

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