Orthogonal coupling error calibration method for hemispherical resonator gyroscope

The invention relates to the technical field of gyroscopes, in particular to a hemispherical resonator gyroscope orthogonal coupling error calibration method, which comprises the following steps of: keeping the sensitive angular velocity of a gyroscope at a constant value; the phase change of the orthogonal control force is controlled, the calculation module calculates the corresponding orthogonal control force according to the formula, the phase when the minimum value is obtained through second-order polynomial fitting is fed back to the upper computer, and the DDS of the gyroscope is controlled by the upper computer to replace the orthogonal control phase. According to the method provided by the invention, the phase of the orthogonal control force is changed, the orthogonal control force is calculated, then fitting is performed through a second-order polynomial, the phase of the control force when the minimum value is reached is obtained, the phase of the control force is fed back to the DDS of the gyroscop