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This work presents investigation of differential Coriolis vibratory gyroscope ability to external shock suppression. First of all pulse amplitude in voltage caused by external mechanical shock of 100 g is estimated for the two sensor designs. Then, using differential Coriolis vibratory gyroscope Simulink model, output signals of two measurement channels are analyzed. It is shown that differential Coriolis vibratory gyroscope damps amplitude of erroneous angle rate caused by shock directed along sensing axis of no less than 3 times in comparison with non differential Coriolis vibratory gyroscope. Influence of lateral shock is also analyzed.

This work presets one of the ways to compensate for the bias in differential mode of Coriolis vibratory gyro operation. To compensate for the bias it is necessary to know both channels scale factors, SF x and SF y of differential Coriolis vibratory gyro, which, as a rule, are known by the results of calibration procedure and elastic wave angle  relative to one of the two drive axes which can be established in advance. This paper presents the different variants of bias compensation algorithms which can be applied to compensate for initial gyro bias and bias drift in motion. Experimental results on differential Coriolis vibratory gyro key parameters temperature influence are also presented.

Differential mode of operation as a third mode unlike the first one -rate and second one -rateintegrating modes of vibratory gyroscopes is analyzed in this paper. In the differential mode of operation the standing wave is keeping in between the electrodes. In this case two X and Y measurement channels are created with opposite signs of angle rates. Biases and scale factors of X and Y measurement channels are dependant on standing wave angular position  relative to drive, X, electrode. There is angular position  * at which X measurement channel scale factor SF x is equal to Y measurement channel scale factor SF y . Rejection factors of external acoustic impulses which frequency is close to resonant one, and also of constant and variable magnetic fields are experimentally determined in this paper when standing wave angle is located at the  * angular position. As opposed to other types of differential gyros that can be implemented using two or multi-mass resonator designs, single-mass resonator gyros can have higher rejection factors for different disturbances at the  * angular position of standing wave providing meeting the requirements of many important applications. Test results show excellent disturbance rejection properties of differential mode of operation for single-mass resonator gyros. Comparison of responses of the differential mode with the rate mode of the same gyro on disturbances is also carried out in this work.