Differential mode of operation for Coriolis vibratory gyro with ring-like resonator

Trends of Ukrainian all digital coriolis vibratory gyroscopes developments

“…It consists of two excitation channels X and Y and phase control channel that equalize resonant frequencies of X and Y channels reducing measurement errors. Besides, by changing vibration amplitudes A 1 and A 2 of X and Y channels, respectively, scale factors of these channels can be changed [3]. At proper adjustment of these amplitudes scale factors of the two channels can be equalized, hence, sum of measurements (z x + z y ) cancels angle rate and give information about bias components in real time.…”

“…NEW CVG DEVELOPMENT Differential variant of CVG for ring-like resonators was proposed by Ukrainian specialists in [3]. Differential CVG can be realized by dislocation of standing wave between X in and Y in electrodes under angle   0,45 o as depicted in Fig.…”

“…Difference of the two channel signals gives 2 and compensates for the errors equal for each channel. Sum of two channel signals cancels angle rate  and carries information about bias components, which can be used to correct difference channel errors [3]. Differential CVG standing wave is depicted in Fig.…”

Differential CVG shock damping capacity computer simulation results

“…Under the proper tuning sum of two sense channels, z x +z y , has not information about angle rate, but carry information about bias components. The difference, z x -z y , has information of 2 and bias components which were not compensated for [2].…”

“…Sum of these two channels under proper tuning can compensate for the angle rate measured and gives bias components information during rate measurements. This bias information can be used, as noted in [2], to correct bias components in the first, difference channels signal, to increase measurement accuracy that results in more accurate navigation and attitude parameters determination. Navigation systems as a rule experience shocks when measuring angle rate that results in erroneous angle rate.…”