Real Time Q-Factor Mismatch Detection For Rate Integrating Gyroscope Using Amplitude Modulated Driving Signal

Abstract

In this paper, a real-time quality factor (Q-factor) mismatch detection method for a degenerated resonator used in quadrature frequency modulated (QFM) and rate integrating gyroscopes (RIG) was proposed and experimentally demonstrated. The amplitudes of the oscillation which is usually not used in the conventional QFM/RIG were used for the Qfactor mismatch detection. A dynamic mismatch compensation technique was developed to eliminate the Q-factor mismatch even in the transient state. By combining these methods, the Qfactor mismatch was successfully detected. The proposed method can be used in the QFM/RIG during measurement, because the amplitude modulation does not disturb the frequency and phase of oscillations.