In this paper, we present a software-defined frequency modulation and rate integrating gyroscope (SD-FM/RIG) using a doughnut mass resonator (DMG). A control system including CW/CCW demodulators, numerically controlled oscillators, and feedback controllers was implemented as the software in a micro processing unit (MPU). We demonstrated the independent control of two degenerated eigenmodes. Furthermore, we implemented a method to detect mismatches in the resonator based on amplitude modulation and demodulation techniques. The mismatches were successfully detected, continuously recorded for over 1 hour, and observed to shift in value.
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Tsukamoto et al. (2024) studied this question.
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