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Temperature Drift Self-calibration for Honeycomb-like Disk Resonator Gyroscope

This paper reports a self-calibrating method based on the mode reversal to real-time compensation the temperature drift of Honeycomb disk resonator gyroscope (HDRG). Through analyzing the mechanism of the temperature drift and designing the experiment of verification, the temperature drift of HDRG can be effectively suppressed. It is demonstrated that the zero-rate bias (ZRB) of HDRG in turn-on period can reach 0.08 °/h (1σ) with self-calibrating method. Also, the bias stability of 1.85 °/h (1σ) is realized when the temperature is changed from 0 ℃ to 60 ℃ at the heating speed of 1 ℃/min. Interestingly, the phenomenon of nonlinear change of ZRB is observed at under variable temperature, which may be due to the thermal stress of the immature packaging of device or the modal coupling between different modes of MEMS resonator. Finally, the approach in this paper is also widely applicable to other vibration inertial sensors with symmetrical mode shapes, which may be useful for ZRB compensation on inertial sensors with high performance.