Structural Optimization and Excitation Method of Metal-Shell Resonator Gyroscope Driven by Composite Electrodes

This article introduces an innovative approach to address the challenge of inadequate electrostatic excitation in a metal-shell resonator gyroscope. The methodology involves a comprehensive analysis of the gyroscope oscillator’s mechanical model, followed by the creation of an equivalent kinematic model using thin-shell theory and Lagrange planetary equations. To optimize the performance of the gyroscope, finite element simulations are leveraged to fine-tune the dimensional parameters and electrode excitation technique of the resonator gyroscope. The signal detection circuit of the metal-shell resonator gyroscope comprises two key components: an excitation circuit and a detection circuit. The excitation circuit utilizes electrostatic excitation, while the detection circuit employs a
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conversion circuit. This particular circuit converts the oscillations of the gyroscope into voltage variations, enabling accurate detection of the gyroscope’s vibrational signals. The final iteration of the gyroscope prototype demonstrates remarkable performance characteristics. Notably, the gyroscope exhibits exceptional bias stability, with readings of 35 °/h (1 s) and 18 °/h (10 s). The gyroscope’s operational range spans from −257 to 260 °/s, providing a broad measurement capacity. Furthermore, the gyroscope achieves a scale factor nonlinearity of just 1305 ppm, ensuring precise and reliable measurements.