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The natural frequencies of active mode and sense mode of the prototype are close, the frequency split is 0.06 Hz, and the quality factor is approximately 5000 in atmosphere.
Secondly, the undesired cross-axis coupling effects between drive mode and sense modes are substantially suppressed by the cooperation of mechanical design and an integrated Automatic Gain Control (AGC) loop for drive mode.
The experimental results illustrate that the gyroscope exhibits superior to detect exerted angular rate, in addition to successful suppression upon the cross-axis perturbation between drive mode and sense mode.
A theoretical analysis on the proposed gyroscope is performed using the AMM method and DM method for the forced vibration solution of active mode and sense mode with the inclusion of the Coriolis force coupling.
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The binding mode and sensing mechanism of Flu-Py with Al3+ was verified by density functional theory (DFT) and time dependent density functional theory (TDDFT) calculation.
The 2-DOF vibratory structure could provide drive-mode and sense-mode with large bandwidth and the double 2-DOF sense-modes could provide high gain of gyroscope system, which improves the inherent robustness and sensitivity simultaneously.
In this design, the complete 2-DOF vibratory structure is utilized in drive-mode and sense-mode and also, the 2-DOF sense-mode is implemented in both driving frame and proof frame, which form the double 2-DOF sense-modes.
Different pre-tensioning forces are also applied to reveal the tension effects on the mode shape and sensing signals of the mirror.
Even though we get the maximum response along the sensing direction in case of perfect mode matching of the drive and sense mode frequency, such matching leads to zero bandwidth of the sensor.
The drive and sense mode resonant frequencies of the fabricated device are measured as 28,535 and 30,306 Hz, respectively, which are in agreement with the finite element simulations.
The two-framed gyro has drive and sense mode resonance frequencies of 2500 Hz and 2830 Hz, with its bandwidth tunable between 40-330 Hz.
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