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Shen, Qiang; Wang, Xinpeng; Wu, Yixuan; Xie, Jianbing
Sensors, 07/2018, Letnik: 18, Številka: 8Journal Article
The oscillation of the sense mode of the micro-machined Coriolis vibratory gyroscope (MCVG) with high quality factor ( ) is analyzed in this study and the corresponding force feedback control scheme is presented to suppress this oscillation. The controller consists of integrator and some filters, instead of the common but complicated demodulation and remodulation modules. Compared with using no oscillation suppression scheme, the proposed simplified oscillation suppression control scheme can achieve an improvement of the sense mode of the MCVG. The inband spectrum ripple of the angular rate output are improved from 51.4 dB to 4.23 × 10 dB. Correspondingly, these two performance parameters are improved by 370.4 and 186.2 times, which are higher than two orders of magnitude, respectively. Bias stability is improved from 9.72 deg/h to 2.5 deg/h. Test results prove that the proposed control scheme is effective in suppressing the oscillation.
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