Improved accuracy metallic resonator CVG

Chikovani, V. V.; Yatsenko, Yu.A.; Barabashov, A.S.; Marusyk, P.I.; Umakhanov, E.O.; Taturin, V.N.

doi:10.1109/maes.2009.5109952

Cited by 41 publications

(26 citation statements)

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“…Gorman, P., +, AES-M Oct 2009 17-22 Digital signal processing chips Improved accuracy metallic resonator CVG. Chikovani, V.v., +, AES-MMay 200940-43 Digital …”

Section: Design Techniquesmentioning

confidence: 99%

Annual index

2009

IEEE Aerosp. Electron. Syst. Mag.

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“…Gorman, P., +, AES-M Oct 2009 17-22 Digital signal processing chips Improved accuracy metallic resonator CVG. Chikovani, V.v., +, AES-MMay 200940-43 Digital …”

Section: Design Techniquesmentioning

confidence: 99%

Annual index

2009

IEEE Aerosp. Electron. Syst. Mag.

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“…Coriolis vibratory gyroscopes (CVGs), especially those with axisymmetric shell resonators, have many advantages including high reliability, considerable stability, long life, low power consumption, and a maintenance-free concept, and are widely used in navigation fields and platform stabilization systems [1][2][3][4][5][6][7][8][9]. For this type of gyroscope, there are mainly two types of axisymmetric shell resonators-hemispherical shell resonators and cylindrical shell resonators [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature Variation on the Vibrational Characteristics of Fused Silica Cylindrical Resonators for Coriolis Vibratory Gyroscopes

Peng¹,

Qiu²,

Luo³

et al. 2020

Sensors

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The fused silica cylindrical resonator is a type of axisymmetric resonator that can be used for Coriolis vibratory gyroscopes. Although the resonant frequency, frequency mismatch, and Q factor are natural properties of the resonator, they can change with temperature. Therefore, the temperature drift severely limits the detection accuracy and bias stability of the gyroscope. In this paper, the influence of temperature variation on the vibrational characteristics of fused silica cylindrical resonators was investigated. Experiments were performed on a fused silica cylindrical resonator coated with Cr/Au films. It was shown that at the temperature range from 253.15 K to 353.15 K, the resonant frequency linearly increased with temperature, the frequency mismatch remained unchanged, and the Q factor gradually increased till about 333.15 K, when it began to decrease. Meanwhile, the change of thermoelastic damping with temperature may dominate the variation of Q factor at the temperature range from 253.15 K to 353.15 K. This phenomenon was theoretically analyzed and the variation trends of results were consistent with the theoretical analysis. This study indicates that, for the fused silica cylindrical resonator, to discover the influence of temperature variation on the resonant frequency, frequency mismatch, and Q factor, there are certain rules to follow and repeat. The relationship between temperature and frequency can be established, which provides the feasibility of using self-calibration based on temperature characteristics of the resonator for temperature drift compensations. Additionally, there is an optimum temperature that may improve the performance of the Coriolis vibratory gyroscope with the fused silica cylindrical resonator.

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“…The CRG has many advantages, such as high reliability, high stability, long life, low power consumption, and small size, and is widely used in the medium-and low-precision navigation fields and platform stabilization systems [1][2][3][4][5][6]. The representative products include the Watson Inc.…”

Section: Introductionmentioning

confidence: 99%

Simulations and Experiments on the Vibrational Characteristics of Cylindrical Shell Resonator Actuated by Piezoelectric Electrodes with Different Thicknesses

Luo¹,

Qu²,

Zhang³

et al. 2017

Shock and Vibration

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The resonator is the key element of the Coriolis Vibratory Gyroscope (CVG). The vibrational characteristics of the resonator, including the resonant frequency, vibrational amplitude, and factor, have a great influence on CVG's performance. Among them, the vibrational amplitude mainly affects the scale factor and the signal-to-noise ratio, and the factor directly determines the precision and drift characteristics of the gyroscope. In this paper, a finite element model of a cylindrical shell resonator actuated by piezoelectric electrodes with different thicknesses is built to investigate the vibrational characteristics. The simulation results indicate that the resonant frequency barely changes with the electrode thickness, whereas the vibrational amplitude is inversely proportional to the electrode thickness under the same driving voltage. Experiments were performed with four resonators and piezoelectric electrodes of four sizes, and results were consistent with simulations. The resonant frequencies of four resonators changed within 0.36% after attaching the piezoelectric electrodes. Meanwhile, with the same driving voltage, it was shown that the vibrational amplitude decreased with the increase of electrode thickness. Moreover, thinner electrodes resulted in better factor and therefore better performance. This study may provide useful reference on electrode design of the CVGs.

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Improved accuracy metallic resonator CVG

Cited by 41 publications

References 0 publications

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Influence of Temperature Variation on the Vibrational Characteristics of Fused Silica Cylindrical Resonators for Coriolis Vibratory Gyroscopes

Simulations and Experiments on the Vibrational Characteristics of Cylindrical Shell Resonator Actuated by Piezoelectric Electrodes with Different Thicknesses

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