High-precision synchronous test method of vibration performance parameters for fused quartz hemispherical resonator

Wei, Zhennan; Yi, Guoxing; Huo, Yan; Xi, Bin; Zhao, Yu

doi:10.1016/j.measurement.2021.109924

Cited by 20 publications

(1 citation statement)

References 31 publications

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“…The quality-factor and frequency-split of the hemispherical resonator are usually obtained by measuring the distance between adjacent resonant peaks in the hemispherical resonator free vibration Bode diagram. When the qualityfactor is high and the frequency-split is low, the inherent frequency drift during free vibration is greater than the frequencysplit itself, which makes the resonance peaks overlap over a wide range and makes it impossible to measure the resonance peak parameters effectively [10][11] . With the help of LDV, the micron level vibration of the hemispherical resonator surface could be measured non-contact, the vibration pattern of the hemispherical resonator could be obtained quickly by combining the dynamics model, and the efficiency and accuracy of the vibration test could be significantly improved eventually.…”

Section: Introductionmentioning

confidence: 99%

Non-contact laser-based test method for vibration performance parameters of hemispherical resonator

Wang,

Yi,

Wei

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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The high-precision measurement of hemispherical resonator vibration performance parameters has been an obstacle limiting the development of high-precision development of Hemispherical Resonator Gyro (HRG). In this paper, a laserbased contactless testing method for the hemispherical resonator vibration performance parameter is proposed to solve the problem of low efficiency and accuracy in the current hemispherical resonator vibration performance parameter testing method. A hemispherical resonator laser vibration measurement system is constructed, and a high-precision identification method of hemispherical resonator vibration performance parameters based on envelope analysis is proposed. Simulation and experimental results show that the free-decaying vibration signals of the hemispherical resonator can be accurately obtained by laser contactless measurement, and the vibration parameters, such as inherent frequency, frequency-split, quality-factor, as well as modal azimuthal angle of the hemispherical resonator could be identified in one-time test by fitting the obtained vibration signals with proposed nonlinear optimization identification method.

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Section: Introductionmentioning

confidence: 99%