Abstract
Hemispherical shell resonator is the key component of hemispherical resonator gyro (HRG). Based on the finite element method of elasticity, the elastodynamic finite element equation of resonator is established, which obtains the free resonant equation of resonator. In order to analyze the influence of the pole's eccentricity error on vibration characteristics of resonator, a finite element model of hemispherical shell resonator is established by the finite element analysis software ANSYS. The vibration characteristics of the second resonant state for the ideal resonator and the resonator with eccentricity error are investigated. The comparison on the two kinds of influence laws shows that the influence of eccentricity error on resonant frequency causes the frequency difference which can cause the random drift of HRG. The deformation caused by the pole's eccentricity error will affect the zero bias of the HRG, which can be compensated by calibration. The analysis results show that in order to reduce the influence of the pole's eccentricity error on the precision and performance of HRG, the machining error range of eccentricity error should be less than 1.2 μm, which provides a theoretical basis for the processing design and structural error analysis of resonator.
| Translated title of the contribution | 谐振子支柱偏心误差对谐振子振动特性影响分析 |
|---|---|
| Original language | English |
| Pages (from-to) | 101-107 |
| Number of pages | 7 |
| Journal | Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology |
| Volume | 27 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Feb 2019 |
Keywords
- Eccentricity error
- Hemispherical resonator gyro
- Influence analysis
- Resonator
- Vibration characteristics
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