Structural-acoustic coupling effects on the non-vacuum packaging vibratory cylinder gyroscope.
Structural-acoustic coupling effects on the non-vacuum packaging vibratory cylinder gyroscope.
复制标题
非真空封装振动圆柱陀螺仪的结构声耦合效应
DOI：
10.3390/s131217176
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发表时间：
2013-12-13
期刊：
影响因子：
--
通讯作者：
Xiao D
中科院分区：
文献类型：
--
作者：
Xi X;Wu X;Wu Y;Zhang Y;Tao Y;Zheng Y;Xiao D
振动圆柱陀螺仪的谐振壳通常封装在金属帽中。为了降低生产成本，部分振动气缸陀螺仪不采用真空封装。然而，在非真空封装条件下，可能存在内部声学噪声，导致施加在谐振壳上的相当大的声压。基于结构声耦合理论，本文提出了声压下谐振壳的动力学行为。引入有限元（FE）模型来定量分析结构声耦合的影响。研究了直接影响谐振腔振动的几个主要因素，例如密封盖尺寸和真空度。结果表明，考虑结构声耦合效应时，谐振壳体的振幅和工作频率都会发生变化。此外，还进行了实验研究结构声耦合对陀螺仪灵敏度的影响。当谐振壳和密封盖之间的径向间隙尺寸从 0.5 mm 变为 20 mm 时，观察到比例因子增加了 32.4 mV/°/s，工作频率变化了 6.2 Hz。
The resonant shells of vibratory cylinder gyroscopes are commonly packaged in metallic caps. In order to lower the production cost, a portion of vibratory cylinder gyroscopes do not employ vacuum packaging. However, under non-vacuum packaging conditions there can be internal acoustic noise leading to considerable acoustic pressure which is exerted on the resonant shell. Based on the theory of the structural-acoustic coupling, the dynamical behavior of the resonant shell under acoustic pressure is presented in this paper. A finite element (FE) model is introduced to quantitatively analyze the effect of the structural-acoustic coupling. Several main factors, such as sealing cap sizes and degree of vacuum which directly affect the vibration of the resonant shell, are studied. The results indicate that the vibration amplitude and the operating frequency of the resonant shell will be changed when the effect of structural-acoustic coupling is taken into account. In addition, an experiment was set up to study the effect of structural-acoustic coupling on the sensitivity of the gyroscope. A 32.4 mV/°/s increase of the scale factor and a 6.2 Hz variation of the operating frequency were observed when the radial gap size between the resonant shell and the sealing cap was changed from 0.5 mm to 20 mm.
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影响因子：
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作者：
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影响因子：
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