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首页> 外文会议>Saint Petersburg International Conference on Integrated Navigation Systems; 20040524-26; Saint Petersburg(RU) >SENSITIVITY AND ACCURACY ENHANCEMENT FOR METALLIC RESONATOR CVG
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SENSITIVITY AND ACCURACY ENHANCEMENT FOR METALLIC RESONATOR CVG

机译：金属谐振器CVG的灵敏度和精度增强

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In comparison to micromechanical Coriolis vibratory gyroscopes (CVG), their analogies using metallic resonators, as a rule, are able to provide higher accuracy. Metallic resonators basic disadvantage is low Q-factor, due to gluing piezoelectrods on the vibrating area (rim) of a resonator. The attempts to increase cylindrical resonator Q-factor have led to excitation, control and pick-off resonator modes from the bottom of the cylinder. The latter has resulted in non standard resonator design, that maximizes Q-factor for the account of removing mass surpluses from resonator's working area. In this case, modes controllability is maintained at a good level. As a result resonator Q-factor increases 2-3 times and for resonator diameters 17-22 mm reachs 5000 - 6000 on open air. Despite the fact that there are reserves to substantially enhance CVG sensitivity and reduce noise by increasing resonator diameter (30 mm, 50 mm and more), by resonator vacuumization and also by switching off the Coriolis mode feedback damping, CVG accuracy is restricted by higher metallic resonator sensitivity to temperature. Therefore, metallic resonator CVG temperature drift correction is the most important problem to reach high accuracy. This is important in gyrocompass application, where low noise and high sensitivity can be reached by CVG. Theoretical and experimental investigation of different diameter metallic cylindrical resonator heat-transfer properties are presented in this work. Experimentally proved the possibility to use metallic resonator CVG in precise angle measurement systems, provided that temperature correction method is applied. It was showed that as a temperature sensor resonator natural frequency can be used. Test results are given. Possibility to use metallic resonator CVG in self alignment stapdown INS is discussed.
机译：与微机械科里奥利振动陀螺仪（CVG）相比，使用金属谐振器的类比通常可以提供更高的精度。金属谐振器的基本缺点是Q值低，这是由于在谐振器的振动区域（边缘）上粘贴了压电电极。尝试增加圆柱谐振器的Q因子已导致从圆柱体底部激发，控制和拾取谐振器模式。后者导致了非标准的谐振器设计，该设计最大化了Q因子，以消除谐振器工作区域中的多余质量。在这种情况下，模式可控性保持在良好水平。结果，谐振器的Q因子增加了2-3倍，并且谐振器的直径17-22 mm在露天达到5000-6000。尽管存在通过增加谐振器直径（30 mm，50 mm及更大），通过谐振器真空化以及通过关闭科里奥利模式反馈阻尼来显着提高CVG灵敏度并降低噪声的事实，但较高的金属含量会限制CVG精度谐振器对温度的敏感性。因此，金属谐振器CVG温度漂移校正是达到高精度的最重要问题。这在陀螺罗盘应用中很重要，因为CVG可以实现低噪声和高灵敏度。这项工作提出了不同直径的金属圆柱谐振器传热特性的理论和实验研究。通过实验证明，只要应用温度校正方法，就可以在精密角度测量系统中使用金属谐振器CVG。结果表明，可以使用固有频率作为温度传感器谐振器。给出测试结果。讨论了在自对准订钉INS中使用金属谐振器CVG的可能性。

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