微机械梳状驱动音叉陀螺的误差源研究

 定性地讨论了微机械梳状驱动音叉陀螺特有的一些误差源，主要有微机械结构的 Ｂｒｏｗ ｎｉａｎ 噪声、电路噪声、机械耦合误差及电子机械耦合误差等。对上述误差源的认识是微结构制造和电路设计的基础。

ERROR SOURCES IN MICROMACHINED COMB-DRIVE TUNING-FORK GYROSCOPE

In micromachined gyros, input angular rate signals are measured indirectly from displacements by Coriolis forces or torques, and one hundredth or even one thousandth of Augstrom must be resolved resulting in micro or nano Volt electrical outputs. So the resolution of the gyro is very easily affected by error sources, which may even cause operation failure in some cases. These error sources are mainly caused by imperfections during manufacturing and special design, such as subtle imbalances in the mechanical sense element, comb drive oscillations. Some error sources special for micromachined comb drive tuning fork gyro, microstructure Brownian noise, electronic noise, mechanical coupling effects and electromechanical crosstalk, etc. are presented qualitatively in this paper. Some solutions are also discussed. The knowledge of aforementioned error sources is the basis of microstructure fabrication and circuit design.