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Acceleration-insensitive fully-decoupled tuning fork (FDTF) MEMS vibratory gyroscope with 1??/HR BIAS instability

机译:加速度不敏感的全解耦调谐叉(FDTF)MEMS振动陀螺仪,具有1 ?? / HR偏置不稳定性

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This study presents the design and implementation of a single-axis MEMS vibratory gyroscope with reduced coupling error and enhanced vibration resistance. Features of this study are (1) exploiting the fully-decoupled mechanism to minimize the coupling error between the operating modes; (2) introducing the tuning fork architecture combined with specific coupler designs to enhance the vibration resistance; (3) a compact structural design with small footprint (2mm ×2mm). Measurement results show a reduced coupling error signal of near 126°/s, and the acceleration sensitivity is below 1.5°/s/g. Moreover, the angular rate sensitivity is 1.25mV/°/s and the non-linearity is 0.68% within +300°/s. Contributed to the reduction of the coupling error and external vibration interference, the FDTF gyroscope achieved a bias instability of 1°/hr and the ARW of 7.2°/hr/°Hz.
机译:本研究介绍了单轴MEMS振动陀螺仪的设计和实现,具有降低的耦合误差和增强的抗振性。本研究的特征是(1)利用完全解耦机制,以最小化操作模式之间的耦合误差; (2)推出调谐叉式架构与特定耦合器设计相结合,提高抗振性; (3)紧凑的结构设计,占地面积小(2mm×2mm)。测量结果表明,近126°/ s的减小的耦合误差信号,加速度灵敏度低于1.5°/ s / g。此外,角速率灵敏度为1.25mV /°/ s,非线性在+ 300°内的非线性为0.68%。有助于减少耦合误差和外部振动干扰,FDTF陀螺仪达到1°/ HR的偏置不稳定性,以及7.2°/ HR /°Hz的ARW。

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