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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音叉(FDTF)MEMS振动陀螺仪,具有1?/ HR BIAS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:这项研究提出了具有减小的耦合误差和增强的抗振性的单轴MEMS振动陀螺仪的设计和实现。这项研究的特点是(1)利用完全解耦的机制来最大程度地减小工作模式之间的耦合误差; (2)引入音叉架构并结合特定的耦合器设计以增强抗振性; (3)紧凑的结构设计,占地面积小(2mm×2mm)。测量结果表明,耦合误差信号减小了约126°/ s,并且加速度灵敏度低于1.5°/ s / g。此外,角速率灵敏度为1.25mV /°/ s,非线性度在+ 300°/ s之内为0.68%。有助于减小耦合误差和外部振动干扰,FDTF陀螺仪实现了1°/ hr的偏置不稳定性和7.2°/ hr /°Hz的ARW。

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