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Impact of gyroscope operation above the critical bifurcation threshold on scale factor and bias instability

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8 Author(s)
Nitzan, S. ; Univ. of California, Davis, Davis, CA, USA ; Su, T.-H. ; Ahn, C. ; Ng, E.
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This paper investigates the impact of operating a vibratory rate gyro (VRG) at large oscillation amplitude where the VRG's driven axis behaves like a nonlinear oscillator, described by the Duffing equation. Although open-loop resonators operating above a critical amplitude exhibit catastrophic jump instabilities, we demonstrate that through closed-loop operation, the drive axis can be stably operated at an amplitude above this threshold without impacting drive-axis stability or bias instability, resulting in decreased Angle Random Walk (ARW).

Published in:

Micro Electro Mechanical Systems (MEMS), 2014 IEEE 27th International Conference on

Date of Conference:

26-30 Jan. 2014