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High-Performance SOI-MEMS Gyroscope with Decoupled Oscillation Modes

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3 Author(s)
Alper, S.E. ; Middle East Technical University, Department of Electrical and Electronics Eng., Ankara, TURKEY ; Azgin, K. ; Akin, T.

This paper presents a new, high-performance SOI-MEMS gyroscope with decoupled oscillation modes. The gyroscope structure allows to achieve matched-resonance-frequencies, large drive-mode oscillation amplitude, high sense-mode quality factor, and low mechanical crosstalk, demonstrating a measured noise-equivalent rate of 90 (deg/hr)/Hz1/2even at atmospheric pressure. The angular rate sensitivity of the gyroscope is 100 µ V/(deg/sec) at atmospheric pressure. This value improves to 2.4mV/(deg/sec) at vacuum, for which the measured noise-equivalent rate of the gyroscope reaches to 35 (deg/hr)/Hz1/2. The R2-nonlinearity of the gyroscope is measured to be better than 0.02%. The gyroscope has a low quadrature signal of 70deg/sec and a short-term bias stability of 1.5deg/sec.

Published in:

Micro Electro Mechanical Systems, 2006. MEMS 2006 Istanbul. 19th IEEE International Conference on

Date of Conference:

2006

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