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research-article

Impact of Synchronization in Micromechanical Gyroscopes

[+] Author and Article Information
Martial Defoort

Department of Mechanical and Aerospace Engineering, University of California, Davis 1 Shields Ave, Davis, CA 95616 USA
mjdefoort@ucdavis.edu

Parsa Taheri-Tehrani

Department of Mechanical and Aerospace Engineering, University of California, Davis 1 Shields Ave, Davis, CA 95616 USA
ptaheri@ucdavis.edu

Sarah H. Nitzan

Was with the Department of Mechanical and Aerospace Engineering, University of California, Davis 1 Shields Ave, Davis, CA 95616 USANow with Invensense 1745 Technology Dr #200, San Jose, CA 95110 USA
sarah.nitzan@gmail.com

David A. Horsley

Department of Mechanical and Aerospace Engineering, University of California, Davis 1 Shields Ave, Davis, CA 95616 USA
dahorsley@ucdavis.edu

1Corresponding author.

ASME doi:10.1115/1.4036397 History: Received December 03, 2016; Revised February 17, 2017

Abstract

In this paper, we study the occurrence of synchronization between the two degenerate resonance modes of a micro disk resonator gyroscope. Recently, schemes involving the simultaneous actuation of the two vibration modes of the gyroscope have been implemented as a promising new method to increase their performance. However, this strategy might result in synchronization between the two modes, which would maintain frequency mode-matching but also may produce problems, such as degrading stability and sensitivity. Here, we demonstrate for the first time synchronization between the degenerate modes of a micro-gyroscope and show that synchronization arising from mutual coupling dramatically reduces frequency instability at the cost of increased amplitude instability. We present an alternative synchronization scheme that suppresses this drawback while still taking advantage of a passive frequency mode-match operation.

Copyright (c) 2017 by ASME
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