Analysis of vibratory gyroscopes: drive and sense mode resonance shift by coriolis force

Name: Analysis of vibratory gyroscopes: drive and sense mode resonance shift by coriolis force
Author: Cetin, Hakan, Yaralıoğlu, Göksen Göksenin

İsim	Analysis of vibratory gyroscopes: drive and sense mode resonance shift by coriolis force
Yazar	Cetin, Hakan, Yaralıoğlu, Göksen Göksenin
Basım Tarihi:	2017
Basım Yeri	- IEEE
Konu	Gyroscopes, Resonant frequency, Force, Springs, Couplings, Oscillators, Damping
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1558-1748
Kayıt Numarası	1164bb11-405b-4f81-b4d4-29bb77c59947
Lokasyon	Electrical & Electronics Engineering
Tarih	2017
Notlar	TÜBİTAK
Örnek Metin	In this paper, we demonstrate the analysis of coupling between drive and sense systems of vibratory gyroscopes. Vibratory gyroscopes have attracted a lot of interest recently with the development of MEMS gyroscopes. These gyroscopes made their way through portable devices and smart phones. Novel gyroscope architectures have been proposed and analyzed in detail. However, in most of these analyses, coupling between the sense and drive systems was ignored. We analytically show that drive and sense systems are coupled together via Coriolis and centrifugal force. As a result, system resonances shift as the rotation rate increase for linear and torsional gyroscope systems. Starting from a simple gyro system, we calculated the sense and drive resonant frequency shifts in various configurations. Then, for more complex systems where analytical solution is difficult to obtain, we used commercially available FEM tools to determine corresponding frequency shift. In general, we found that the shift is small and can be ignored for linear vibratory gyroscopes where Q of the sense system is less than 2500 for mode matched gyros. But for higher Q systems, the frequency shift may affect the linearity of these gyroscopes. This sets a fundamental limit for the linearity of vibratory gyroscopes. Based on our calculations the non-linearity is above 1% for linear 2-DOF mode-matched vibratory gyroscopes where Q is above 3000 and for torsional 2-DOF vibratory gyroscopes where Q is above 600. Multi-DOF and ring vibratory gyroscopes are also examined. We find that the effect is less pronounced for Multi-DOF gyros, whereas there is a large effect on the linearity of ring gyroscopes.
DOI	10.1109/JSEN.2016.2626518
Cilt	17

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Analysis of vibratory gyroscopes: drive and sense mode resonance shift by coriolis force

Yazar Cetin, Hakan, Yaralıoğlu, Göksen Göksenin

Basım Tarihi 2017

Basım Yeri - IEEE

Konu Gyroscopes, Resonant frequency, Force, Springs, Couplings, Oscillators, Damping

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1558-1748

Kayıt Numarası 1164bb11-405b-4f81-b4d4-29bb77c59947

Lokasyon Electrical & Electronics Engineering

Tarih 2017

Notlar TÜBİTAK

Örnek Metin In this paper, we demonstrate the analysis of coupling between drive and sense systems of vibratory gyroscopes. Vibratory gyroscopes have attracted a lot of interest recently with the development of MEMS gyroscopes. These gyroscopes made their way through portable devices and smart phones. Novel gyroscope architectures have been proposed and analyzed in detail. However, in most of these analyses, coupling between the sense and drive systems was ignored. We analytically show that drive and sense systems are coupled together via Coriolis and centrifugal force. As a result, system resonances shift as the rotation rate increase for linear and torsional gyroscope systems. Starting from a simple gyro system, we calculated the sense and drive resonant frequency shifts in various configurations. Then, for more complex systems where analytical solution is difficult to obtain, we used commercially available FEM tools to determine corresponding frequency shift. In general, we found that the shift is small and can be ignored for linear vibratory gyroscopes where Q of the sense system is less than 2500 for mode matched gyros. But for higher Q systems, the frequency shift may affect the linearity of these gyroscopes. This sets a fundamental limit for the linearity of vibratory gyroscopes. Based on our calculations the non-linearity is above 1% for linear 2-DOF mode-matched vibratory gyroscopes where Q is above 3000 and for torsional 2-DOF vibratory gyroscopes where Q is above 600. Multi-DOF and ring vibratory gyroscopes are also examined. We find that the effect is less pronounced for Multi-DOF gyros, whereas there is a large effect on the linearity of ring gyroscopes.

DOI 10.1109/JSEN.2016.2626518

Cilt 17