bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)



2008 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2009/2010

Editorial Calendar 2009

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal´s cover

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents


Best Articles 2008




Vol. 6, Special Issue, August 2009, pp.128-145





Compensation of Imperfections for Vibratory Gyroscope Systems Using State Observers


Chien-Yu CHI and *Tsung-Lin CHEN

Department of Mechanical Engineering, National Chiao Tung University,

Hsinchu, Taiwan 30056, R.O.C.

*Tel.: +886-3-571-2121 #55127, fax: +886-3-572-0634

*E-mail: tsunglin@mail.nctu.edu.tw



Received: 10 July 2009   /Accepted: 31 July 2009   /Published: 11 August 2009


Abstract: This paper presents a novel approach that can compensate errors resulting from the imperfections of mechanical structures and interface circuits for MEMS gyroscope systems. Different from most of existing researches on gyroscopes wherein the mechanical structure and interface circuit are either assumed to be ideal or optimized individually, this approach uses state estimation techniques to compensate all those errors and to obtain correct angular rates in real time. The mechanical structure errors discussed in this paper may come from structure designs and fabrication imperfections. The interface circuit errors include: mismatch of differential capacitors, parasitic capacitance, offset voltage of operation amplifiers, and circuit noise. Simulation results indicates that, with the presence of those errors and a signal-to-noise ratio around 20, the proposed method can measure time-varying angular rates with a bandwidth up to 30 Hz and a sensing accuracy of 1×10-2 rad/sec.


Keywords: Interface circuit errors, State observers, Gyroscopes, Extended Kalman filter, Signal drifts


Acrobat reader logo Click <here> or title of paper to download the full pages article (732 Kb)





1999 - 2009 Copyright ©, International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - Membership - Submit Press Release

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map