Please use this identifier to cite or link to this item:
Title: Dynamic characterization of a microgyroscope by digital image spectrum correlation
Authors: Sun, W. 
Quan, C. 
He, X.
Keywords: digital image spectrum correlation
dynamic characteristics
micromechanical vibratory gyroscope
temporal serial images
wavelet transform
Issue Date: 2008
Citation: Sun, W., Quan, C., He, X. (2008). Dynamic characterization of a microgyroscope by digital image spectrum correlation. Optical Engineering 47 (3) : -. ScholarBank@NUS Repository.
Abstract: In order to have an efficient design methodology and achieve high-performance inertial instruments, it is important to analyze the dynamic characteristics of micromechanical vibratory gyroscopes. In this paper, a novel optical method based on a high-speed CMOS camera and digital image spectrum correlation is developed to measure the motion of the sensitive elements. Unlike digital image correlation (DIC) in the spatial domain, correlation in the spectral domain gives direct access to the whole image under translational motion, which retains all the advantages of DIC and provides an expanded range of measurement. In addition, the proposed method is much faster in computation and capable of calculating dynamic temporal serial images in real time. The proposed method is employed to obtain the displacement of temporal series images and to extract dynamical parameters such as resonant frequency and quality factor at atmospheric pressure. During dynamic testing, the discrete wavelet transform is employed to eliminate the low-frequency components, and the continuous wavelet transform (CWT) for identification of the frequency and damping ratio. Experimental results show that the proposed method is a direct inspection tool and a practical alternative to the conventional electrical measurements of micromechanical vibratory gyroscopes. © 2008 Society of Photo-Optical Instrumentation Engineers.
Source Title: Optical Engineering
ISSN: 00913286
DOI: 10.1117/1.2896537
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 20, 2019


checked on Mar 5, 2019

Page view(s)

checked on Nov 17, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.