Cart (Loading....) | Create Account
Close category search window
 

Correlation and Spectral Methods for Determining Uncertainty in Propagating Discontinuities

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Ortiz, A.A. ; Dept. of Mech. & Aerosp. Eng., Univ. of Texas at Arlington, Arlington, TX, USA ; Lu, F.K.

The accurate determination of the speed of a propagating disturbance is important for a number of applications. A nonstationary cross-spectral density phase (NCSDP) technique was developed to provide a statistical estimate of the propagation time of sharp discontinuities such as steps or spikes that model shock or detonation waves. The uncertainty of the phase estimate is dependent on the coherence between the signals. For discrete implementation of the NCSDP technique, a ??weighted-resetting-unwrap?? of the phase angle was proposed to discard values of the coherence below a threshold value, that is, only the unwrapped phase angle above the threshold was accepted. In addition, an envelop function was used which improved the technique. The technique was found to be unsuitable for step disturbances but was more effective in estimating the time delay with a small standard deviation if the sharp disturbance also showed a rapid decay. The method was applied to shock and detonation waves.

Published in:

Signal Processing, IEEE Transactions on  (Volume:58 ,  Issue: 5 )

Date of Publication:

May 2010

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.