Ridge and Phase Identification in the Frequency Analysis of Transient Signals by Harmonic Wavelets

[+] Author and Article Information
D. E. Newland

Engineering Department, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, England

J. Vib. Acoust 121(2), 149-155 (Apr 01, 1999) (7 pages) doi:10.1115/1.2893957 History: Received August 01, 1997; Revised September 01, 1998; Online February 26, 2008


It is difficult to generate high-definition time-frequency maps for rapidly changing transient signals. New details of the theory of harmonic wavelet analysis are described which provide the basis for computational algorithms designed to improve map definition. Features of these algorithms include the use of ridge identification and phase gradient as diagnostic features.

Copyright © 1999 by The American Society of Mechanical Engineers
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