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Article type: Research Article
Authors: Shin, Young S.; | Jeon, Jae-Jin
Affiliations: Department of Mechanical Engineering, Naval Postgraduate School, Monterey, CA 93943
Note: [] This article is a US Government work, and as such, is in the public domain in the United States of America.
Abstract: Machinery operating in a nonstationary mode generates a signature that at each instant of time has a distinct frequency. A Time-frequency domain representation is needed to characterize such a signature. Pseudo Wigner-Ville distribution is ideally suited for portraying a nonstationary signal in the time-frequency domain and is carried out by adapting the fast Fourier transform algorithm. The important parameters affecting the pseudo Wigner-Ville distribution are discussed and sensitivity analyses are also performed. Practical examples of an actual transient signal are used to illustrate its dynamic features jointly in time and frequency.
DOI: 10.3233/SAV-1993-1109
Journal: Shock and Vibration, vol. 1, no. 1, pp. 65-76, 1993
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