Pseudo Wigner-Ville Time-Frequency Distribution and Its Application to Machinery Condition Monitoring
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.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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