An energy analysis of the pseudo Wigner-Ville distribution in support of machinery monitoring and diagnostics

Abstract

The Pseudo Wigner-Ville Distribution is a signal transformation of an input time signal into a joint time-frequency domain, that provides an excellent characterization of an input signal as well as its respective energy content. A smoothing window and energy sensitivity analysis of the discretized Pseudo Wigner-Ville Distribution is presented along with a machinery monitoring application using the resulting Wigner-Ville energy of the sampled signal. The ability to apply the Pseudo Wigner-Ville Distribution to both steady-state and transient machinery may enable the monitoring and diagnostics of virtually any piece of equipment.