Patent ID: 6453273
Filing Date: 2002-09-17
Classification: G01H

Abstract:
A system for analyzing the operation of a rotating apparatus in a mechanical system, the system comprising:an input for receiving samples of an input signal, wherein the input signal is acquired from the mechanical system containing the rotating apparatus, wherein the input signal is sampled in time, wherein the input signal comprises a plurality of order components; a processor coupled to the input; a memory medium coupled to the processor which stores analysis software; wherein the processor is operable to execute the analysis software to: perform an invertible joint time-frequency transform on the input signal to produce a first array of coefficients which depend on time and frequency; generate a modified array of coefficients from the first array of coefficients, wherein the modified array of coefficients corresponds to a desired subset of the plurality of order components; and generate a time domain signal from the modified array of coefficients; and a presentation device coupled to the processor which is operable to present the time domain signal to a user; wherein the time domain signal is useable in analyzing operation of the rotating apparatus in the mechanical system.