Patent ID: 6801873
Filing Date: 2004-10-05
Classification: G01P

Abstract:
A method for analyzing a physical system having a rotating element, the method comprising:receiving a tachometer signal from a tachometer, wherein the tachometer signal comprises rotation speed information for the rotating element; determining a time sequence using the tachometer signal, wherein the time sequence comprises time values for the rotating element at substantially equal angle increments; applying a first digital interpolation filter to the time sequence to generate a modified time sequence; receiving a digital data signal, wherein the digital data signal comprises a second plurality of samples, and wherein the digital data signal comprises data for the rotating element at substantially equal time increments; applying a second digital interpolation filter to the digital data signal to generate a modified data signal; re-sampling the modified data signal using the modified time sequence to generate an angle domain data signal, wherein the angle domain data signal comprises data signal values at substantially equal angle increments, and wherein the angle domain data signal is usable to analyze the physical system.