Method of processing oscillatory data

Abstract

A method of processing oscillatory response data from a resonant system is provided, the method comprising: obtaining data measuring an oscillatory response of the system at a plurality of evenly spaced time intervals; obtaining a plurality of reference frequencies from said data at a plurality of times in said data, each reference frequency preferably being the natural frequency of a mode of the response at the respective time or an estimate of said natural frequency; and transforming said data to an uneven data set having unevenly spaced time intervals by adjusting said evenly spaced time intervals according to the values of said measured reference frequencies. The method can transform non-stationary response data to make it effectively stationary, and thus in a more useful form for further analysis. A method of analysing a resonant system and an apparatus for processing oscillatory response data are also provided.

Dependencies are inferred from the claim text.