Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2004-12-02
2008-09-23
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C702S077000, C073S579000, C073S660000
Reexamination Certificate
active
07428475
ABSTRACT:
A method which permits the transformation of non-stationary response measurements into stationary data for analysis is provided. Many standard analysis techniques, particularly for oscillatory responses, are based on stationary data, and the method allows these techniques to be performed on originally non-stationary data. The method may be a method of processing oscillatory response data from a resonant system including: obtaining data measuring an oscillatory response of the system; estimating the variation in natural frequency of a mode of said response; filtering the data around a selected frequency to obtain a filtered response; determining a carrier signal whose frequency variation with respect to time is equal in magnitude to said estimated variation in natural frequency; and modulating the amplitude of said carrier signal using said filtered response to obtain a modulated carrier signal. A corresponding system for processing oscillatory response data is also provided.
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Bui Bryan
Oliff & Berridg,e PLC
Rolls-Royce PLC
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