Abstract
A new methodology was developed to analyse the post-shock oscillations occurring during pulsetriggered instability. This methodology is comprised of a new time-marching frequency and a timefrequency analysis. With the new time-marching analysis it is possible to follow the evolution of the time-averaged frequency content of the post-shock oscillations throughout a firing. With the timefrequency analysis it is possible to obtain a qualitative estimate of the temporal evolution of the amplitude of the frequency content of post-shock oscillations for a single shock wave. The new methodology was developed and tested using model signals and then successfully applied to a sample experimental signal.
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