Bispectrum analysis transition identification method based on flight test pulsating pressure data

A bispectrum analysis transition identification method based on flight test pulsating pressure data comprises the following steps: S1, filtering instantaneous pressure p measured by a pressure sensor on an aircraft through a moving average method, obtaining average pressure, and obtaining a distribution curve of pulsating pressure of the aircraft in a time domain; S2, dividing a distribution curve of pulsating pressure on a time domain, and intercepting pulsating pressure data in a plurality of delta t time periods, wherein the value range of the delta t is selected according to the sampling frequency; S3, performing bispectrum analysis on the pulsating pressure data in the delta t time period to obtain a pulsating pressure bispectrum value in each delta t time period; and S4, identifying the transition moment of the aircraft according to the pulsating pressure bispectrum values in different time periods. According to the method, the transition moment of the boundary layer of the aircraft in the flight test c