KUANG Gui-lan, WANG Dao-bon, WU Wei-li, et al. Application of fractional Fourier transform in one turbine-shaft engine surge analyse[J]. 2009, 24(8).DOI:
The article constructed signal to simulate the fractional Fourier transform(FRFT)'s characteristics of time-frequency analysis and validated that FRFT can relieve time and frequency coupling effectively.Then
typical surge experiment data of a turbine-shaft engine were processed using FRFT in order to pick up surge characteristic signal.With the FRFT energy spectrum of the surge characteristic signal
we evaluated the instantaneous surge frequency.The results show that using the characteristics of FRFT's energy congregation in the rotary angle
which matches with the engine surge's peculiarity
helps pick up the engine's surge characteristics signal effectively;using the FRFT energy spectrum helps estimate the instantaneous surge frequency.