Application of fractional Fourier transform in one turbine-shaft engine surge analyse
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Application of fractional Fourier transform in one turbine-shaft engine surge analyse
Vol. 24, Issue 8, (2009)
作者机构:
1. 南京航空航天大学 能源与动力学院,南京,210016
2. 中国航空动力机械研究所测控技术研究室,株洲,412002
3. 南京航空航天大学自动化学院,南京,210016
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Published:2009
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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:
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:
Application of fractional Fourier transform in one turbine-shaft engine surge analyse
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.