基于时频-小波分析的压气机失速先兆研究

Study on Stall Inception in Compressor Based on Time-frequency and Wavelet Analysis

采用时频-小波分析法对某型发动机的八级轴流压气机级间压力信号的失速先兆及发展信息进行了分析,检验了失速时刻信号的奇异值。结果表明,在失速前的阶段,不同的频率段表现出不同的失速先兆成分。

Stall inception and development have been studied using the method of time-frequency and wavelet analysis on the pressure signal from an eight-stage compressor engine. Also inspected is the singularity of stall signal. Results sh ow that different frequency implies different stall inception before the stall s tage.