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Analysis method investigation of axial compressor stall signal based on Hilbert-Huang transform and wavelet transform
Author(s): 
Pages: 1-5
Year: Issue:  5
Journal: Gas Turbine Experiment and Research

Keyword:  压气机失速信号失速先兆希尔伯特-黄变换小波变换方差分析时频分析;
Abstract: 针对多级跨声速压气机失速过程壁面静压测量数据,分别采用希尔伯特-黄变换(HHT)和小波分析方法进行时频分析.相比于小波分析方法,HHT时频图中失速过程的频率特征变化更为明显,且利用HHT图中失速发生后的特征频率可判断出失速团的旋转速度.结合方差分析,进一步探索了获取失速先兆信号的可行性.结果表明,两种方法均可用于压气机失速先兆预测,其中HHT方法能够提供更高层次的分解信号,得到的失速先兆更为提前.
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