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本文对喘振前期的动态信号进行了测量和分析。在喘振非线性增长区域前发现了与后续喘振相关的小扰动区域。并从机理上讨论了这类小扰动出现的原因。采用小波变换等信号分析方法检测到这类小扰动的存在。设计了一种快速捕捉喘振前期小扰动幅频特征的数据处理方法。
In this paper, the dynamic signal of the early surge was measured and analyzed. A small disturbance zone associated with subsequent surge was found before surging the non-linear growth zone. The mechanism of such small disturbance is discussed in principle. Wavelet transform and other signal analysis methods to detect the existence of such small disturbances. A data processing method is proposed to quickly capture the amplitude and frequency characteristics of small perturbations during the early period of surge.