Abstract：The relationship between the Gaussian window’s time standard deviation in the continuous time domain and the ability of the STFT amplitude spectrum with Gaussian window to separate order components is established quantitatively according to numerical experiments. The problem with taking the order slices of the STFT amplitude spectrum as the instantaneous amplitude estimates is pointed out. The premises for successful Gabor order waveform reconstruction are examined. An improved flowchart for Gabor order waveform reconstruction, which abandons the try-and-error mode in choosing the analysis parameters, is formulated based on the established relationship between the Gaussian window’s time standard deviation and the ability of the STFT amplitude spectrum to separate order components. Simulation shows that the envelope obtained from the Hilbert transform of the reconstructed order waveform obtained by employing the improved flowchart can be used as a valid instantaneous amplitude estimate.
金阳;郝志勇;郑旭;景国玺. 基于Gabor重构的发动机振声信号阶次分量瞬时幅值的提取[J]. , 2011, 30(9): 15-20.
JIN Yang;HAO Zhi-yong;ZHENG Xu;JING Guo-xi. Extraction of instantaneous amplitude of order components in engine vibroacoustic signals based on gabor-reconstruction. , 2011, 30(9): 15-20.
2011, Vol. 30 
