流体机械2012，Vol.40Issue(1)：10-12,3.DOI:10.3969/j.issn.1005-0329.2012.01.003
用HHT变换处理离心压缩机喘振试验数据
Centrifugal Compressor Surge Data Processing Based on HHT Transforms
摘要
Abstract
To extract centrifugal compressor early surge characteristic frequency, the Hilbert-Huang transform (HHT) method is applied to extract signal character after wavelet packet denoising and signal sampling. The empirical mode decomposition (EMD) was used to decompose the signal into a number of intrinsic mode functions (IMFs). Using the correlation coefficient of the IMF and the undecomposed signal filters the useful component. The vibration of centrifugal compressor is mainly caused by decreasing flow through comparing original signal to trend. Finally, the effective items are transformed to Hilbert marginal spectrum and extracted surge frequency is 7. 3Hz.关键词
离心压缩机/Hilbert-Huang变换/喘振Key words
centrifugal compressor/Hilbert-Huang transform/surge分类
机械制造引用本文复制引用
张勇,张春梅..用HHT变换处理离心压缩机喘振试验数据[J].流体机械,2012,40(1):10-12,3.
