Nonstationary vibration signal decomposition based on synchrosqueezing transform and local surrogate methods
HU Yi-ding 1,2, REN Wei-xin3 , YANG Dong3,4
1. School of Civil Engineering, Central South University, Changsha 4100752. School of Information Engineering, WuYi University, Jiangmen, 5290203. School of Civil Engineering, Hefei University of Technology, Hefei 2300094. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105
Engineering vibration signals usually include nonstationary information. Time-Frequency analysis is one of the most popular methods in nonstationary signal processing. Synchrosqueezing transform converts the time-scale plane of wavelet to the time-frequency plane, and improves the time frequency resolution. The surrogate method tests the stationarity in time-frequency plane. Stationarity testing is presented on synchrosqueezing transform time-frequency plane. Based local surrogate method, statistical properties of the amplitude spectra are analyzed, and stationary and nonstationary components are decomposed on the time-frequency plane. While retaining phase spectra of the original signal, the two components in time domain are recovered through inverse synchrosqueezing transform, thereby a method of decomposing a nonstaionary signal into stationary component and nonstationary component is presented. Numerical examples are given to illustrate the efficiency of this method.
胡异丁;任伟新;杨栋;. 基于同步压缩变换和局部替代数据的非平稳振动信号分解方法[J]. , 2013, 32(23): 43-47.
HU Yi-ding;REN Wei-xin;YANG Dong;. Nonstationary vibration signal decomposition based on synchrosqueezing transform and local surrogate methods. , 2013, 32(23): 43-47.
2013, Vol. 32 
