... information in the time domain, i.e., transient information of the signal. Thus, time-frequency analysis based on wavelet scalogram and its reassigned scalogram are needed to detect more detailed and comprehensive information and explore the time-frequency characteristics of the rubbing AE. Compared...

... statistical analysis time-frequency analysis vibrations hybrid intelligent method salient features multiple classifier combination compound fault diagnosis 2008 American Society of Mechanical Engineers ...

... or nonstationary signal characteristics. Signal processing tools which exploit these signal components could yield great improvements over traditional spectral analysis. Time-frequency analysis offers the possibility of doing so, and its application to monitoring problems has become an active research area...

...Bao Liu; Sherman Riemenschneider; Zuowei Shen This paper presents a fast adaptive time–frequency analysis method for dealing with the signals consisting of stationary components and transients, which are encountered very often in practice. It is developed based on the short-time Fourier transform...

...Yuji Ohue, Associate Professor,; Akira Yoshida, Professor Mem. ASME, The aim of this study is to propose a new evaluation method of gear dynamics using the continuous and discrete wavelet transforms. The wavelet transform (WT) is a method for the time-frequency analysis of signals. In order...

...Lili Wang; Jinghui Zhang; Chao Wang; Shiyue Hu In the previous paper, a class of nonlinear system is mapped to a so-called skeleton linear model (SLM) based on the joint time-frequency analysis method. Behavior of the nonlinear system may be indicated quantitatively by the variance...

...Lili Wang; Jinghui Zhang; Chao Wang; Shiyue Hu The joint time-frequency analysis method is adopted to study the nonlinear behavior varying with the instantaneous response for a class of S.D.O.F nonlinear system. A time-frequency masking operator, together with the conception of effective time...