Short-time difference spectrum analysis method
According to the short-time difference spectrum analysis method, transient components in signals are represented and extracted through time-frequency analysis, firstly, window signals are intercepted through a sliding window, then discrete Fourier transform is carried out on the window signals to ob...
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creator | WANG LEI HE ZHIYI XU XIAOQIANG HU HONGWEI CHEN HEKANG LIAO XIYIN |
description | According to the short-time difference spectrum analysis method, transient components in signals are represented and extracted through time-frequency analysis, firstly, window signals are intercepted through a sliding window, then discrete Fourier transform is carried out on the window signals to obtain a short-time Fourier transform matrix, then a short-time difference spectrum matrix is calculated, and a time-frequency graph of short-time difference spectrum analysis is drawn; and finally, performing short-time Fourier inversion on the short-time difference spectrum matrix, reconstructing a time domain signal of a transient component in the signal, and realizing targeted extraction of the transient component by time-frequency domain filtering. The method can effectively overcome the influence of steady-state harmonic components in engineering signals, depicts transient components caused by defects, improves the detection capability of early anomalies, and has important engineering application value.
短时差谱分析方 |
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subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING HANDLING RECORD CARRIERS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS |
title | Short-time difference spectrum analysis method |
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