Bearing fault signal time-frequency analysis method based on polynomial S-chirplet transformation

Bearing fault signal time-frequency analysis method based on polynomial S-chirplet transformation

The invention discloses a time-frequency analysis method for a bearing fault signal based on polynomial S-chirplet transformation. The time-frequency analysis method comprises the following steps: acquiring a bearing vibration signal to be analyzed; processing the modulation signal based on generali...

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Hauptverfasser: ZHANG QUNLI, REN DEYU, SHI DAFANG, CHEN ZHIJUN, YAO JIANHUA, HUA JIAXIANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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creator ZHANG QUNLI
REN DEYU
SHI DAFANG
CHEN ZHIJUN
YAO JIANHUA
HUA JIAXIANG
description The invention discloses a time-frequency analysis method for a bearing fault signal based on polynomial S-chirplet transformation. The time-frequency analysis method comprises the following steps: acquiring a bearing vibration signal to be analyzed; processing the modulation signal based on generalized S-transform to obtain a preliminary time-frequency analysis result; identifying the ridge line with the current maximum energy; calculating a polynomial coefficient, and calculating a frequency rotation operator and a frequency movement operator by using the coefficient; calculating polynomial chirplet transformation of generalized S transformation based on two operators to obtain an optimized time-frequency analysis result, and extracting by using an adaptive ridge line detection method to obtain a new ridge line; judging the ridge lines extracted twice; and adding all components extracted by the polynomial S-chirplet transform to obtain an instantaneous frequency change diagram, thereby realizing analysis of
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
title Bearing fault signal time-frequency analysis method based on polynomial S-chirplet transformation
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