Time-frequencyrepresentationanalysisinunderwaterexplosiveshockwave

signalsbasedonanimprovedHHTmethod

CHENG Lei; HAN Yan; WANG Jian; DU Juan

doi:10.11883/1001-1455(2011)03-0326-06

Volume 31 Issue 3

May 2014

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CHENG Lei, HAN Yan, WANG Jian, DU Juan. Time-frequencyrepresentationanalysisinunderwaterexplosiveshockwavesignalsbasedonanimprovedHHTmethod[J]. Explosion And Shock Waves, 2011, 31(3): 326-331. doi: 10.11883/1001-1455(2011)03-0326-06

Citation:

CHENG Lei, HAN Yan, WANG Jian, DU Juan. Time-frequencyrepresentationanalysisinunderwaterexplosiveshockwave signalsbasedonanimprovedHHTmethod[J]. Explosion And Shock Waves, 2011, 31(3): 326-331. doi: 10.11883/1001-1455(2011)03-0326-06

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Time-frequencyrepresentationanalysisinunderwaterexplosiveshockwave signalsbasedonanimprovedHHTmethod

doi: 10.11883/1001-1455(2011)03-0326-06

1.
NationalKeylaboratoryofElectronicTesting,NorthUniversityofChina,

Publish Date: 2011-05-25

Abstract

Abstract

Basedonthecharactersofunderwaterexplosionshockwaves,animprovedHilbert-Huang transform (HHT)methodwasproposedbytakingtheadvantageofHHTinprocessingnon-stationarysignalsandcombiningwaveletdecompositionandcorrelationcoefficientfiltering. Intheimproved HHT method,firstsignalsaredividedintohigh-frequencysignalsandlow-frequencysignalsbywaveletdecomposition, andthenintrinsicmodefunction(IMF)componentsarefilteredbycorrelationcoefficients. Resultsshowthattheimproved HHT methodcanbeappliedtoeffectivelyanalyzethe time-frequencyinformationofunderwaterexplosionshockwavesignals.
- mechanicsofexplosion,
- improvedHHT,
- time-frequencyrepresentation