噪声源识别技术的进展-陈心昭

第32卷第5期2009年5月合肥工业大学学报(自然科学版)JOURNALOFHEFEIUNIVERSITYOFTECHNOLOGYVol.32No.5May2009:2008-11-27:(10874037);(50675056);(20060359003):(1939-),,,,.陈心昭(,230009):;;:;;:TB53311:A:1003-5060(2009)05-0609-06ProgressoftechniquesfornoisesourceidentificationCHENXin-zhao(ResearchInstituteofSoundandVibration,HefeiUniversityofTechnology,Hefei230009,China)Abstract:Theessentialprerequisitefornoisecontrolistolocatethenoisesourceswithexactness.Dif-ferentmethodsforidentifyingthenoisesourcesareillustratedinthispaper.Afterbrieflyintroducingthetraditionalanalysismethodsaswellasthecommonmethodsbasedonsignalprocessing,thepapermakesareviewoftheprinciple,specialityandutilityofsomenewtechniquesdevelopedinrecentyears,suchassoundintensitymeasurement,acousticholographyandbeamforming.AlsosummarizedaretheresearchachievementsgainedbytheResearchInstituteofSoundandVibration,HefeiUniver-sityofTechnology,inthisarea.Keywords:noisesourceidentification;soundintensitymeasurement;acousticholography0,,,,,:¹,,,,;º,,,,,,:,1111,,,,,112,,,2,2,113,,,,,,,114,,,,,p-u,,115,,,2211,,,,,212/0,x(t)Rx(S),T2Rx(S)S,Rx(S)0,,Sy],Rx(S)y0,S,,,3311,,,Gxx(f),,,,,,,,,Gxy(f)2,2,,3.2,,,610合肥工业大学学报(自然科学版)第32卷,6,:[1],3132,,x(t)y(t),,x(t)y(t)C2xy(f)2Gxx(f)Gyy(f)Gxy(f)C2xy(f)=0,x(t)y(t),;C2xy(f)=1,,0[C2xy(f)[1,x(t),,fC2xy(f)Gyy(f)Gxx(f),,,,,,3.4,,,C(q)q,Rxx(S)S,(ms)q,;q,Rxx(S),C(q)Gxx(f),,Gxx(f),,,,,,,,,,4-,,,,,,,(STFT),-,-,,,Wigner)Ville(PWVD)(RGKD)-,,,,,;,,/0,,,,[2],2080,,611第5期陈心昭:噪声源识别技术的进展,,,,5656,563025(SoundIntensity)2080,,,,2,,3:(1),,(2),,,,(3),,,[3],,,,,,,()2,2,:(1),,,(2),:+,windows,(3),(4)56,1,3(5)31,EI156,(AcousticalHolography),,,,;(K/2),,,,,,(NAH)2080,,,,,612合肥工业大学学报(自然科学版)第32卷20,NAH,,NAH,:(1),()3:,,,(2),,,,,:Fourier(BEM)Helmholz(HELS)[4](3),,,,,,[5,6](4),,NAHNAH,/0/0,,FFTNAH2,,,,,,,,,NAH)))PatchNAH,,,/0,/0,,[7,8]PatchNAH,2PatchNAH,,,PatchNAH,,PatchNAH,,,,5,42863NVH:(1),,(2),(3),,(4)80,SCI20,EI30(5)/0,,2007(6)17,:,,,;,,(),,()613第5期陈心昭:噪声源识别技术的进展(Beamforming)(),,,,,,,,,,[9],,/0,,NAHBeamforming2,,Beam-forming,NAH,8()(),,,,,/0/0/0()()(),[][1],.[M].:,2008:122-128.[2]ZhengH,LiZ,ChenX.Gearfaultdiagnosisbasedoncon-tinuouswavelettransform[J].MechanicalSystemandSig-nalProcessing,2002,16(2):447-457.[3]GanChangsheng,ChenXinzhao,ChenJian.Scanningpathsforestimatingsoundpowerofnoisesourcesbysoundinten-sityscanningmethod[J].ChineseJournalofAcoustics,1999,18(4):353-359.[4],,,.[J].(),2005,28(9):961-966.[5]BiChuanxing,ChenXinzhao,ZhouRong,etal.Reconstruc-tionandseparationinasem-ifreefieldbyusingthedistribu-tedsourceboundarypointmethod-basednearfieldacousticholography[J].TransactionsoftheASME,JournalofV-ibrationandAcoustics,2007,129(3):323-329.[6]BiChuanxing,ChenXinzhao,ChenJian.Soundfieldsepara-tiontechniquebasedonequivalentsourcemethodanditsapplicationinnearfieldacousticholography[J].JAcoustSocAm,2003,113:1273-1281.[7]WilliamsEG,HoustonBH,HerdicPC.FastFouriertransformandsingularvaluedecompositionformulationsforpatchnear-fieldacousticalholography[J].JAcoustSocAm,2003,114(3):1322-1333.[8],,,.[J].,2008,53(14):1632-1639.[9]CristensenJJ,HaldJ.Beamforming[J].B&KTechnicalReview,2004,(1):1-31.()614合肥工业大学学报(自然科学版)第32卷