基于LABVIEW的振动噪声测试和分析系统开发

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1、v1404962分类号：UDC：密级：学校代号：10150学号：20052049峡建交通戈挚硕士学位论文基于LabVIEW的振动噪声测试和分析系统开发TheDevelopmentofTest＆AnalysisSystemofVibrationNoiseBasedonLabVIEW学生姓名：导师及职称：学科门类：专业名称：研究方向：申请学位级别：论文答辩日期：学位授予单位：蒋吴黄彬副教授工学机械电子工程仪器仪表与传感器的智能化技术硕士2008年6月3日大连交通大学大连交通大学工学硕十学位论文AbstractAlongwiththedevelopme

2、ntofthecomputerscienceandsoftwaretechnology，virtualinstrumentisbecomingthefocusoftheresearchinmodemtestandcontroltechnology．Itisthetrendforthetechnologyoftestandcontrolinstruments．Tomeettheneedsofthemodernization，toincreasethetestingprecision，avibrationnoisesignaltestingandan

3、alysissystembasedontheLabVIEWsoftwareplatformwhichCanbewidelyusedisdevelopedinthispaper．Thesystemisconsistofthreeparts：thesignalacquiringandadjustingmodule，time-frequencyanalysismoduleanddatastorageandmanagemodule．Thetime—frequencyanalysismoduleistheemphasis，whichCanachieveth

4、efollowingfunctions：waveletsde—noisingtothesignals，theextractingtothetime—frequencysignalEigenvalues，spectrumanalysis，cepstnunanalysisandtime—frequencyanalysis．Allofthesewillbeillustratedindetailbyusingthepracticalapplicationsystemfornl—-thevibrationnoisetestinganalysissystem

5、ofrollingwheelchair．ThesimulatedwheelchairworkingontheHT一9340wheelchairdynamicdurabilitytesteristakenastheresearchobjectinpracticaltestinganalysisofthispaper．Byusingpastedstraingagesandelectretmicrophonetoacquirethevibrationnoisesignalofthemovingwheel-chairseparately，combinin

6、gthetechnologyofdigitalsignalprocessingandwaveletanalysisasanexpansiontotheinitialbuiltvibration&noisetestingandanalyzingsystem，aspecificapplicationobjectorientedvibrationnoisetestinganalysissystemisbuilt．ItnotonlyhasasignaJacquisitionandstoragefunctiontotheoriginalsysteminth

7、isexperimentplatform，butalsohasafunctionthatCanmonitortheworkingstatusofthewheel-chairandcontroltheworkoftheexperimentplatform．AndthisCanmakeunmanneddurabilitytestmonitorpossible．Moreover，thepracticaltestingsystemofthestatusmonitoringofthesimulatedworkingwheel—chairistakenasa

8、nexampleinthispapertodiscussthetime·frequencyanalysistheoryofthevibr