基于分形的鋁合金點焊質(zhì)量檢測系統(tǒng)的研究.pdf

1、◎滅畢大孽碩士學位論文學科專業(yè)：材料加工工程作者姓名：史濤指導(dǎo)教師：單平教授ABSTRACTMonitoringandcontroltechniqueforresistancespotweldingqualityisahighefficiencylowcostqualityassuranc宅mcas哪eHoweverthepresentmonitoringsystemmainlyusessingleparametermethodtoid

2、entifythespotweldingqualitywhichidentifiesthequalityaccordingtotheone—byonerelationofthecharacteristicnumberandthequalityparameterinaluminumalloyspotweldingNevertheless，themeasuringmethodusingsingleorlessweldingparameter

3、sisdifficuRtoidentifythequalityofactualnuggetduetotheplentiful婦ctorswhichaffectthespotweldingprocessInordertoovercometheflawofsingleparametermeasuringmethodandfullyutilizethenuggetinformationgainedfromvariousparametersin

4、spotweldingprocess，penmandevelopedthealuminumalloyspotweldingmeasuringsystemusingVirtualInstrumentwhichusesLabVIEWasprogramminglanguageofdataacquiringmodule，andusesfourchannelhigh—speedsynchronizeddataacquisitioncardtosy

5、nchronouslyacquirethecurrent，voltage，electrodedisplaceandsoundsignalsduringaluminumalloyspotweldingThenusenonlinearanalysismethodforthefirsttimetoextracttheBoxdimensionnumberofthesesignals，andutilizefuzzycontrolmethodtof

6、usethedataandidentifythenuggetqualityThesyaemisabletoacquirethecharacteristicsignals，effectivelyreflectthechangeofweldingspotnuggetduringtheweldingprocess，accuratelyidentifythenuggetqualityandsatisfythereal—timemeasuring