鍵合過程中換能系統(tǒng)振動(dòng)的關(guān)聯(lián)維數(shù)和Lyapunov指數(shù)實(shí)驗(yàn)研究.pdf

1、中南大學(xué)碩士學(xué)位論文鍵合過程中換能系統(tǒng)振動(dòng)的關(guān)聯(lián)維數(shù)和Lyapunov指數(shù)實(shí)驗(yàn)研究姓名：呂雷申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械電子工程指導(dǎo)教師：韓雷20090606中南大學(xué)碩十學(xué)位論文ABSTRACTThispaperiSaboutthestudyofthevibrationcharacteristicoftheultrasonictransducersystemofthealuminumwirebondingatdifferentpress

2、uresThevibrationsignaloftheultrasonictransducerwerecollectedbyPSV400—M2LaserDopplerVelometerandthebondingstrengthwasevaluatedbytheDAGE4000MachineThevibrationsignalwasanalyzedbythenonlinearvibrationtheoryandtherelationshi

3、pbetweenthenonlinearstatisticsandthebondingstrengthwasestablished1Thewaveletanalysiswasusedtoanalyzethevibrationsignalofthetransducersystemandtheeffectsofthebondingpressuresonthedifferentbandcomposition2Themechanismofthe

4、surrogatedatamethodwasexplainedandthismethodwasidentifiedthenonlinearcharacteristicofthevibrationtimeseries，whichcomefromthehornvibrationofthetransducerandthehorizontalandtangentialvibrationofthebondingtoolbottom3Thenonl

5、ineardynamicmethodwasusedtoanalysisthevibrationcharacteristicoftheultrasonictransducersystemThecorrelationdimensionofthevibrationtimeserieswasutilizedtomonitorthevibrationcomplexityofthetransducersysteminthebondingandthe

6、largeLyapunovexponenttodetectwhetherthevelocitysignalcontainsthemutationandifhavehowmuchthemutationiSAndwecouldmonitorthebondingstrengthbythelargeLyapunovexponentandthevelocityRMSofthevibrationsignaloftheultrasonictransd