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《Journal of Vibration and Shock》 2011-07
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A new method based on HHT for analyzing dynamic characteristics of a hydraulic cylinder

WANG Xin-qing,LIANG Sheng,XIA Tian,HE Hong-yang,CHEN Liu-hai(PLA University of Science and Technology,Nanjing 210007,China)  
A new method based on HHT to analyze dynamic characteristics of a hydraulic cylinder was proposed.The oil pressure fluctuation signal under periodic excitation was decomposed into IMFs by using EMD.Then,IMFs were classified using the Hilbert marginal spectrum of each IMF and the frequency of the free vibration and forced vibration.The signal was reconstructed after the classification,the free vibration component reflecting the dynamic characteristics of the hydraulic cylinder was extracted.The result showed that the proposed method has good performance to analyze the dynamic characteristics of a hydraulic cylinder,and the free vibration component extraced can be a basis to evaluate the dynamic characteristics of a hydraulic cylinder.
【CateGory Index】: TH137.51
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