Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《China Mechanical Engineering》 2016-19
Add to Favorite Get Latest Update

Morphological Filtering Method for Vibration Signals of Hydraulic Pump under Sinusoidal Variable Load Conditions

Liu Siyuan;Yang Mengxue;Wang Chuang;Zhang Wenwen;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University;Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University),Ministry of Education of China;  
Vibration characteristics of the pump vibration signals would change when they suffered a significant variable loads,especially in the role of sinusoidal load changes,and would produce amplitude modulation phenomenon.The filtering effects of the traditional single-scale structure element morphological methods was not necessarily ideal to this kind of signals.Therefore,for vibration signal characteristics of sinusoidal load pump,on the basis of the single-scale morphological analysis,a multi-scale morphological filtering method was proposed,which took both of length and height scale of the morphological structure elements.Firstly,taking the impact feature ratio and second geometric moment as characteristic index,then,the optimization method of structural elements length scale and height scale was proposed,which determined the optimal length and height scale operator combination.Afterwards,filtering the sinusoidal load simulation signals and variable load hydraulic pump failure vibration signals using the optimal scale combination,the results confirm that the filtering effectiveness is better than that of single-scale filtering method.
【Fund】: 国家自然科学基金资助项目(51505411);; 国家重点基础研究发展计划(973计划)资助项目(2014CB046405)
【CateGory Index】: TH137.51
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved