运用EMD分形盒维数的电梯机械故障诊断  

Application of EMD and Box Dimension in Fault Diagnosis of Elevator Machinery

作　　者：陈建灿[1] 刘晓梅[1] 

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2013年第5期494-499,共6页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(50975098);福建省自然科学基金资助项目(2012J01213)

摘　　要：针对电梯机械故障的诊断,提出经验模态分解(EMD)和分形盒维数的诊断方法.利用EMD对电梯正常运行和各故障工况时的加速度信号按频率高低依次分解,得到分解后的固有模态函数(IMF).通过信号重组得到去除背景信号和噪声后的振动信号,再利用分形盒维数计算其重组信号和各分量IMF的盒维数.实验计算表明:各工况的盒维数具有良好有效的区分度和区间范围.For the elevator machinery fault diagnosis, a method of empirical mode decomposition （EMD） and box dimen- sion is presented in this paper. It uses EMD to decompose the acceleration signals of normal and failure conditions of the elevator, and the component IMF is gained. Through the recombination of signals, the vibration signals after removing the background signals and noise are obtained, and then uses the box dimension to calculate the signals and the component IMF.＂ Experimental results show that, the box dimension under normal and failure conditions have good effective discrimi- nations and ranges.

关 键 词：电梯 经验模态分解 盒维数 故障诊断 

分 类 号：TH211.6[机械工程—机械制造及自动化] TH165.3