正弦加载液压泵故障振动信号的阶比多尺度形态滤波方法研究  

Order Ratio Multiscale Morphological Filtering Method of Fault Vibration Signal for Hydraulic Pump Under Sinusoidal Loading Condition

作　　者：孙红梅[1] 刘思远[2,3] 何跃 李晓明 杨梦雪[2,3] SUN Hong-mei;LIU Si-yuan;HE Yue;LI Xiao-ming;YANG Meng-xue(Beijing Polytechnic,Beijing 100176;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University,Qinhuangdao,Hebei 066004;MOE Key Laboratory of Advanced Forging&Stamping Technology and Science, Yanshan University,Qinhuangdao,Hebei 066004)

机构地区：[1]北京电子科技职业学院,北京100176 [2]燕山大学河北省重型机械流体动力传输与控制重点实验室,河北秦皇岛066004 [3]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004

出　　处：《液压与气动》2018年第5期41-46,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51505411);国家重点基础研究发展计划(973计划)(2014CB046405)

摘　　要：液压泵在变载荷作用下会引起转速波动且发生幅值调制现象,振动信号呈现出明显的非平稳性,传统的滤波方法难于进行有效滤波。针对正弦加载液压泵故障振动信号提出一种阶比多尺度形态滤波方法,利用基于EEMD理论的时频阶比分析方法将正弦加载液压泵故障振动非平稳信号转化成角域平稳信号,再用多尺度形态滤波方法对角域平稳信号进行多尺度寻优和解调处理获得多尺度解调信号,并进行阶次谱分析得到振动信号的特征阶次。通过实验证实,该方法能对正弦加载液压泵故障振动信号进行有效滤波,且能提取出更多的有用故障信息。When a hydraulic pump is subjected to a variable load,it will cause speed fluctuation and amplitude modulation,and the vibration signal shows obvious non-stationary.Traditional filtering methods are difficult to effectively filter.An order ratio multiscale morphological filtering method is proposed for fault vibration signal of hydraulic pump under sinusoidal loading condition.The time-frequency order analysis method based on the EEMD theory is used to transform faulty vibration non-stationary signal of sinusoidal loading hydraulic pump into angular stationary signal.The multiscale morphological filtering method is used to obtain multiscale demodulated signals by multiscale optimization and demodulation of angular stationary signals.And the order spectrum analysis is performed to obtain the characteristic order of vibration signal.The experimental results show that this method can effectively filter the fault vibration signal of sinusoidal loading hydraulic pump and can extract more useful fault information.

关 键 词：轴向柱塞泵 正弦加载 振动信号 阶比多尺度形态滤波 特征提取 

分 类 号：TH137[机械工程—机械制造及自动化]