基于VMD阶比跟踪的变转速齿轮箱齿轮故障特征提取  

FAULT FEATURE EXTRACTION OF VIRIABLE RORATION SPEED GEARBOX GEAR BASED ON VMD AND ORDER TRACKING

作　　者：迭旭鹏 康建设 池阔 DIE XuPeng;KANG JianShe;CHI Kuo(Department of Management Engineering,Army Engineering University of PLA,Shijiangzhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区装备指挥与管理系,石家庄050003

出　　处：《机械强度》2020年第5期1051-1058,共8页Journal of Mechanical Strength

摘　　要：针对变转速工况下齿轮箱齿轮阶比信号互相干扰故障特征难以提取的问题,提出了基于VMD(Variational Mode Decomposition)和阶比跟踪技术结合的齿轮箱齿轮故障特征提取方法。该方法通过计算阶比跟踪技术对振动信号进行角域重采样;获得重采样信号后,利用VMD按照中心阶比不同,自适应地将重采样信号分解,再利用峭度准则从IMF(Intrinsic Mode Function)分量中选取出故障信号;最后对故障信号进行快速谱峭图处理和滤波平方包络解调。通过变转速下齿轮箱的齿轮故障试验和对比分析,表明该方法能有效提取出变转速下齿轮箱的齿轮故障特征,且降噪效果明显,特征突出,适用于变转速齿轮箱的齿轮故障特征提取。It is difficult to extract the fault features of gearbox gears under the condition of variable rotation speed,because of the order signals interfere with each other.To solve this problem,a fault feature extraction method for gearbox gears based on VMD(Variational Mode Decomposition)and order tracking technology is proposed.The method resamples the vibration signal in angular domain by computed order tracking technology.After obtaining the resampled signal,it would be adaptively decomposed by VMD according to the different center order,and then select the fault signal fron the IMFs(Intrinsic Mode Function)by kurtosis criterion.Finally,the fault signal is processed by the fast kurtogram,filter and squared envelope demodulation.Through the gear fault test and comparative analysis of gearbox at variable rotation speed,it shows that this method can effectively extract the gear fault characteristics of gearbox at variable rotation speed.It has obvious noise reduction effect and clear features,which is suitable for gear fault feature extraction of variable rotation speed gearbox.

关 键 词：变转速 阶比跟踪 变分模态分解 齿轮箱 特征提取 

分 类 号：TH165.3[机械工程—机械制造及自动化]