基于SVD降噪法对齿轮点蚀故障特征的试验及分析  

Test Research Ofthe Fault Characteristics of Pitting Gear Based on the SVD Noise Reduction Method

作　　者：周新涛[1] 崔亚辉[1] 马娜[1] 刘夏移 李龙龙 ZHOU Xintao;CUI Yahui;MA Na;LIU Xiayi;LI Longlong(School of Machinery and Precision Instrument Engineering, Xi'an University of Technology, Xi1 an 710048 , China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《机械设计与研究》2019年第2期74-78,82,共6页Machine Design And Research

基　　金：国家自然科学基金(51175419);陕西省教育厅专项科研计划(17JK1061)资助项目

摘　　要：根据奇异值分解法(SVD)的基本原理,采用数值模拟分析法验证了SVD法在信号处理上具有良好的降噪效果。再利用该法对齿面点蚀故障振动试验数据进行了奇异值和奇异值差分谱计算,得出了真实信号与噪音信号的相空间及真实信号的重构阶数,并对真实信号进行重构,得出了经降噪后真实振动情况的时域信号。在此基础上,将真实振动加速度信号进行FFT变换,得出了齿轮箱上各测点处的频响特性;最后,分别研究了转速、载荷与齿轮箱振动频响特性之间的变化关系,得出了输出轴的振动特性对转速或载荷的波动情况较为敏感。According to the basic principle of singular value decomposition ( SVD), the SVD has good noise reduction effect is verified in signal processing by the numerical simulation method. Using this method to calculate the singular value and singular value difference spectrum of tooth surface point erosion fault vibration test data, the phase space of real signal and noise signal and the reconstruction order of real signal are obtained, and then the real signal is reconstructed. The time domain signal of real vibration after noise reduction is acquired. On the basis of this, FFT transformation of the real vibration acceleration signal is carried out, and the frequency response characteristics of each measuring point on the gearbox are got. Finally, the relationship between the speed , load and the vibration frequency response of the gearbox is studied, and the vibration characteristics of the output shaft are sensitive to the fluctuation of the speed or load.

关 键 词：奇异值分解 齿面点蚀 故障 振动 载荷 

分 类 号：TH113.1[机械工程—机械设计及理论] TB535[理学—物理]