基于Teager能量算子的滚动轴承故障诊断研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 1-5,85.

论文

基于Teager能量算子的滚动轴承故障诊断研究

王天金1; 冯志鹏1; 郝如江2; 褚福磊3

作者信息 +

Fault diagnosis of rolling element bearings based on teager energy operator

WANG Tian-jin1; FENG Zhi-peng1; HAO Ru-jiang2; CHU Fu-lei3

Author information +

文章历史 +

摘要

周期性冲击是判断滚动轴承局部损伤故障的关键特征，如何提取周期性冲击及其重复频率是轴承故障诊断中的关键问题。Teager能量算子能够估计产生信号所需的总机械能，对信号的瞬态变化具有良好的时间分辨率和自适应能力，在检测信号冲击特征方面具有独特优势。为了提取滚动轴承故障的特征频率，针对滚动轴承故障振动信号中的瞬态冲击特点，提出了基于Teager能量算子的频谱分析方法，利用Teager能量算子提取轴承故障引起的周期性冲击，通过瞬时Teager能量的Fourier频谱识别轴承的故障特征频率。分析了滚动轴承故障仿真信号和实验测试信号，并和包络谱方法进行了对比分析，准确诊断了滚动轴承元件故障，验证了该方法的有效性

Abstract

Periodic impulse is a key feature to diagnose the faults of rolling element bearings, and the extraction of periodic impulse and the identification of its repeating frequency is an important issue. Teager energy operator tracks the source energy (total mechanical energy) generating a signal. It has a fine time resolution and a good adaptability to instantaneous changes in a signal, and thus has unique advantage in detecting impulses in a signal. With regards to the impulse feature of faulty bearing vibration signals, a new method called Teager energy spectrum is proposed to identify the characteristic frequency of bearing faults. It uses Teager energy operator to detect periodic impulse characteristic of bearing localized damage, and then identify the characteristic frequency of bearing faults by means of Fourier transform of the instantaneous Teager energy. The effectiveness of the proposed method is validated by the analyses of both a simulated faulty bearing vibration signal and the experimental data of bearing faults, and the comparison study with envelope spectrum.

导出引用

王天金;冯志鹏;郝如江;褚福磊. 基于Teager能量算子的滚动轴承故障诊断研究[J]. 振动与冲击, 2012, 31(2): 1-5,85

WANG Tian-jin;FENG Zhi-peng;HAO Ru-jiang;CHU Fu-lei. Fault diagnosis of rolling element bearings based on teager energy operator[J]. Journal of Vibration and Shock, 2012, 31(2): 1-5,85