基于谱峭度的滚动轴承故障包络阶比跟踪分析

PDF(1337 KB)

振动与冲击 ›› 2012, Vol. 31 ›› Issue (17) : 149-153.

论文

基于谱峭度的滚动轴承故障包络阶比跟踪分析

刘亭伟郭瑜李斌高艳

作者信息 +

Envelope Order Tracking Analysis of Rolling Elements Bearing Faults Based on Spectral Kurtosis

LIU Tingwei-wei , GUO Yu,LI Bing , GAO Yan

Author information +

文章历史 +

摘要

通过对旋转机械变速运行工况的齿轮箱振动分析研究，提出一种基于谱峭度的滚动轴承故障包络阶比跟踪分析方法。该方法利用旋转机械运行过程中滚动轴承故障引起的冲击性振动会激起其周围结构共振的原理，应用谱峭度方法自适应地确定优化的共振解调带通滤波中心频率和滤波带宽，进而通过共振解调算法获得包含轴承故障初始阶段振动特征的包络信号，再将变速工况下的非平稳包络信号通过等角度重采样转化为角度域的准平稳信号，进而获得消除了频率模糊的阶比谱，实现对旋转机械变速运行工况下的滚动轴承故障诊断。仿真和测试试验结果验证了本方法的有效性。

Abstract

Through the research on the gearbox vibration signals at the variable speed conditions of rotating machinery, a method of envelope order tracking analysis of rolling elements bearing faults based on the spectral kurtosis is proposed in this paper. It’s known that the impact vibration produced by rolling elements bearing faults will excite the resonances of its or its surrounding structure. The method proposed in this paper can use the spectral kurtosis algorithm to obtain both the optimal center frequency and bandwidth of the band-pass filter in envelope analysis adaptively. Then the envelope signal that contain the vibration features of the initial stage of the rolling elements bearing faults can be gained. Consequently, the envelope signal is resampled by even-angle sampling, so that the non-stationary signal in time-domain can be turned into a quasi-stationary signal in angle-domain. As a result the frequency smear can be eliminated in order spectrum and the fault diagnosis of rolling elements bearing on the variable speed conditions of rotating machinery is achieved. Simulations and tests verified the feasibility of the proposed method.

导出引用

刘亭伟郭瑜李斌高艳. 基于谱峭度的滚动轴承故障包络阶比跟踪分析[J]. 振动与冲击, 2012, 31(17): 149-153

LIU Tingwei-wei;GUO Yu;LI Bing;GAO Yan . Envelope Order Tracking Analysis of Rolling Elements Bearing Faults Based on Spectral Kurtosis[J]. Journal of Vibration and Shock, 2012, 31(17): 149-153