李宏坤   

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Language:English

Paper Publications

Title of Paper:利用粒子滤波与谱峭度的滚动轴承故障诊断

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Date of Publication:2016-10-25

Journal:机械工程学报

Included Journals:EI、CSCD、Scopus

Volume:53

Issue:3

Page Number:63-72

ISSN No.:0577-6686

Key Words:滚动轴承;状态空间;粒子滤波;谱峭度

Abstract:针对快速谱峭度在低信噪比情况下分析效果差的问题,提出应用粒子滤波的前处理降噪方法来提高信噪比,从而解决谱峭度受噪声干扰效果差的问题,进而提高滚动轴承故障诊断的成功率.建立振动信号的状态方程,提取原始信号的背景噪声,将其与状态方程之和作为观测方程.联立状态方程与观测方程来建立状态空间模型.采用粒子滤波对信号重新估计,得到新序列即是降噪之后的信号,结合快速谱峭度方法,获取最佳分析频带.并结合频谱分析得出故障频率.对比快速谱峭度与经验模式分解(Empirical mode decomposition,EMD)方法降噪的谱峭度分析诊断结果,证明所提方法的有效性.

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