轴承早期故障信号的二阶循环平稳分析  

The Second-order Cyclostationary Analysis for Early Fault Signals on Bearing

作　　者：王小卉[1] 李敏[1] 杨洁明[1] 

机构地区：[1]太原理工大学机械电子工程研究所,山西太原030024

出　　处：《太原理工大学学报》2009年第4期418-421,共4页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目(2006011056)

摘　　要：研究了故障轴承振动信号的循环平稳特性,用常见调制信号证实了二阶循环自相关、谱相关密度函数的解调性能。通过实例仿真,在切片分析的基础上,针对多载波多调制源的早期轴承故障信号,提出应用二阶循环切片集合分析法对轴承故障信号进行故障提取,并与谱密度组合切片分析法进行了比较。分析结果表明,切片集合法能快速有效地诊断出轴承的早期故障。In this paper we studied the cyolostationarity of the vibration signal of fault bearing. We used the common modulation signal to prove the demodulation ability of the second-order Cyclic Autocorrelation （CA） and spectral correlation density function（SCDF）. Aimed at multicarrier ＆ multi-modulation fault bearing signal, a slices-gathering method of second-order cyclostationary was proposed and applied to withdraw the bearing fault characteristic. This method was compared with Combination Slice SCD Analysis. The results show that this method can diagnose the bearing fault effectively and quickly.

关 键 词：循环自相关 循环谱密度 故障诊断 轴承 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置]