MCKD-循环域解调方法在齿轮箱故障诊断中的应用  

Application of MCKD-cyclic Domain Demodulation Method in Gearbox Fault Diagnosis

作　　者：王志坚[1] 王俊元[1] 曾志强[1] 张纪平[1] 

机构地区：[1]中北大学机械与动力工程学院,山西太原030051

出　　处：《机械传动》2017年第1期183-188,共6页Journal of Mechanical Transmission

摘　　要：多调制源、多载波信号的循环自相关解调分析存在交叉项的干扰,这使循环自相关解调方法的实际应用产生局限性。提出了基于最大相关峭度反褶积(Maximum correlated Kurtosis deconvolution,MCKD)和循环自相关解调方法相结合的齿轮箱故障诊断方法,先通过MCKD对原信号降噪以便提取感兴趣的周期成分,再对降噪后的周期信号进行循环自相关解调分析,此方法有效地抑制了多调制源、多载波对循环平稳结果带来的交叉项干扰,提高了分析的可靠性。将该方法运用于齿轮箱故障诊断中,成功地从振动信号中分离出故障源。The cross - term interference caused by multi - modulator and multi - carrier makes it limited the use of the cyclic autocorrelation demodulation. A new method called the MCKD （ Maximum correlated Kur- tosis Deconvolution） -cyclic domain demodulation is proposed. Firstly, the strong background noise of the o- riginal signal is decreased by the MCKD method in order to extract the interest period component, the above giv- en signal is processed by the cyclic autocorrelation function demodulation. The new method can decrease the cross - term interference caused by multi - modulator and multi - carrier and improve the reliability of the analy- sis. As the application of the MCKD - cyclic domain demodulation theory in fault diagnosis, the method is used to extract fault feature from vibration signals successfully.

关 键 词：MCKD 循环自相关解调 故障诊断 周期信号 

分 类 号：TH132.41[机械工程—机械制造及自动化]