Firstly, vibration signals are decomposed into several IMFs (intrinsic mode functions), then the Renyi entropy of each IMF is computed and regarded as the input characteristic vectors of LS-SVM for fault classification.

• 该方法先对振动信号进行EMD分解,得到多个基本模式分量(Intrinsic mode function,IMF)后,求出表征故障信息的若干个IMF的Renyi熵,再将其作为特征矢量输入LS-SVM进行故障分类。