S变换在滚动轴承故障诊断上的应用

为了研究滚动轴承信号的非平稳特征，应用时频分析技术是一种较好的选择．研究了S变换，该方法是将短时傅里叶变换同小波变换结合起来发展的一种新算法．对多种时频分析方法进行了比较，得出S变换优于其他方法的一些特点，提出基于S变换的滚动轴承信号瞬态特征检测方法．结果表明，S变换能够以较高时频分辨率表示轴承振动中的非平稳特征，能反映出信号时频谱真实的物理意义，并且计算速度快．诊断结果验证了该方法可以用于滚动轴承的故障诊断．

Application of S-transform in rolling bearing fault diagnosis

To study the unstationary characteristic of rolling bearing signal,using time-frequency method is a good choice. We studied the S-transform,which is a new arithmetic combined with short time Fourier transform and wavelet transform. Many time-frequency methods were applied and the analysis results were compared,then we had the conclusion that the S-transform was better than others in some fields. The S-transform was proposed to analyze the transient character of rolling bearing signal. Experimental result in...