振动波形的分形判别及特征提取

Fractal Determination and Feature Extraction from Vibration Waveforms

首先给出了寻找振动波形的无标度区的方法，波形在无标度区内可视为无规分形，利用文中的公式可以求得波形的盒维数。振动式的验表明，波形确实存在在无标度区；盒维数为波形的一个重要特征，可以用于对振动状态的分类识别；与频域模在数识别的方法相比较，盒维数方法更简单易行。

A method of locating the non scale region is presented for a complex vibration waveform. In the non scale region, the waveform can be regarded as fractal, and its box dimension can be found out through the formulas given in the paper. Experimental results show that the box dimension as a fractal feature is fitter to classify some waveforms, and simpler computation than FFT.