基于盒维数的滚动轴承故障诊断

Rolling Bearing Fault Diagnosis Based on Box Dimension

针对滚动轴承振动信号的特点 ,从分形原理出发 ,利用盒维数的概念 ,对由滚动轴承故障产生的非平稳、非线性信号进行了分形特征的盒维数定量描述。试验结果表明 ,由于滚动轴承不同故障动力学产生的机制不同 ,其盒维数明显不同。

Fractal geometry is a new method to apply in analyzing fault signals. After researching the characteristic of rolling bearings, a new quantificational definition about fault signals of rolling bearings is proposed. Based on fractal theory and the conception of box dimension they can describe both non-stationary and nonlinear signals of vibration signals generated by rolling bearings. Experiment results show that the box dimensions are different in evidence because of the difference of dynamic mechanism . The fault pattern recognitions of rolling bearings are effective and accurate by the new method of box dimension.