Wigner分布算法及其在轴承故障诊断中应用

ALGORITHM FOR WIGNER DISTRIBUTION AND APPLICATION IN ROLL BEARING DIAGNOSIS

本文根据非平稳带通信号的特点,改进了Classen的Wigner分布算法,克服由离散计算引起的混叠问题.应用三维、二维Wigner分布图对轴承故障进行特征分析,并且研究结果在实例分析中显示出一些优越性.

Based on the features of nonstationary and bandpass signal, the Classen's algorithm for Wigner distribution is improved in this paper, which can avoid the problem of aliasing in discrete calculation. The improved algorithm is easy, and it is adapted for bandpass filtering, moreover its calculating velocity is quite high.,The faults of roll bearing are investigated by 3D-Wigner and 2D-Wigner distribution plot, some advantages are shown in analysing fault characteristics of engineering examples.