中文摘要：

在分析调幅信号Wigner-Ville交叉项分布特征的基础上．提出了使用交叉项“虚互谱能量”诊断调幅型机械故障的新方法，并利用设计的带通核函数，提取交叉项“虚互谱能量”，最后使用具有调幅故障的轴承冲击共振滤波数据，验证了方法在实际应用中的有效性。

英文摘要：

Since the bearing impact faults exhibit the non-stationary characteristics, the diagnostic method of time-frequency distribution is perhaps possessed of advantage. Based on Wigner-Ville cross-term distribution properties of amplitude modulation signal, this paper presents an approach of cross-terms false spectral energy to diagnose machinery faults, and the trans-mission band core function was designed to extract the cross-terms false spectral energy. Finally, the impact experimental data of bearing was given to show the approach availability.