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中文摘要：
Wigner高阶谱作为分析非高斯信号的重要工具,其实现了时域和频域的同时分析,能有效提取信号的非线性特性。但常规Wigner高阶谱以单通道信号为研究对象,不能全面反映转子的特征信息,并且基于同一截面不同通道信号的分析结果也会不一致。为解决这个问题,以全矢谱技术为基础,对同源双通道信息进行融合,给出了一种矢Wigner三谱切片分析方法,并完成了仿真分析,通过齿轮故障实例验证了所给出方法的有效性,为转子特征提取和故障诊断提供了一种可用方法。
英文摘要：
As a key tool for analysis of non-gaussian signals,wigner higher-order spectrum can achieve analysis from both the time domain and the frequency domain simultaneously,which extracts signals＇ nonlinear features effectively. However,general wigner higher-order spectrum is used to take single channel signals as the studied objects,and it cannot embody the characteristics completely,and furthermore the analysis conclusions obtained may be different coming from the two-channel signals at the same cross section. In order to solve this problem,the new method named as vector wigner tri-spectrum slices is proposed based on the full vector-spectrum analysis method,which fuses homologous information with two channels. The simulation and the experiment of gear fault diagnosis are studied. Good effectiveness of this proposed method is verified,and it also provides an available method to feature extraction and fault diagnosis of rotors.
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