复数三阶累量具有不同的定义形式,定义形式不同,其耦合性质也不相同,则由其产生的复数累量切片也包含了信号间不同的耦合信息,实验中利用这些不同的定义方式,对特定的故障信号和正常信号同时采用相同的耦合方式进行故障判别。同时定义了复数三阶累量切片谱,通过切片谱对正常信号和故障信号的耦合特征进行了分析。实验结果表明,随着耦合方式的不同,同一故障的诊断正确率也不相同,从而为特定的故障判别提供了一种可供选择的方法。Complex third-order cumulant has different definition forms.Different forms have different coupling properties, and the generated complex cumulants slices contain different coupling information of signals.In experiments, using the different definitions, the same coupling method is applied to both specific fault signals and normal signals.Furthermore, complex third-order cumulant slices spectrum is defined, and it is used to analyse the coupling features of normal signals and fault signals.Experiments indicate, the detection accuracy rate on the same fault are not the same with the different coupling methods, thus, it provides an alternative method to diagnose the specific fault.国家自然科学基金(No.50975098); 福建省教育厅A类科技项目(No.JA11342
