关键词: 复数三阶累量切片, 耦合, 故障诊断, 切片谱

Abstract: 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.

Key words: complex third-order cumulant slices, coupling, fault diagnosis, spectrum of slices