The Application of Cumulants Slices in Fault Diagnosis

Wen-bing Wu
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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 that the detection accuracy rate on the same fault is not the same with the different coupling method, thus, it provides an alternative method to diagnose the specific fault.
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累积切片在故障诊断中的应用
复杂三阶累积量有不同的定义形式。不同的形式具有不同的耦合性质,生成的复累积量切片包含不同的信号耦合信息。在实验中,使用不同的定义,将相同的耦合方法应用于特定的故障信号和正常信号。此外,定义了复三阶累积量片谱,并将其用于分析正常信号和故障信号的耦合特征。实验表明,不同的耦合方法对同一故障的检测准确率不同,为诊断特定故障提供了一种替代方法。
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