The Application of Coupled Three Order Cumulants’ Differential Feature in Fault Diagnosis

Wen-bing Wu, Jin-zhi Xiong, Yupeng Wu, Rihua Liu
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引用次数: 1

Abstract

Complex three-order cumulant has different definition forms. Different forms conclude different information. For studying the effection of frequency in the coupled signals to fault diagnosis, the differential method to the three order cumulants of coupled signals is adopted. By using the differential of complex three order cumulants before and after respectively, then their  dimensional spectrum is calculated, and the results are used to fault diagnosis. The experimental results show that, the increase frequency item in three order cumulants after differentiated impacts on the results of fault diagnosis and the degree of effection is relative to the differential times. And the correct rate of fault diagnosis can be raised by changing the differential times of three order cumulants.
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耦合三阶累积量微分特征在故障诊断中的应用
复三阶累积量有不同的定义形式。不同的形式得出不同的信息。为了研究耦合信号中的频率对故障诊断的影响,采用了耦合信号三阶累积量的微分方法。利用复三阶累积量前后的微分,计算了它们的维谱,并将结果用于故障诊断。实验结果表明,三阶累积量中微分后的增频项对故障诊断结果有影响,其影响程度与微分次数有关。通过改变三阶累积量的微分次数,可以提高故障诊断的正确率。
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