On-line diagnosis for cable fault using SSTDR and fourth-order cumulants

The cable fault on-line diagnosis method based on SSTDR may exhibit insufficient noise suppression capability in low signal-to-noise ratio scenarios, thereby increasing the likelihood of misjudgments and constraining its practical utility. In response to this challenge, this study addresses the issue by leveraging noise characteristics, proposing a diagnostic approach that integrates the one-dimensional slice of the fourth-order cumulant with SSTDR, and elucidating the implementation procedure. Through the processing of signals using higher-order cumulants, this method effectively mitigates the impact of noise. Experimental simulations conducted under conditions of high background noise convincingly demonstrate that this methodology enables accurate cable fault diagnosis even in low signal-to-noise ratio scenarios.