An automatic abrupt information extraction method based on singular value decomposition and higher-order statistics. (31st December 2015)

• Record Type: Journal Article
• Authors: He, Tian; Ye, Wu; Pan, Qiang; Liu, Xiandong
• Is Part Of: Measurement science & technology. Volume 27:Number 2(2016:Feb.)
• Publication Date: 2015-12-31
• Subjects: singular value decomposition -- abrupt information -- higher-order statistics -- rubbing -- fault diagnosis; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/0957-0233/27/2/025007
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: One key aspect of local fault diagnosis is how to effectively extract abrupt features from the vibration signals. This paper proposes a method to automatically extract abrupt information based on singular value decomposition and higher-order statistics. In order to observe the distribution law of singular values, a numerical analysis to simulate the noise, periodic signal, abrupt signal and singular value distribution is conducted. Based on higher-order statistics and spectrum analysis, a method to automatically choose the upper and lower borders of the singular value interval reflecting the abrupt information is built. And the selected singular values derived from this method are used to reconstruct abrupt signals. It is proven that the method is able to obtain accurate results by processing the rub-impact fault signal measured from the experiments. The analytical and experimental results indicate that the proposed method is feasible for automatically extracting abrupt information caused by faults like the rotor–stator rub-impact.