Application of DHSI Screening Singular Value Components in Gear Fault Diagnosis
In order to effectively remove the noise components in the gear transmission fault signals,a fault diagnosis method based on the differential harmonic significance index(DHSI)for screening singular value components was proposed.In this method,a Hankel matrix was constructed based on the original signal and the constructed matrix was decomposed into the singular values.Then,a new singular value mutation position discrimination index,namely the differential harmonic significance index of singular components,was proposed to screen out the number of the singular values.The signal was reconstructed based on these singular components,and the envelope spectrum of the fault signal was obtained.This method was applied to analyze gear fault simulation signal and the parallel stage gear dropout fault signal of a certain type helicopter transmission system.The comparison of the results of this method with the results of singular value component screening based on singular value difference spectrum show that the singular value component screening based on DHSI can better eliminate the noise and extract fault features in gear vibration signals.
fault diagnosisharmonic significant indexsingular value decompositionharmonic product spectrumgear transmission
万方数据
维普
