Research of Vibration Signal Detect Technique and Its Application in Fault Diagnosis

摘要

This paper presents a novel approach to detect abnormal transient vibration signal of complex mechanical system. On the basis of alias-free exponential bilinear time-frequency distribution, the new method can avoid the frequency alias and information loss in traditional bilinear distributions; In addition, it can suppression the cross-terms effectively and possess very high time-frequency resolution. Its discrete implementation is introduced and validated by digital simulation and gearbox fault diagnosis experiments.