A method extracting fault features of gear teeth fractures based on an auditory modeland probability density of extreme points

被引：0
作者：
Wu W. [1 ]
Li Y. [1 ]
Wang B. [1 ]
Li G. [1 ]
Shi Y. [1 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2016年 / 35卷 / 19期
关键词：
Auditory model; Fault diagnosis; Feature extraction; Gear teeth fracture fault; Probability density; Transient signals;
D O I：
10.13465/j.cnki.jvs.2016.19.017
中图分类号：
学科分类号：
摘要：
The collision and impact at gear teeth fractures are the most important features in meshing process of gear pairs. Considering a human auditory system has an instinctive response to sudden transient acoustic signals, in order to extract transient impulse response components induced by gear teeth fracture faults, a method extracting fault features of gear teeth fractures based on an auditory model and signal probability density of extreme points was proposed. Firstly, band-pass filtering with Gammatone filters, phase adjustment and extreme points extraction for signals were conducted, and then the amplitude probability densities of extreme points were calculated, their derivatives were used to judge if there are transient impact components in all filtered signals. Those extreme points with transient impact components were extracted. Meanwhile, the whole system vibration might produce extreme points being irrelevant to gear teeth fracture impacts. In order to accurately extract impacts of gear teeth fractures, according to transient signals' frequency band continuity and multi-band distribution characteristics, an appropriate extraction method was designed. The real measured signals showed that the proposed method can accurately extract fault features of gear teeth fractures, and can extract impact components only induced by gear teeth fracture faults in a variety of transient impulse response components, and the extraction accuracy is higher. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：101 / 106
页数：5
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