目录摘要.................................................................................................................3Abstract............................................................................................................4第一章绪论......................................................................................................61.1课题研究背景与意义.................................................................................61.2滚动轴承故障诊断方法概述.......................................................................61.3滚动轴承故障诊断技术的国内外研究现状.....................................................61.4本文主要研究内容....................................................................................8第二章滚动轴承的结构特点及振动机理...................................................................92.1引言.......................................................................................................92.2滚动轴承的结构及失效形式.......................................................................92.2.1滚动轴承的结构....................................................................................92.2.2滚动轴承常见失效形式...........................................................................92.3滚动轴承振动信号特点及故障特征频率分析................................................112.3.1滚动轴承振动信号特点.........................................................................112.3.2滚动轴承元件固有频率.........................................................................122.3.3滚动轴承故障特征频率.........................................................................13第三章小波变换基本知识....................................................................................153.1连续小波变换.........................................................................................153.1.1小波变换的基本概念............................................................................153.1.2小波变换的时频分析特征......................................................................153.1.3连续小波变换......................................................................................163.2离散小波变换.........................................................................................173.2.1离散小波的基本概念............................................................................173.2.2离散小波变换的快速算法......................................................................173.3小波包..................................................................................................193.3.1小波包的基本概念及快速算法................................................................19第四章小波函数的应用.......................................................................................224.1常见小波介绍.........................................................................................224.1.1Haar小波..........................................................................................224.1.2Daubechies(dbN)小波.....................................................................224.1.3MexicanHat(mexh)小波...................................................................234.1.4Morlet小波........................................................................................234.1.5Meyer小波...............
