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Wavelet Decomposition for the Detection and Diagnosis of Faults in Rolling Element Bearings
Discrete Wavelets Transform Discrete Wavelet Packet Transform Ball Bearing Fault Detection
2010/1/15
Condition monitoring and fault diagnosis of equipment and processes are of great concern in industries. Early fault detection in machineries can save millions of dollars in emergency maintenance costs...
滚动轴承摩擦力矩的非线性特征（Nonlinear Characteristic of Rolling Element Bearing Friction Torque）
滚动轴承 摩擦力矩 时间序列
2009/5/22
以混沌理论为基础，通过试验研究滚动轴承摩擦力矩时间序列的非线性特征评估问题，为精确计算滚动轴承摩擦力矩的动态性能奠定基础。用关联维数标准差刻画摩擦力矩的不确定性，用关联维数均值描述摩擦力矩非线性特征的演变历程。研究表明，滚动轴承属于确定的非线性动力学系统，但其摩擦力矩呈现出明显的不确定性。随着转速的增加，滚动轴承摩擦力矩关联维数标准差与均值都呈现出非线性增大的趋势。
基于形态非抽样小波分解的滚动轴承故障特征提取（Fault Feature Extraction of Rolling Element Bearing Based on Morphological Undecimated Wavelet Decomposition）
滚动轴承 故障诊断 特征提取 形态非抽样小波分解
2010/2/26
针对滚动轴承故障特征信息往往被强背景噪声淹没的问题，提出采用基于多尺度差值形态滤波的形态非抽样小波分解方法提取故障特征。形态非抽样小波分解具有形态学的形态滤波特性与小波分解的多分辨率特性，通过非抽样方式对信号进行分解，克服了传统形态小波分解信息丢失的问题。结合差值形态滤波能够提取信号冲击成分的特点，构造了一种基于多尺度差值形态滤波的形态非抽样小波分解方法，并将其应用于滚动轴承故障特征的提取。仿真与...
Nonlinear vibration signature analysis of high speed rotor due to defects of rolling element
Nonlinear dynamics rolling bearing ball passage frequency
2010/9/27
This paper presents a mathematical model to investigate the nonlinear dynamic behavior of a high speed rotor-bearing system due to defects of rolling elements. Two defects have been considered for the...