| 基于多尺度线调频基稀疏信号分解的广义解调方法及其在滚动轴承故障诊断中的应用 |
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| 引用本文： | 任凌志,于德介,彭富强.基于多尺度线调频基稀疏信号分解的广义解调方法及其在滚动轴承故障诊断中的应用[J].中国电机工程学报,2010(11). |
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| 作者姓名： | 任凌志 于德介 彭富强 |
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| 作者单位： | 汽车车身先进设计制造国家重点实验室(湖南大学); |
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| 基金项目： | 国家自然科学基金项目(50875078); 国家863高技术基金项目(2009AA04Z414); 湖南大学汽车车身先进设计制造国家重点实验室自主课题项目(60870002)~~ |
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| 摘 要： | 提出了一种基于多尺度线调频基稀疏信号分解的广义解调方法,并将其应用于非平稳转速下的滚动轴承故障诊断。该方法先采用基于多尺度线调频基的稀疏信号分解方法分解频率呈曲线变化的多分量信号,得到瞬时频率和瞬时幅值都具有物理意义的单分量信号及其相位函数,再基于获取的各分量信号的相位函数对原信号进行广义解调处理,从而将非平稳信号转化为平稳信号。当转速变化时,滚动轴承故障特征频率为曲线变化的非平稳信号,对其包络信号进行基于多尺度线调频基的稀疏信号分解,提取包络信号分量,再对包络信号分量进行广义解调,根据广义解调后分量信号频率成分与转频的关系即可判断滚动轴承的故障部位和类型。仿真信号与轴承内外圈故障振动信号分析结果表明,该方法比传统的包络信号分析方法能更有效地提取滚动轴承故障振动信号特征。
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| 关 键 词： | 稀疏信号分解 线调频基 广义解调 滚动轴承 故障诊断 |
Generalized Demodulation Method Based on Multi-scale Chirplet and Sparse Signal Decomposition and Its Application to Roller Bearing Fault Diagnosis |
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| REN Ling-zhi,YU De-jie,PENG Fu-qiang.Generalized Demodulation Method Based on Multi-scale Chirplet and Sparse Signal Decomposition and Its Application to Roller Bearing Fault Diagnosis[J].Proceedings of the CSEE,2010(11). |
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| Authors: | REN Ling-zhi YU De-jie PENG Fu-qiang |
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| Affiliation: | REN Ling-zhi,YU De-jie,PENG Fu-qiang(State Key Laboratory of Advanced Design , Manufacture for Vehicle Body,Hunan University,Changsha 410082,Hunan Province,China) |
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| Abstract: | A new generalized demodulation method based on multi-scale chirplet and sparse signal decomposition is proposed and applied to the bearing fault diagnosis under non-stationary rotating speed.Firstly,the multi-component signal is decomposed by using of the sparse signal decomposition based on multi-scale chirplet and the mono-component signals and its phase functions are obtained.Then,based on the obtained phase functions of mono-component signals,the generalized demodulation method is used to transform the ... |
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| Keywords: | sparse signal decomposition chirplet base function generalized demodulation roller bearing fault diagnosis |
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