改进的卷积型小波包分解及在故障诊断中的应用

田福庆; 罗荣; 李万; 丁庆喜

doi:10.7652/xjtuxb201403017

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改进的卷积型小波包分解及在故障诊断中的应用

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- 改进的卷积型小波包分解及在故障诊断中的应用
- Improved Convolution-Type Wavelet Packet Decomposition with Applications to Fault Diagnosis
- 西安交通大学学报 2014年48卷第3期页码：89-95
- 作者机构：
  
  海军工程大学兵器工程系,武汉,430033
- 作者简介：
- 基金信息：
  
  : 2013-05-05。作者简介: 田福庆(1962—),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(50775218);国家部委基金资助项目(4010801020202)
- DOI：10.7652/xjtuxb201403017
  中图分类号： TH113.1
- 网络首发：2014-03-10，
  
  纸质出版：2014
- 稿件说明：
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田福庆, 罗荣, 李万, 等. 改进的卷积型小波包分解及在故障诊断中的应用[J]. 西安交通大学学报, 2014,48(3):89-95.

Improved Convolution-Type Wavelet Packet Decomposition with Applications to Fault Diagnosis[J]. 2014, 48(3): 89-95.
田福庆, 罗荣, 李万, 等. 改进的卷积型小波包分解及在故障诊断中的应用[J]. 西安交通大学学报, 2014,48(3):89-95. DOI： 10.7652/xjtuxb201403017.

Improved Convolution-Type Wavelet Packet Decomposition with Applications to Fault Diagnosis[J]. 2014, 48(3): 89-95. DOI： 10.7652/xjtuxb201403017.

摘要

针对卷积型小波包分解存在频带错位与频带重叠缺陷

提出了一种改进的卷积型小波包分解算法。该算法通过交换偶数位置节点小波包分解后的两节点顺序来消除频带错位缺陷

引入两算子分别从频域除去低、高频子带理想通带范围外的频率成分以消除频带重叠缺陷。由构造的故障信号进行仿真实验

并使用某直升机中减速器疲劳实验的故障数据进行了验证。结果表明:由于消除了卷积型小波包和内积型小波包分解算法中广泛存在的频率折叠、频带重叠和频带错位缺陷

改造的卷积型小波包分解算法能更方便、更有效地提取隐藏在强噪声和其他强干扰背景下的故障特征信息

从而为机械故障的诊断提供了一种强有力的分析手段。

Abstract

Aiming at frequency band derangement and overlap in convolution-type wavelet packet

an improved one is proposed. Exchanging the order of sub-nodes originated from father nodes sequenced in even serial numbers

the frequency band derangement is removed. Introducing two operators eliminating the frequencies outside the pass bands of low and high frequency sub-bands

the frequency band overlap is forced to be avoided. The simulated fault signals and endurance test datasets of a helicopter intermediate gearbox are respectively collected to certificate the improved convolution-type wavelet packet. The results show that the improved convolution-type wavelet packet enables to expediently and effectively detect the fault features submerged in strong interference owing to the elimination of frequency aliasing

frequency band overlap and derangement.

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references

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