基于幅值与相角小波映射的裂纹转子故障诊断  

FAULT DIAGNOSIS OF CRACKED ROTOR BASED ON AMPLITUDE AND PHASE WAVELET MAP

作　　者：邹剑[1] 陈进[1] 牛军川[2] 宋孔杰[2] 耿遵敏[2] 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200030 [2]山东大学

出　　处：《机械工程学报》2003年第2期33-36,共4页Journal of Mechanical Engineering

基　　金：国家973重点基础研究规划项目(G1998020321);国家自然科学基金(10176014);振动;冲击;噪声国家重点实验室开放基金(VSN-2002-03)资助项目。

摘　　要：建立了基于简单铰链裂纹模型和局部柔度理论的裂纹转子动力学模型,得到了裂纹转子与无裂纹转子的数值仿真解及其傅里叶变换的相角;利用连续小波变换研究了裂纹转子与无裂纹转子的幅值与相角小波映射特性,提出了利用幅值与相角小波映射识别裂纹的新方法。数值仿真研究了尺度因子对幅值与相角小波映射准确性和有效性的影响,给出了建议的尺度因子。试验研究验证了该方法在工程实际中的有效性和实用性。The dynamic equation of cracked rotor is modelled, which is based on the simple hinge crack model and the local flexibility theorem. The numerical simulation solutions of the uncracked rotor and the cracked rotor are obtained from the model, the phase of Fourier transform is calculated. By the continuous wavelet transform, the amplitude and phase wavelet map features of the uncracked rotor and the cracked rotor are investigated. A new detection algorithm using amplitude and phase wavelet map to identify the crack is proposed. The influence of scale factor on the accuracy and validity of the amplitude and phase wavelet map is analyzed through simulation research; the preferred scale factor is suggested. Experiments verify the availability and validity of the amplitude and phase wavelet map in identification of cracked rotor for engineering practices.

关 键 词：幅值 相角 小波映射 裂纹转子 故障诊断 尺度因子 

分 类 号：TH17[机械工程—机械制造及自动化] TH113.1