| 碰摩信号的小波表示及其相空间特征研究 |
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| 引用本文： | 张志禹,王月玲,汪文秉,顾家柳.碰摩信号的小波表示及其相空间特征研究[J].西安交通大学学报,2001,35(10):1042-1045,1049. |
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| 作者姓名： | 张志禹 王月玲 汪文秉 顾家柳 |
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| 作者单位： | 1. 西安交通大学电子与信息工程学院,
2. 西北工业大学振动工程研究所 |
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| 基金项目： | 国家自然科学基金资助项目(69831020). |
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| 摘 要： | 对转子动静碰摩信号的相空间特征进行了分析和检测，分别用连续小波变换、多尺度分解、小波包和能量－尺度对比方法对动静碰摩振动响应的径向分量进行了研究，且在相空间得到了一些故障特征。用连续小波变换分析碰摩信号时，与碰摩点相对应的小波系数分布在较小的尺度上，且随着尺度的减小，小波系数模极大值线逐渐收敛于碰摩点处；用多尺度分解方法得到的第1级和第2级的细节信号中反映了碰摩点的特征，表现为局部极值点；用时间－尺度能量对比方法分析，这些特征表现得更为明显。这些特征都有助于故障的准确诊断。
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| 关 键 词： | 小波变换 故障诊断 相空间特征 碰摩信号 碰摩转子系统 碰摩点 发动机 |
| 文章编号： | 0253-987(2001)10-1042-04 |
Characteristics of Rub-Impact Signal in Phase Space |
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| Zhang Zhiyu,Wang Yueling,Wang Wenbing,Gu Jialiu.Characteristics of Rub-Impact Signal in Phase Space[J].Journal of Xi'an Jiaotong University,2001,35(10):1042-1045,1049. |
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| Authors: | Zhang Zhiyu Wang Yueling Wang Wenbing Gu Jialiu |
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| Institution: | Zhang Zhiyu1,Wang Yueling1,Wang Wenbing1,Gu Jialiu2 |
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| Abstract: | Features of a rotor-to-stator rub-impact a re analyzed and detected. Several methods (including continuous wavelets, discrete wavelets, wavelet packets and time-scale energy contrast method) are applied t o obtain the characteristics of the rub-impact signal in the phase space. Numer ical results show that continuous wavelet transform corresponding to rub-impact points at small scales converges as the scale is decreased. For the image of mu lti-scale decomposition, the characteristics of rub-impact points manifest as local extreme value of the first and second detail components. Similar character istics are more distinct in the energy contrast image of time-scale domain. Thi s work enhances the diagnosis of rub-impact. |
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| Keywords: | wavelet transform rub-impact fault diagnosis characteristics of phase space |
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