| 机床颤振信号互谱特性分析 |
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| 引用本文： | 昌松,梅志坚,杨叔子,师汉民.机床颤振信号互谱特性分析[J].山东大学学报(工学版),1990(3). |
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| 作者姓名： | 昌松 梅志坚 杨叔子 师汉民 |
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| 作者单位： | 华中理工大学，华中理工大学，华中理工大学，华中理工大学 |
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| 基金项目： | 国家自然科学基金，国家教委科技基金 |
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| 摘 要： | 从频谱分析理论和机床颤振的特性出发,在大量试验基础上分析了车削加工系统从平稳切削,经过渡过程到颤振中各种颤振信号之间的互谱特性。着重分析了互谱密度函数中的实部(共谱)、虚部(重谱)以及主频带上的相位差在颤振发展过程中的特征变化。并在此基础上提出了一种新的机床颤振预兆判别的特征量。
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| 关 键 词： | 颤振 频谱分析(力学) 预测技术 互谱 共谱 重谱 |
CROSS SPECTRUM ANALYSIS OF CHATTER SIGNALS OF MACHINE TOOL |
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| Chang Song et al.CROSS SPECTRUM ANALYSIS OF CHATTER SIGNALS OF MACHINE TOOL[J].Journal of Shandong University of Technology,1990(3). |
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| Authors: | Chang Song |
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| Affiliation: | Huazhong Univ. of Sci. and Technol. |
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| Abstract: | Based on the theory of spectrum analysis, the chatter character of machine tool and a series of experiments, analyses the cross spectrum characteristics of various chatter signals during the transient from stable cutting to chattering. Pays special attention to changes of the real component (cospectrum) and imaginary component (quadspectrum) of cross spectrum in the chattering process. The result shows that during the transient, the cospectrum, quadspectrum and phase spectrum in main frequency band take place characteristic changes which can provide the basis for making early diagnosis of chatter. A feature variable describing these characteristic changes is presented. |
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| Keywords: | Flutter Spectral analysis Prediction technique Cross spectrum Cospectrum Quadspectrum |
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