| 时变金属切削过程颤振的线性,非线性时序模型 |
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| 引用本文： | 吴雅,徐善祥.时变金属切削过程颤振的线性,非线性时序模型[J].振动工程学报,1991,4(1):25-32. |
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| 作者姓名： | 吴雅 徐善祥 |
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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，第二汽车制造厂，第二汽车制造厂，第二汽车制造厂 |
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| 摘 要： | 本文首先提出了时变金属切削过程的概念,然后采用对信号分段的AR、SETAR模型描述其时变性.文中对时变切削颤振的AR谱、颤振模态的阻尼率、时变系统的特征根、稳态颤振的极限环四个方面进行了研究,并直接用于第二汽车制造厂关键设备M_x-4车床的振动问题,较好地解释了M_x-4车床颤振的一些特有现象.
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| 关 键 词： | 时变系统 切削颤振 特征根 极限环 模态阻尼率 |
Linear and Nonlinear Time Series Models for Time-Varying Metal Cutting Chatters |
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| Wu Ya,Ke Shigu,Yang Shuzi.Linear and Nonlinear Time Series Models for Time-Varying Metal Cutting Chatters[J].Journal of Vibration Engineering,1991,4(1):25-32. |
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| Authors: | Wu Ya Ke Shigu Yang Shuzi |
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| Affiliation: | Wu Ya;Ke Shigu;Yang Shuzi(Huazhong University of Science and Technology)Xu Shanxiang;Li Weiguo;Jiang Qiang(Automobile Works No.2 of China) |
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| Abstract: | The concept of time-varying metal cutting-chatter is developed firstly in this paper and AR and SETAR models based on the segmented time series are then introduced to describe the time-variability. The emphasis of this work is placed on four aspects: the AR spectrum analysis, the chatter modal damping ratio, the eigenvalues of a time-varying system and the limit cycle for a steady chatter.The results of this paper are applied for analyzing the chatter in a type M_x-4 lathe and can be used to explain the special phenomenon of chatter in the lathe.The study of this paper is helpful to time-varying metal cutting chatter. |
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| Keywords: | Time-varying system cutting chatter eigenvalue limit cycle modal damping ratio |
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