刚度主轴方位对模态耦合再生切削系统动态响应谐参数的影响

林洁琼;周晓勤;孔繁森;王文才;于骏一

振动与冲击 ›› 2009, Vol. 28 ›› Issue (5) : 63-68.

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PDF(2493 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (5) : 63-68.
论文

刚度主轴方位对模态耦合再生切削系统动态响应谐参数的影响

  • 林洁琼1,2,周晓勤1,孔繁森1,王文才2,于骏一1
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Influence of the orientation of principal stiffness axes on the harmonic parameters of dynamic response in mode-coupled regenerative machining system

  • Lin Jie-qiong1,2,Zhou Xiaoqin 1; Kong Fansen 1; Wang Wencai 2; Yu Junyi 1
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摘要

摘 要:综合考虑再生切削效应和模态耦合效应,建立了随机扰动激励下两自由度切削加工系统的时滞动力学模型。分析了刚度主轴方位对切削稳定性叶瓣的影响。将切削系统的动态响应作为观测数据,基于互四阶累积量的谐参数联合估计ESPRIT方法,考察了刚度主轴方位对模态耦合再生切削系统动态响应的互功率、频率和相移等谐参数的影响,揭示了这些谐参数关于刚度主轴方位角的一些新依赖特征。

Abstract

Abstract: Both regenerative cutting and mode-coupling principles are taken into consideration to model the delayed dynamics of regenerative machining system under stochastic excitation. The influencing of the orientation of principal stiffness axes on machining instability lobes is analyzed. The dynamic responses of machining system are sampled as the observation data. The cross fourth-order cumulant based ESPRIT approach to jointly estimating harmonic parameters is proposed, which is applied to investigate the influence of the orientation of principal stiffness axes into the harmonic parameters of dynamic response in mode-coupled regenerative machining system. Several novel dependent characteristics of the harmonic parameters on the orientation of principal stiffness axes is disclosed, these harmonic parameters includes the frequency, phase shift and cross power of the dynamic machining responses.
Key words: machine tool; regenerative machining; mode-coupling principle; dynamic stability; cross high-order cumulants.

关键词

机床 / 再生切削 / 模态耦合效应 / 动态稳定性 / 互高阶累积量

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林洁琼;周晓勤;孔繁森;王文才;于骏一. 刚度主轴方位对模态耦合再生切削系统动态响应谐参数的影响[J]. 振动与冲击, 2009, 28(5): 63-68
Lin Jie-qiong;Zhou Xiaoqin;Kong Fansen;Wang Wencai;Yu Junyi . Influence of the orientation of principal stiffness axes on the harmonic parameters of dynamic response in mode-coupled regenerative machining system [J]. Journal of Vibration and Shock, 2009, 28(5): 63-68

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