高速电主轴轴向振动研究

PDF(2141 KB)

振动与冲击 ›› 2014, Vol. 33 ›› Issue (20) : 70-74.

论文

高速电主轴轴向振动研究

陈小安，张朋，合烨，刘俊峰

作者信息 +

Axial vibration of high-speed motorized spindles

CHEN Xiao-an，ZHANG Peng，HE Ye，LIU Jun-feng

Author information +

文章历史 +

摘要

针对高速电主轴轴向振动直接影响立式加工件品质高低问题，用有限元法建立高速电主轴转子-轴承动力学模型，分析系统固有特性。轴向一阶固有振型为转子刚体振动振形，固有频率远低于一阶径向振动，理论计算固有频率结果与实验结果误差较小；据线性二次型最优控制理论对高速电主轴轴向振动的主动抑制进行理论分析，设计输出反馈控制系统，建立闭环动力学模型。实例计算结果表明，闭环系统能有效抑制高速电主轴轴向振动。

Abstract

The processing quality of vertical machining workpiece is affected by the rotor’s axial vibration of high-speed motorized spindles. This paper presents a dynamic model by the finite element to discuss the dynamic behaviors of high-speed motorized spindles. It has been found that the axial rigid vibration is the first natural mode of vibration and the first natural frequency of axial vibration is lower than radial vibration. The good agreement between the theoretical results and the experimental data indicates that the model can describe the dynamic characteristics of the axial vibration. Finally, the axial vibration active suppression theory of high-speed motorized spindles has been carried out based on the linear quadratic optimal control theory. The simulation result shows that the axial vibration amplitude of closed-loop system will attenuate fast compared with the open-loop system.

导出引用

陈小安;张朋;合烨;刘俊峰. 高速电主轴轴向振动研究[J]. 振动与冲击, 2014, 33(20): 70-74

CHEN Xiao-an;ZHANG Peng;HE Ye;LIU Jun-feng. Axial vibration of high-speed motorized spindles[J]. Journal of Vibration and Shock, 2014, 33(20): 70-74