Abstract The spindle vibrations of the high-speed grinding motorized spindle largely determine the machining quality and precision. In order to accurately predict the spindle vibrations of the PMSM high-speed grinding motorized spindle, the vibration causes are explored and analyzed. The radial vibration, inclined vibration, and axial vibration model are established. The experimental modal analysis method is proposed to analyze the dynamic response of the spindle and to identify the modal parameters of the spindle structure. Thereafter, the frequency response function (FRF) is calculated by self-power spectrum and cross-power spectrum. It is transformed into the vibration spectrum analysis of the spindle. The least-square method is used to fit the radial trajectory of the spindle. This paper aims to propose double standard spheres for 5- DOF spindle vibrations used to detect the spindle vibrations. In the experiment, the method proposed in this paper can effectively and accurately determine the causes of the spindle vibrations. The spectrum analysis and the trajectory are common tools in the spindle vibration detection.

中文翻译：

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基于频域技术的永磁同步电机高速磨削电主轴振动检测与试验

摘要 高速磨削电主轴的主轴振动在很大程度上决定了加工质量和精度。为了准确预测永磁同步电机高速磨削电主轴的主轴振动，对振动原因进行了探索和分析。建立了径向振动、倾斜振动和轴向振动模型。提出了实验模态分析方法来分析主轴的动态响应和识别主轴结构的模态参数。此后，通过自功率谱和互功率谱计算频率响应函数（FRF）。转化为主轴的振动谱分析。最小二乘法用于拟合主轴的径向轨迹。本文旨在提出用于检测主轴振动的 5 自由度主轴振动的双标准球。在实验中，本文提出的方法可以有效准确地确定主轴振动的原因。频谱分析和轨迹是主轴振动检测中常用的工具。