Experimental Study on Unbalanced Vibration Signal of High Speed Spindle Based on All Phase Fast Fourier Transform

2019 Prognostics and System Health Management Conference (PHM-Qingdao) Pub Date : 2019-10-01 DOI:10.1109/phm-qingdao46334.2019.8943034

Wanglong Zhan, Du Siyuan, Yue Guo-dong, Z. Huimin

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Abstract

The spindle system will vibrate due to mass unbalance during high speed operation, which will affect the machining accuracy. In order to compensate the dynamic balance quality of unbalanced vibration, spindle dynamic balance processing can be carried out. In the process of dynamic balance processing, the extraction of unbalanced vibration signal is the key to affect the balance quality. The vibration signal extraction experiment of high-speed spindle was carried out by using all-phase FFT method. The vibration signal extracted by the all-phase FFT method is taken as the input of the influence coefficient method, and the amplitude of vibration is obviously reduced, and the balance precision reaches 65.21%. Compared with the cross-correlation method, the unbalanced vibration is effectively suppressed. The results show that the all-phase FFT method has the characteristics of stability and high balance precision, and can be applied to the vibration signal extraction of high-speed spindle and the vibration signal extraction of rotary subclass.

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基于全相位快速傅里叶变换的高速主轴不平衡振动信号实验研究

高速运转时，主轴系统会因质量不平衡而产生振动，影响加工精度。为了补偿不平衡振动的动平衡质量，可以对主轴进行动平衡处理。在动平衡处理过程中，不平衡振动信号的提取是影响平衡质量的关键。采用全相位FFT方法对高速主轴振动信号进行了提取实验。将全相位FFT方法提取的振动信号作为影响系数法的输入，振动幅值明显减小，平衡精度达到65.21%。与互相关方法相比，该方法有效地抑制了不平衡振动。结果表明，全相位FFT方法具有稳定、平衡精度高的特点，可应用于高速主轴振动信号提取和旋转子类振动信号提取。

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2019 Prognostics and System Health Management Conference (PHM-Qingdao)

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