高精度动平衡测量中不平衡信号提取方法研究

李传江;费敏锐;张自强

振动与冲击 ›› 2012, Vol. 31 ›› Issue (14) : 124-127.

PDF(1481 KB)
PDF(1481 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (14) : 124-127.
论文

高精度动平衡测量中不平衡信号提取方法研究

  • 李传江1,2 费敏锐2 ,张自强1
作者信息 +

Research of Extraction Method for Unbalance Signal in High Precision Dynamic Balancing Measurement

  • li chuan-jiang,fei min-rui,zhang zi-qiang
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摘要




摘要:针对不平衡量较小时振动信号可能出现的拍频现象,提出一种估算拍频周期的方法和采用正弦逼近法提取不平衡量幅值和相位的方法。通过FFT运算得到近频干扰信号的频率,进而估算信号拍动周期,把一个拍动周期内的数据作为训练样本,采用正弦逼近法来提取不平衡信号的幅值和相位。仿真和实验结果表明,该方法有效解决了不平衡量比较小时测量结果不稳定的现象,提高了测量精度。

Abstract

Abstract:
Beat wave probably appears in vibration signal when unbalance is small. An estimation of beat frequency period and extraction of unbalance using sine approximation method is proposed in this paper. Period of beat frequency is estimated based on frequency composition of FFT result. Then, sine approximation method is used in extraction of unbalance amplitude and phase based on vibration data in a whole beat period. Simulation and experiments shows that this method solves unsteadiness of measuring result when unbalance is small, so the measurement precision is improved.

关键词

动平衡 正弦逼近 整周期采样

Key words

dynamic balancing / sine approximation method / full period sampling

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李传江;费敏锐;张自强. 高精度动平衡测量中不平衡信号提取方法研究[J]. 振动与冲击, 2012, 31(14): 124-127
li chuan-jiang;fei min-rui;zhang zi-qiang. Research of Extraction Method for Unbalance Signal in High Precision Dynamic Balancing Measurement[J]. Journal of Vibration and Shock, 2012, 31(14): 124-127

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