| 高精度动平衡测量中不平衡信号提取方法研究 |
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| 引用本文： | 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. DOI: |
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| 作者姓名： | 李传江 费敏锐 张自强 |
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| 作者单位： | 1.上海师范大学信息与机电工程学院 201418，2.上海大学机电工程与自动化学院，200072 |
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| 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。
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| 关 键 词： | 动平衡 正弦逼近 整周期采样 |
| 收稿时间： | 2011-03-30 |
| 修稿时间： | 2011-08-08 |
Method of unbalance signal extraction in high precision dynamic balancing measurement |
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| LI Chuan-jiang , FEI Min-rui , ZHANG Zi-qiang. Method of unbalance signal extraction in high precision dynamic balancing measurement[J]. Journal of Vibration and Shock, 2012, 31(14): 124-127. DOI: |
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| Authors: | LI Chuan-jiang FEI Min-rui ZHANG Zi-qiang |
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| Affiliation: | college of Information,Mechanical and Electrical Engineering,Shanghai 201418,China;School of Mechanical Engineering & Automaion,Shanghai 200072,China |
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| Abstract: | Beat waves may appear in vibration signal when unbalance is small.An estimation of beat period using FFT was proposed.Then sine approximation method was used in extraction the unbalance magnitude and phase based on vibration data in a whole beat period.Simulations and experiments show that the method resolves the unsteadiness of measured result when the unbalance is small,and the measurement precision is improved. |
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| Keywords: | dynamic balancing sine approximation method full period sampling |
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