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| 基于连续小波变换的瞬时频率提取在光电编码器速度测量中的应用 |
| Application of instantaneous frequency extraction based on continuous wavelet transform in velocity measurement of photoelectric encoder |
| 投稿时间：2018-03-29 |
| DOI：10.3969/j.issn.1005-5630.2018.06.004 |
| 中文关键词: 光电编码器 连续小波变换 瞬时频率 |
| 英文关键词:photoelectric encoder continuous wavelet transform instantaneous frequency |
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| 摘要点击次数: 3506 |
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| 中文摘要: |
| 提出一种新的光电编码器速度测量方法，根据编码器角度测量误差信号中高频分量的渐进特性，通过对角度误差信号进行时频分析，提取编码器的旋转速度。利用功能强大的连续小波变换非平稳信号分析工具，提取角度误差分量的特征。基于连续小波变换，实现了一种称为迭代算法的小波脊提取方法，用于瞬时频率估计。实验结果表明，经过适当的时频分析处理后，角度误差的高频分量可以有效地用于光电编码器的速度测量。该方法能够有效减弱噪声和干扰对测量精度的影响。 |
| 英文摘要: |
| A new velocity measurement of photoelectrical encoder was proposed.According to the progressive characteristics of the high-frequency components in the angle error signal of the encoder,the velocity of rotation information was extracted by processing and analyzing the measured angle error.Continuous wavelet transform as a powerful non-stationary signal analysis tool is used for extracting the features of angle error components.Based on the continuous wavelet transform,a wavelet ridge extraction method,called iterative algorithm,was carried out for the instantaneous frequency estimation.The effectiveness of the proposed method has been validated by the experimental data.The results demonstrated that the high-frequency components of the angle error,after proper processing by time-frequency analysis techniques,can be effectively used for velocity measurement of the photoelectric encoder.This method can effectively reduce the influence of noise and interference on the measurement accuracy. |
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