基于多次奇异值分解的信号工频干扰消除方法

Signal Power Frequency Interference Elimination Method Based on Multiple Times Singular Value Decomposition

针对位移振动信号受工频干扰较为严重问题,依据信号所含工频干扰特征,提出多次应用奇异值分解的方法,依次筛选出工频基波及其谐波成分,以实现工频干扰消除目的。研究结果表明,所提取工频成分准确,同陷波器和小波变换方法相比优势明显,具有良好工程实用性。

Displacement vibration signal is severely disturbed by power frequency. According to the characteristics of power frequency interference contained in the signal, multiple times of singular value decomposition method is used to screen out in turn the power frequency fundamental wave and its harmonic components to achieve the purpose of eliminating power frequency interference. The results show that the extracted power frequency components are accurate, it has obvious advantages compared with conventional methods such as notch filter and wavelet transform.