基于相空间重构与独立分量分析的局部独立投影降噪算法

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 33-36.

论文

基于相空间重构与独立分量分析的局部独立投影降噪算法

黄艳林; 李友荣; 肖涵; 吕勇

作者信息 +

The Local Independent Projection De-noising Algorithm Based on Phase-space Reconstruction Technique and Independent Component Analysis

HUANG Yanlin ;LI Yourong ;XIAO Han; LV Yong

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文章历史 +

摘要

针对故障分析信号中存在噪声问题，提出一种将相空间重构与独立分量分析相结合的局部独立投影降噪算法。其中相空间重构的目的在于从高维相空间中恢复混沌吸引子，独立分量分析能够找到信号的主流形，选择邻域是为了将特征相近的相点结合在一起。使用该方法对正弦仿真信号和Lorenz仿真信号进行降噪处理，结果表明局部独立投影降噪算法的降噪效果与局部独立分量分析算法降噪效果接近，但优于全局投影降噪算法。运用该方法对低速重载轴承振动信号进行分析，准确判断出轴承故障。

Abstract

The noise problem exists in Failure Analysis of the signal. Local independent projection de-noising algorithm combinated phase-space reconstruction and independent component analysis is introduced.Phase-space reconstruction can restore the chaotic attractor from high dimensional phase space.Independent component analysis can find the mainstream of the signal shape.Neighborhood can combinate the phase of similar to the feature.This method tests simulation experiments on sinusoidal simulation signal and Lorenz simulation signal,the result shows that the noise reduction effect of Local independent projection analysis is similar to that of local independent component analysis,but better than that of golbal projection algorithm.Low speed and heavy loading bearing vibration signal uses this method and the fault is identified accurately.

导出引用

黄艳林;李友荣;肖涵;吕勇. 基于相空间重构与独立分量分析的局部独立投影降噪算法[J]. 振动与冲击, 2011, 30(1): 33-36

HUANG Yanlin;LI Yourong;XIAO Han;LV Yong. The Local Independent Projection De-noising Algorithm Based on Phase-space Reconstruction Technique and Independent Component Analysis[J]. Journal of Vibration and Shock, 2011, 30(1): 33-36