针对非线性非平稳信号的去噪问题，提出一种基于主成分分析（ＰＣＡ）的经验模态分解（ＥＭＤ）消噪方法．该方法根据ＥＭＤ的分解特性，利用ＰＣＡ对噪声信号经ＥＭＤ分解后的内蕴模态函数（ＩＭＦ）进行去噪处理-For nonlinear and non-stationary signal de-noising is proposed based on principal component analysis (PCA) of the empirical mode decomposition (EMD) de

滚动轴承振动信号容易受 到随机噪声 的污染, 如 何去噪 成为滚动轴承故障诊断的关键问题之一。而传统的消噪方法可能会将信号中一些能量小的有用信号当作噪声消除, 本 文即提出 一种改进 的小波消噪方法-Rolling bearing vibration signals are easily influenced by the random noise pollution, such as any denoising become one of the key problems of rolling