从背景噪声中提取金属跌落物冲击信号的新方法

The New Method of the Extracting the Impact Signal of Loose Parts from the Background Noise

本文引入同源ＡＮＣ概念，提出了改进的变步长ＬＭＳ算法ＥＶＳ。建立基于ＥＶＳ算法的同源ＡＮＣ系统，成功地提取了在大背景噪声下测得的金属跌落物冲击信号。

The new concept of the same source ANC and the variable step LMS algorithm (EVS)have been developed. Based on the EVS the same source ANC system has been built which the impact signals of loose parts have been extracted successfully from the background noise.