用同源ANC技术提取金属跌落物冲击信号

Extracting the Impact Signal of Loose Parts from Background Noise with the Same Source ANC

引入同源ＡＮＣ的概念，并提出改进的变步长的ＬＭＳ算法ＥＶＳ，建立基于ＥＶＳ算法的同源ＡＮＣ系统，成功地提取了在小信噪比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 and the impact signals of loose parts have been extracted successfully from the background noise.