文档介绍：第 26 卷第 9 期中国电机工程学报 May 2006 2006 年 5 月 Proceedings of the CSEE ?2006 . 文章编号: 0258-8013 (2006) 09-0099-05 中图分类号: TM716 文献标识码: A 学科分类号: 470 ? 40 变步长自适应算法在有源滤波器谐波检测中的应用李辉 1 ,吴正国 1 ,邹云屏 2 , 刘飞 2 ,吴言凤 1 ( 1. 海军工程大学电气与信息工程学院,湖北省武汉市 430033; 2. 华中科技大学电气与电子工程学院,湖北省武汉市 430074 ) A variable Step Size Adaptive Algorithm Applied to Harmonic Detection of Active Filter LI Hui 1, WU Zheng-guo 1, ZOU Yun-ping 2 , LIU Fei 2 ,WU Yan-feng 1 ( Univ. of Engineering, W uhan, 430033, Hubei Province, China; Univ. of Science and Technology , Wuhan 430074, Hubei Province, China) ABSTRACT: A number of conventional time-varying step size algorithms have been tried on the active filter, and experiments indicate that their performance is highly sensitive to the noise disturbance. The paper presents a novel adaptive harmonic detecting algorithm using the coherence average estimation of K ( n) to control the updating of the step size, where K ( n) is the proportion of the error signal e ( n) in the total signal S ( n). It can provide a fast convergence speed and ensure a small detecting error even under low SNR conditi ons. Theoretical analysis is verified by simulation and exper iment results. The convergence speed and steady state perfor mance of