Active micro-vibration control based on improved variable step size LMS algorithm

• Published in: 高技术通讯（英文版） Vol. 26; no. 2; pp. 178 - 187
• Main Authors: Li Xiangmin, Fang Yubin, Zhu Xiaojin, Huang Yonghui, Zhou Yijia
• Format: Journal Article
• Language: English
• Published: School of Mechatronics Engineering and Automation,Shanghai University,Shanghai 200240,P.R.China 01.06.2020
• Subjects: convergence and steady state error; active control of micro vibration; adaptive filtering; variable step size least mean square ( LMS) algorithm; loga-rithmic and symbolic functions
• ISSN: 1006-6748
• DOI: 10.3772/j.issn.1006-6748.2020.02.007

The contradiction of variable step size least mean square ( LMS) algorithm between fast conver-gence speed and small steady-state error has always existed.So,a new algorithm based on the com-bination of logarithmic and symbolic function and step size factor is proposed.It establishes a new updating method of step factor that is related to step factor and error signal.This work makes an analysis from 3 aspects: theoretical analysis,theoretical verification and specific experiments.The experimental results show that the proposed algorithm is superior to other variable step size algo-rithms in convergence speed and steady-state error.