基于变步长LMS算法的自适应逆控制系统  

Adaptive Inverse Control System Based on Variable Step Size LMS Algorithm

作　　者：刘福才[1] 高雪[1] 吴士昌[1] 

机构地区：[1]燕山大学工业计算机控制工程河北省重点实验室,河北秦皇岛066004

出　　处：《信息与控制》2008年第4期481-486,共6页Information and Control

摘　　要：针对各种变步长自适应滤波算法,提出了两种收敛速度快、鲁棒性能好的基于变步长X-滤波、ε-滤波LMS算法和带反馈补偿的自适应逆控制系统.变步长自适应滤波算法可以使系统获得更快的收敛速度和较小的稳态误差,提高了控制精度;反馈补偿可以克服系统的零漂移.仿真结果表明,经过改进的基于变步长X-滤波、ε-滤波LMS算法的自适应逆控制系统收敛速度快、稳态误差小、抗噪声扰动能力强.For various kinds of variable step-size adaptive filtering algorithms, this paper presents two novel adaptive inverse control systems based on the variable step-size X-filtered, e-filtered LMS filtering algorithms and feedback com- pensation, and the control systems have fast convergency speed and good robustness. Variable step-size adaptive filtering algorithm can provide the adaptive inverse control （AIC） system with fast convergency speed and small error, and improve the control accuracy. Feedback compensation can counteract the direct current zero frequency drift of the AIC system. The computer simulation results indicate that the system based on these adaptive algorithms is of fast convergency speed, small error and good ability to cancel noises.

关 键 词：变步长 X-滤波LMS算法 ε-滤波LMS算法 直流零漂 自适应逆控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]