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.
出处
《信息与控制》
CSCD
北大核心
2008年第4期481-486,共6页
Information and Control
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
variable step size
X-filtered LMS algorithm
e-filtered LMS algorithm
direct current zero frequency drift
adaptive inverse control
