DVD循轨重复控制器的设计及参数优化

在DVD 循轨伺服控制系统中，碟片的偏心会对循轨误差信号TE(tracking errors)产生周期性的扰动。随着光盘转速的大大提高，该周期扰动会降低激光光头循轨的性能。为了有效的抑制该干扰，DVD 循轨伺服控制系统引入了重复控制器。本文在稳定性条件的基础
上设计重复控制器并提出参数优化的办法，通过仿真验证重复控制器能显著有效地抑制频率已知周期干扰信号。
关 键 词：DVD,循轨伺服,重复控制,周期扰动
Abstract: In the track-following servo system of an optical disk drive, the eccentricity of optical dis will cause periodic disturbances on TE(tracking errors) signals. With the increase of rotating speed, however, the effect of periodic disturbances consequently degrades the performance of track-following. In order to restrain the disturbances effectively, repetitive algorithm is applied to DVD track-following servo system according the characteristic of disturbance. Based on the stability of repetitive controller, this paper promotes a mapped method to determine and optimize the parameter of repetitive controller. And through an experiment, it is verified that the designed repetitive controller has a remarkable
performance to attenuate the periodic disturbance while preserving the overall stability.
Key words: DVD; track-following servo; repetitive control; periodic disturbances