Focusing control system for suppressing multi-harmonic disturbances in high speed optical disk systems

2012 12th IEEE International Workshop on Advanced Motion Control (AMC) Pub Date : 2012-03-25 DOI:10.1109/AMC.2012.6197015

Tatsuya Nakazaki, Tokoku Ogata, K. Ohishi, T. Miyazaki, D. Koide, Y. Takano, H. Tokumaru

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引用次数: 2

Abstract

Recently, the size of digital content has continued to increase; therefore digital storage media have been required to increase capacity by narrowing the track pitch and the gap length between the optical head and the disk. On the other hand, anew optical disk has achieved a rotation speed of over 15,000 rpm. To meet these demands, several control systems for optical disks are proposed to achieve high-precision tracking control. In this paper, a high-precision focusing control system is proposed. The proposed control system consists of a feedback controller and a feedforward controller. The feedback controller design is based on a high-gain servo controller (HGSC). The feedforward controller design is based on a zero phase error tracking (ZPET) controller and an additional loop for suppressing multi-harmonic disturbances. The experimental results show the proposed control system has a fine focusing performance against fundamental periodic disturbances and high-order disturbances.

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高速光盘系统中抑制多谐波干扰的聚焦控制系统

最近，数字内容的规模不断增加;因此，数字存储媒体被要求通过缩小磁道间距和光学磁头与磁盘之间的间隙长度来增加容量。另一方面，新型光盘的转速已超过15,000转/分钟。为了满足这些要求，提出了几种光盘控制系统，以实现高精度的跟踪控制。本文提出了一种高精度调焦控制系统。该控制系统由一个反馈控制器和一个前馈控制器组成。反馈控制器的设计基于高增益伺服控制器(HGSC)。前馈控制器设计基于零相位误差跟踪(ZPET)控制器和抑制多谐波干扰的附加环路。实验结果表明，该控制系统对基本周期扰动和高阶扰动具有良好的聚焦性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 12th IEEE International Workshop on Advanced Motion Control (AMC)

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