Design of a feedforward control system considering dead time for optical disc systems

Keisuke Yoshida, T. Ohashi, K. Ohishi, T. Miyazaki
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Abstract

Recently, the data size of digital content has increased. In order to cope, manufacturers have tried to increase capacity by narrowing the track pitch of digital storage media. In addition, recent advancements in technology have resulted in a new optical disc that has a rotation speed of over 15,000 rpm. Considering all these factors, a high-precision pick-up control system is needed for optical discs. In this study, a feedforward control system using an error prediction mechanism to effectively suppress periodic components is implemented. However, the feedforward control system of a conventional pick-up control system does not consider the dead time delay component. This paper proposes a zero phase error tracking feedforward control system that does consider it. The propose control system is designed and implemented for a test system, the ODU-1000 for Blu-ray Disc, implanted in a digital signal processor (DSP). The results of experiments confirm that the propose system is practical and effective.
考虑死区时间的光盘系统前馈控制系统设计
最近,数字内容的数据量增加了。为了应对这种情况,制造商试图通过缩小数字存储媒体的磁道间距来增加容量。此外,最近的技术进步已经产生了一种新的光盘,其转速超过15,000转/分钟。考虑到这些因素,需要一种高精度的光盘拾取控制系统。本文提出了一种利用误差预测机制有效抑制周期分量的前馈控制系统。然而,传统的拾取控制系统的前馈控制系统没有考虑死区延时分量。本文提出了一种考虑了这一问题的零相位误差跟踪前馈控制系统。本文设计并实现了一种基于数字信号处理器(DSP)的蓝光光盘ODU-1000测试系统的控制系统。实验结果证明了该系统的实用性和有效性。
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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