High-speed tracking control system for broadcast-use optical disk drive

被引：0
|
作者：
Koide, Daiichi [1 ]
Tokumaru, Haruki [1 ]
Ohishi, Kiyoshi [2 ]
Kuramochi, Kazuyoshi [2 ]
Miyazaki, Toshimasa [3 ]
机构：
[1] Science and Technical Research Laboratories, NHK (Japan Broadcasting Corporation), 1-10-11 Kinuta, Setagaya-ku, Tokyo 157-8510, Japan
[2] Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka, Nligata 940-2188, Japan
[3] Nagaoka National College of Technology, 888 Nishikatakai, Nagaoka, Niigata 940-8532, Japan
来源：
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 1600年 / 45卷 / 2 B期
关键词：
A high-speed tracking control system using feed-forward control with the zero phase error tracking method (ZPET-FF control) has been applied to high-data-transfer-rate and high-density optical disk drives for broadcast use. To realize high-data-transfer-rate optical disk drives; the optical head must be controlled for track-following with an accuracy of less than 9 nm during high-speed disk rotation. We compared the characteristics of the tracking accuracy of ZPET-FF control with those of conventional feedback control at 15000 rpm and analyzed their frequency responses in a simulation. The results show that the ZPET-FF control is accurate and robust toward periodic disturbances at high speeds. Experimental results show that ZPET-FF control is more precise than feedback control; and the residual tracking error is suppressed to 8.02nm at a linear velocity of 18.3 m/s in an optical disk drive having a blue-violet laser (wavelength: 405 nm); an object lens with a numerical aperture (NA) of 0.85; and media with a track pitch of 0.32 μ. © 2006 The Japan Society of Applied Physics optical disk drive; high-speed; track-following control;
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页码：1187 / 1192
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