Feed-Forward Tracking Servo System for High-Data-Rate Optical Recording
| Autor: | Haruki Tokumaru, Y. Hayakawa, Hitoshi Yanagisawa, Daiichi Koide, Kiyoshi Ohishi, Haruo Okuda |
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| Rok vydání: | 2003 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Computer science business.industry Servo control General Engineering Feed forward General Physics and Astronomy Tracking system Servomechanism Tracking (particle physics) law.invention Tracking error law Control theory Servo bandwidth Control system Optical recording business Optical disc Computer hardware |
| Zdroj: | Japanese Journal of Applied Physics. 42:939-945 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.42.939 |
| Popis: | A high-speed and highly precise track-following control system for high-data-rate optical recording is proposed. We are developing an optical disk camera-recorder to record high-definition television signals for collecting broadcast program materials. This system must have both a high data transfer rate of more than 100 Mbps and a large recording capacity. That requires high-speed rotation of the optical disk and highly-precise optical head control for tracking on narrow-pitch disks. To meet these requirements, we propose a new tracking control method consisting of a feedback controller and a feed-forward controller that employs the zero phase error tracking method. Simulation results show that the feed-forward controller suppresses tracking error. Suppression of tracking error is also shown by experiments using an optical disk tester composed of a blue-violet laser and a high-density optical disk controlled by an experimental device that implements the optimized algorithm of this control method at high speed. |
| Databáze: | OpenAIRE |
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