정보저장시스템학회:학술대회논문집
- 정보저장시스템학회 2005년도 추계학술대회 논문집
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- Pages.223-228
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- 2005
광디스크 드라이브의 디스크 표면 결함에 대한 트래킹 제어
Track-following Control for Disk Surface Defect of Optical Disk Drive Systems.
- 발행 : 2005.10.01
초록
In oprical disk drives, surface defects on a disk distort tracking error signal and disturb a precision tracking control.. A conventional method against disk defect is held the tracking control signal when a defective portion is detected. However, if the defective portion is getting longer, objective lens will get away from following track. In order to keep the postion of spot from following track, the servo system must predict tracking error and control the object lens in the defective portion. A tracking control system for optical disk drives was proposed recently based on both Coprime Factorization(CF) and Zero Phase Erro. Tracking(ZPET) control. The system was proposed for overcome the limit of previously tracking error. But there were no research about the method against the defective portion. This paper proposes a new and simple ZPET construct. as a new method against the defective portion. From experimental results, we have proved that proposed method improves the performance against the defective portion, decreases the uncertainty of a model, and requires less memory than the previously proposed method.