Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Disk Vibration and Eccentricity Compensation of Near Field Recording Systems Based on the Internal Model Principle

IMP를 이용한 근접장 기록 장치의 디스크 진동 및 편심 보상

  • 정준 (동양공업전문대학 자동화시스템과) ;
  • 김중곤 (연세대학교 정보저장기기 연구센터) ;
  • 박노철 (연세대학교 정보저장기기 연구센터) ;
  • 양현석 (연세대학교 기계공학과) ;
  • 박영필 (연세대학교 기계공학과)
  • Published : 2007.06.20
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Abstract

Information storage devices using disks have a disk vibration at the frequency which is equivalent to the disk rotational speed. They also have a track vibration due to the disk eccentricity at the same frequency. In near field recording systems, the former affects the air-gap servo and the latter affects the tracking servo. In this paper, we introduce a novel control algorithm based on the internal model principle to both servos. A controller block designed by the principle is connected to the base lead-lag type compensator in parallel in order to cancel the repeatable run-out due to the disk vibration or eccentricity. Simulation and practical application of the algorithm on a near field recording system show good servo performance.

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References

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