Repetitive Control for the Track-Following Servo System of an Optical Disk Drive

광 디스크 드라이브의 트랙 추종 서보 시스템을 위한 반복 제어

  • 문정호 (삼성전자 중앙연구소) ;
  • 이문노 (삼성전자 V.C.R 사업부 ROM 개발팀) ;
  • 정명진 (한국과학기술원 전기및전자공학과)
  • Published : 1999.01.01

Abstract

Disturbances acting on the track-following servo system of an optical disk drive inherently contain significant periodic components that cause tracking errors of a periodic nature. Such disturbances can be effectively rejected by employing a repetitive controller, which must be implemented carefully in consideration of system stability. Plant uncertainty makes it difficult to design a repetitive controller that will improve tracking performance yet preserve system stability. In this paper, we examine the problem of designing a repetitive controller for an optical disk drive track-following servo system with uncertain plant coefficients. We propose a graphical design technique based on the frequency domain analysis of linear interval systems. This design method results in a repetitive controller that will maintain system stability against all admissible plant uncertainties. We show simulation and experimental results to verify the validity of the proposed design method.

Keywords

References

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