Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Fast Compensator of Periodic Disturbance in Disk Drives

디스크 드라이브의 주기적 외란 고속 보상 제어

  • 부찬혁 (제주대학교 대학원 전기전자공학과) ;
  • 김호찬 (제주대학교 전기전자공학부) ;
  • 강창익 (제주대학교 해양계측공학과)
  • Published : 2004.02.01
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Abstract

The control objective in hard disk drives is to move head as fast as possible to target track and position the head over the center of target track in the presence of external disturbances. The external shock or disk clamping error in manufacturing process causes the disk center to deviate from the disk rotation center. The disk shift acts on the control system as disturbance and degrades severely the performance of disk drives. In this paper, we present a new controller that compensates for the periodic disturbances very fast. The disturbance compensator is arranged in parallel with the state feedback controller. To avoid the interference with the state feedback controller, the compensator creates compensation signal without the feedback of system output until steady state. The pulse type controller is included additionally for improving the transient performance due to initial state. Finally, in order to demonstrate the superior performance of the proposed compensator. we present some experimental results using a commercially available disk drive.

Keywords

References

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