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

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Enhanced Performance of Disturbance Observer by Embedding a Filter and Its Application to Hard Disk Drive

필터 삽입에 의한 외란 관측기의 성능 향상과 하드디스크 장치에의 적용

  • Ha, Jongsoo (ASRI, Department of Electrical and Computer Engineering, Seoul National University) ;
  • Park, Gyunghoon (ASRI, Department of Electrical and Computer Engineering, Seoul National University) ;
  • Shim, Hyungbo (ASRI, Department of Electrical and Computer Engineering, Seoul National University)
  • 하종수 (서울대학교 전기.정보공학부) ;
  • 박경훈 (서울대학교 전기.정보공학부) ;
  • 심형보 (서울대학교 전기.정보공학부)
  • Received : 2015.03.20
  • Accepted : 2015.07.24
  • Published : 2015.09.01
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Abstract

In this paper, we present a new control structure which is obtained by adding an appropriately designed filter to a conventional disturbance observer. The proposed controlled system preserves advantages of a system with the conventional disturbance observer; disturbance rejection and nominal performance recovery. In particular, by embedding the filter, the disturbance rejection performance is enhanced compared with that of the classical disturbance observer-based controlled system. Moreover, we suggest a condition for the robust internal stability of the considered system in this paper. Simulation results regarding an effect of relatively high-frequency disturbance on hard disk drive are also presented.

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References

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