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

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Tracking Performance Improvement for Optical Disk Drive Using Error-based Modified Disturbance Observer

오차 기반의 수정된 외란 관측기를 이용한 광디스크 드라이브의 트랙 추종 성능 향상

  • 김홍록 (임베디드소프트웨어협동연구센터) ;
  • 최영진 (한양대 전자정보시스템공학과) ;
  • 서일홍 (한양대 정보통신대학원) ;
  • 정완균 (포항공대 기계공학과)
  • Published : 2006.07.01
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Abstract

Generally, the tracking performance of optical disk drive(ODD) system can be improved using a disturbance observer(DOB). However, a DOB is not easily applied in an ODD system because an additional microprocessor, such as a digital signal processor(DSP), is needed. This paper shows how a DOB system can be replaced by the error-based modified disturbance observer(EM-DOB) when two mathematical conditions are satisfied. Due to the simplified structure of EM-DOB, the algorithm is easily implemented as an analog circuit, which is suitable for the ODD servo system. Additionally, in these algorithms, disturbances rejection performances can be tuned as Q filter parameters. Similar to a DOB system, three design guidelines of a Q filter can be applied. Experimental results of DOB and EM-DOB are evaluated under forced disturbances.

Keywords

References

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