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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Track-following Control of an Optical Pick-up Actuator Using PZT

PZT를 이용한 광 정보저장기기용 액추에이터의 트랙 추적제어

  • 정동하 (삼성전자 OMS사업) ;
  • 박태욱 (연세대학교 정보저장공학) ;
  • 박노철 (연세대학교 정보저장공학) ;
  • 양현석 (연세대학교 정보저장공학) ;
  • 이우철 (LG생산기술원 자동화기술그룹)
  • Published : 2004.05.01
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Abstract

This paper proposes a swing-arm type dual-stage actuator, which consists of a PZT actuator for fine motion and a VCM(voice coil motor) for coarse motion, for an SFF ODD(small form factor optical disk drive), in order to achieve fast access speed and precise track-following control. Over the past few decades there have been a lot of researches related to the VCM and dual-stage actuator. In this paper, we focus our attention on the design and control of the PZT actuator. Due to the dual cantilever structure. the PZT actuator can generate precise translational tracking motion at its tip to which an optical pickup is attached. and the effect of hysteric behavior of the PZT element is reduced. The dynamic model of the PZT actuator is derived by using the Hamilton's principle, and verified by comparing it with the experimental frequency response. The sliding mode control is designed in order to be robust against modeling uncertainties. Simulations and experimental results confirm the effectiveness of the suggested control scheme.

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References

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