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Improvement of Dynamic Characteristics for Optical Pickup Actuator using Finite Difference Scheme and Automated Design Synthesis

유한차분법과 ADS(Automated Design Synthesis)를 이용한 광픽업 액추에이터의 동특성 개선

  • 정기원 (연세대학교 대학원 기계공학과) ;
  • 이진우 (연세대학교 정보저장기기연구센터) ;
  • 이동주 (연세대학교 정보저장기기연구센터) ;
  • 박노철 (연세대학교 정보저장기기연구센터) ;
  • 박영필 (연세대학교 기계공학부)
  • Published : 2003.12.01

Abstract

Recently, there have been many researches and developments in optical disc drive by high density of track and high access speed. Therefore, the optical pick-up should guarantee highly accurate dynamic characteristics for the wide bandwidth in order to cope with this trend. These demands for optical pick-up actuator can be solved by improvements of lens-holder through the following methods. The first way is the analysis of the sensitivity matrix of design variables for vibration modes after appropriate design parameters are selected like shapes and local dimensions of a lens-holder. The second way is the optimization of design variables by calculating sequential linear programming after the problem of extending bandwidth are converted to problem of minimizing adequate objective function. In the result, modified FE model is obtained through several iterations by finite difference scheme(FDS). While results of the first way show better convergence of the target frequency, the second result shows better reduction of mass increase.

Keywords

Actuator;Finite Difference Scheme;Automated Design Synthesis(ADS)

References

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