Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Design and Analysis of a Lever actuator for the Optical Disk Pickup

광디스크 픽업용 3축 레버 구동기의 설계 및 해석

  • 한창수 (한국기계 연구원 지능형 정밀기계 연구부) ;
  • 김수현 (한국과학기술원 기계공학과)
  • Published : 2002.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Optical disk system aiming at fast data transfer rate and high-density recording requires the improvement in performance of the pickup head. Especially, the pickup actuator needs better linearity and stability. So, a lever actuator for optical disk is proposed. In this paper, the role of lever and its structure are discussed and the flexure hinge is introduced to enhance the precise movement. Using the Newoton's method, the motion of equation for the lever actuator is obtained. The results are compared with the analysis results by the FEM (Finite Element Method) for the vibration and the magnetic field. Consequently, the lever actuator has the 2"d system characteristics in 3-axis moving directions and superior stability for the external vibration.tion.

Keywords

References

  1. S. Saegusa and S. Yoshida, 'Mechatronics in optical head mechanism,' Int. J. Japan Soc. Prec. Eng., Vol. 31, No. 3, pp. 172-176, 1997
  2. Masahara T. et al., 'Special report (DVD vies with VOD),' NIKKEI Electronics, pp. 50-50, May 1990
  3. 한창수, 김수현, '차세대 광픽업 구동기를 위한 설계변수,' 한국정밀공학회지, 제18권, 1호, pp. 82-88, 2001
  4. 송태선, 이문도, 전홍걸, 박노철, 박영필, '광 정보저장장치의 기술동향,' 한국정밀공학회지 제18권, 제4호, pp. 25-36, 2001
  5. T. Tojo, K. Sugihara, 'Piezoelectric-driven turntable with high positioning accuracy(1st repost)-operation principle and basic performance,' Bull., JSPE, Vol. 23, No. 1, pp. 315-320, 1989
  6. F. E. Scire and E. C. Taegue, 'Piezodriven 50-${\mu}m$ range stage with subnanometer resolution,' Int. J. Japan Soc. Prec. Eng., Vol. 25, No. 4, pp. 315-320, 1991
  7. J.M. Paros and L. Weisbord, 'How to design flexure hinge,' Machine Design, No. T27, pp151-157, 1965
  8. R. Yang, M. Jouaneh, and R. Schwiezer, 'Design and characterization of a low profile micropositioning stage,' J. Precision Eng., Vol. 20, pp. 20-29, 1996 https://doi.org/10.1016/0141-6359(95)00032-1
  9. W. Xu and T. King, 'Flexure hinges for piezoactuator displacement amplifiers: flexibility, accuracy, and stress considerations,' J. Precision Eng., Vol. 19, No. 1, pp. 4-10, 1996 https://doi.org/10.1016/0141-6359(95)00056-9