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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지
DOI QR코드

DOI QR Code

Plate Spring Design of a Micro Actuator Using Topology-parameter Optimization

위상-치수 최적화에 의한 마이크로 구동기 판 스프링의 설계

  • 이종진 (LG전자 DS연구소 DCT그룹) ;
  • 이호철 (대구가톨릭대학교 기계자동차공학부) ;
  • 유정훈 (연세대학교 기계공학부)
  • Published : 2007.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

The recent issue of optical pickup actuators is to apply optical storage devices to mobile devices such as a cellular phone and PDA. It requires actuators to become smaller than conventional types. As the size becomes smaller, the magnetic force is reduced and the assembly of optical pickup actuators becomes more difficult. In addition, its dynamic characteristics are changed. In this paper, methods to improve magnetic forces and dynamic characteristics are suggested and the optimal result of the plate spring design is obtained. A diamond shape magnet and the fine pattern coil (FPC) are used to improve magnetic forces and damping elements are attached to decrease the peak magnitude of the mode instead of using structural damping, mostly for the purpose of improving the accuracy of the finite element simulation. To get more stable dynamic characteristics than conventional ones, a plate spring is applied to the optical pickup actuator and it is optimized with topology and parameter optimization to obtain the concept and the detail design, respectively.

Keywords

References

  1. Fusayasu, H. and Yokota, Y., 1998, 'Optimization of a Micro Actuator with Taguchi Method and Multivariate Analysis Method', IEEE Transactions on Magnetics, Vol. 34, No.4, pp. 2138-2140 https://doi.org/10.1109/20.706829
  2. Nishiwaki, S., Frecker, M. I., Min. S. and Kikuchi, N., 1998, 'Topology Optimization of Compliant Mechanism Using The Homogenization Method', International Journal for Numerical Methods in Engineering, Vol. 42, pp.535-559 https://doi.org/10.1002/(SICI)1097-0207(19980615)42:3<535::AID-NME372>3.0.CO;2-J
  3. Suzuki, K. and Kikuchi, N., 1991, 'A Homogenization Method for Shape and Topology Optimization', Computer Methods in Applied Mechanics and Engineering, Vol. 93, pp.291-318 https://doi.org/10.1016/0045-7825(91)90245-2
  4. Ma, Z.-D., Kikuchi, N. and Cheng, H.-C., 1995, 'Topology Design for Vibrating Structures', Computer Methods in Applied Mechanics and Engineering, Vol. 121, pp.259-280 https://doi.org/10.1016/0045-7825(94)00714-X
  5. Kim, Y. Y., Kim, J. H. and Han, J. Y., 1999, 'A New Optical Pickup Suspension Design', International Journal of Solids and Structures, Vol. 36, pp.2541-2556 https://doi.org/10.1016/S0020-7683(98)00122-X
  6. Hong, H., Yoo, J. and Lee, H. C., 2005, 'Optimal Design of the Plate Spring Suspension in an Optical Pickup Actuator', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 15, No.2, pp.232-238 https://doi.org/10.5050/KSNVN.2005.15.2.232
  7. Ke, C.-Y., Chang, C.-L., Ju, J.-J. and Huang, D.-R., 2002, 'A Magnetic Design for a Slim Type DVD Actuator', Journal of Magnetism and Magnetic Materials, Vol. 239, Issuesl-3, pp.604-606 https://doi.org/10.1016/S0304-8853(01)00680-1
  8. Myers, R. H. and Montgomery, D. C., 1995, 'Response Surface Methodology: Process and Product Optimization using Design of Experiments', John Wiley & Sons, New York