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Mechanism Design of Optical Pickup Actuator for Fast Access of Optical Disk Drive  

박준혁 (연세대학교 대학원 기계공학과)
이상헌 (연세대학교 대학원 기계공학과)
백윤수 (연세대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.19, no.12, 2002 , pp. 109-119 More about this Journal
Abstract
In this paper, mechanism design of optical pickup actuator for fast access is proposed. This actuator is composed of moving magnet type actuator and moving coil type actuator for tracking and fine motion, respectively. Moving magnet type tracking actuator is configurated by two permanent magnets and four air-core solenoids. Additional damper by induced current in tracking actuator can reduce the transient vibration between the coarse seeking servo and fine seeking servo. Variable stiffness can be acquired by applying current to air-core solenoid simply. This actuator can achieve fast access by these additional damper and stiffness. Performance of this actuator is predicted through the FEM, simulation and simple experiment. Settling time for transient vibration is reduced to 14.7% according to simulation result.
Keywords
Optical pickup actuator; Moving magnet type; Moving coil type; Induced damper; Variable stiffness;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 K.H. Park, Choi, J. Ryu, 'Hybrid actuator for high speed and high precision optical disk drives,' Mechatronics, 11, pp. 527-543, 2001   DOI   ScienceOn
2 박준혁, 3 자유도 모터 제어를 위한 영구자석과 철심 솔레노이드간의 힘 특성에 관한 연구, 석사학위논문, 기계공학과, 연세대학교, 1999
3 박준혁, 백윤수, '3 자유도 모터 제어를 위한 철심 솔레노이드 특성의 실험적 해석에 관한 연구,' 대한기계학회논문집 A권, 제 25 권, 제 9 호, pp. 1334-1340, 2001   과학기술학회마을
4 Derek Craik, Magnetism, John Wiley & Sons, 1995
5 Herbert C. Roters, Electromagnetic devices, John Wiley & Sons, 1951
6 T. Kabashima, A. Kawahara, T. Goto, 'Force Calculation Using Magnetizing Currents,' IEEE Transactions on magnetics, Vol. 25, No. 1, pp. 451-457, 1985
7 박준태, LQG 제어기 설계에 의한 광픽업 미세트래킹 액추에이터의 위치제어, 석사학위논문, 기계설계학과, 연세대학교, 1998
8 Ronald K. Wangsness, Electromagnetic fields, John Wiley & Sons, 1997
9 Jeroen Wals, Jadranko Dovic, Amold J. Niessen, Marcel Rieck and M.G. Rus, 'Fast-Access Optical Drive,' Japanese Journal of Applied Physics, Vol. 39, pp. 862-866, 2000   DOI
10 Sorin G. Stan, 'Twin-Actuator For Ultra-Fast Access in CD-ROM Systems,' IEEE Transactions on Consumer Electronics, Vol. 42, No. 4, pp. 1073-1084, 1996   DOI   ScienceOn
11 Kwang Suk Jung, Contact-Free Precision Stage Using Magnetic Levitation, Ph.D. thesis, Dep. Mech. Eng., Yonsei University, 2001