Earticle

초록

영어

Focus and tracking servo control plays an important role in the optical storage systems and the control precision could directly affect the read/write performance of the system. Due to the non-uniformity of the space magnetic field in the optical pickup system, the crosstalk movements among the focus, tracking and rolling direction are generated by the unbalanced magnetic induction forces. In the traditional DVD systems, the servo control in the focus and tracking movement are studied separately without considering possible crosstalk to the rolling movement, which could bring up the undesired tilt angle error. In this paper, the crosstalk effects are studied and a multi-input-multi-output (MIMO) model is developed for the optical pickup systems. Then a mix-sensitivity H∞ controller design approach is proposed for the servo control system so that not only the control precision requirements in the focus and tracking direction are satisfied, but also the tilt angle error caused by the crosstalk effect is effectively reduced. Finally, the control performance is verified in an experimental setup system by the comparison with the traditional lead-lag controller. The experimental results show the effectiveness of the proposed optimal control approach to satisfy the even tighter optical tolerance requirement in the next generation optical storage systems.

목차

Abstract
 1. Introduction
 2. MIMO Modeling of the Optical Pickup Actuator
 3. The Mixed-sensitivity H∞ Controller Design for the Optical Pickup Actuator
 4. Experimental Results
 5. Conclusion
 Acknowledgments
 References

키워드

저자

• Pei Wang [ Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China, 200072 ]
• Zhizheng Wu [ Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China, 200072 ]
• Shuai Yuan [ Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China, 200072 ]
• Qingxi Jia [ Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China, 200072 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605