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Proceedings Paper

Servo control system construction for CBHD radial and axial tracking
Author(s): Yingchao Cui; Xuemin Cheng; Jianshe Ma; Xinnan Hou
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Paper Abstract

CBHD (China Blue High Definition Disc) is a high-definition optical disc standard with Chinese independent intellectual property. Compared with DVD optical pick-up, CBHD optical pick-up, key component of CBHD player, has significant improvement in the channel bit rate and certain reduction in acceptable tolerance range for disk tilt, etc. This paper specifies the servo control system construction for the CBHD radial tracing and axial tracking. This servo control system should ensure the optical beam of OPU focusing on the Disc plane and following the track of CBHD channel accurately. According to the expected radial/axial maximum acceleration and the limitation of emax, an open-loop transfer function specifying the servo system for axial and radial tracking is introduced. The corresponding servo control algorithm including IIR filter based on the above-mentioned transfer function is theoretically analyzed and numerically simulated by MATLAB. Because optical pick-ups are different in dynamic properties and its digital circuit exist quantization error, time delay nonlinearity, etc, the tuning of IIR parameters is laborious and time-consuming. Thus a experimental platform for CBHD optical pick-up servo system are designed in this paper, and an user-friendly interface for IIR parameters adjustment is given. Experimental results showed that this control system has good servo characteristics in time-domain and frequency-domain.

Paper Details

Date Published: 2 December 2010
PDF: 13 pages
Proc. SPIE 7851, Information Optics and Optical Data Storage, 78510H (2 December 2010); doi: 10.1117/12.870512
Show Author Affiliations
Yingchao Cui, Tsinghua Univ. (China)
Xuemin Cheng, Tsinghua Univ. (China)
Jianshe Ma, Tsinghua Univ. (China)
Xinnan Hou, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 7851:
Information Optics and Optical Data Storage
Feijun Song; Shiquan Tao; Francis T. S. Yu; Suganda Jutamulia; Kees A. Schouhamer Immink; Keiji Shono, Editor(s)

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