Radial fine seek control with fault protection in a digital versatile disc player
Resource
Mechatronics 15: 129-150
Journal
Mechatronics
Journal Volume
15
Journal Issue
2
Pages
129-150
Date Issued
2005
Author(s)
Abstract
The paper proposes a fine seek servo controller for the digital versatile disk (DVD). The proposed control is an integration of a hybrid track position detector, a position accumulator, a position profile generator, a control finite state machine, an estimator, a defect detector, an RFRP signal compensator, a tracking servo equalizer (for both track-following and fine-seek) and a sled servo equalizer. The integration of these blocks enables a wider range of pull-in area for the servo to switch from track seeking to track following. The implementation results show that the proposed control achieves better performance over the conventional velocity control approach. The experimental results also demonstrated the ability of the control to effectively deal with disks with defects or fingerprints. © 2004 Elsevier Ltd. All rights reserved.
Type
journal article