Premium
Fast‐seeking control for two‐stage actuator system in optical disk drives
Author(s) -
Okuyama Atsushi
Publication year - 2012
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.21244
Subject(s) - actuator , lens (geology) , optical disc , pickup , observer (physics) , control system , mode (computer interface) , computer science , control theory (sociology) , control (management) , optics , engineering , physics , simulation , electrical engineering , artificial intelligence , quantum mechanics , image (mathematics) , operating system
A new fast‐seeking control method for the two‐stage actuator system in an optical disk drive has been developed. Fast seeking is performed by means of velocity control in two modes. The lens velocity in the first mode, which is estimated using a multirate observer, is equal to the pickup unit velocity, and it is controlled in order to prevent the lens from vibrating. The lens velocity in the second mode is equal to the specified target velocity, and it is controlled in order to improve the laser‐spot positioning accuracy. A DVD‐ROM drive is tested to confirm that the control system we propose significantly improves the seeking capabilities. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 180(3): 64–71, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21244