Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-03-22
2005-03-22
Ometz, David (Department: 2655)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053180, C369S053230, C369S053330
Reexamination Certificate
active
06870801
ABSTRACT:
A track servo control perform follow-up control of an optical beam to a track of an optical disk, and control the vibration of the optical beam due to the ID pit noise of the optical disk. The control system is comprised of a feedback control block for feedback-controlling the actuator by the track error signal from the actuator and the learning control block. Since the optical disk ID pit noise is periodic noise, the learning control block learns this, inputs the learning result to the feedback control system. The learning result is subtracted from the learning input, and the signal after subtraction is learned in order to converge the learning. Therefore even if the periodic ID pit noise is applied, this noise can be removed from the control loop and the vibration of the actuator due to periodic noise can be decreased, making a stable track follow-up operation possible.
REFERENCES:
patent: 5233586 (1993-08-01), Morisada
patent: 6172960 (2001-01-01), Takemura et al.
patent: 6628579 (2003-09-01), Watanabe et al.
patent: 1 043 715 (2000-10-01), None
patent: 60-39365 (1985-03-01), None
patent: 63-298734 (1988-12-01), None
patent: 3-230370 (1991-10-01), None
patent: 4-232617 (1992-08-01), None
patent: 05258383 (1993-10-01), None
patent: 6-76303 (1994-03-01), None
patent: 8-255436 (1996-10-01), None
patent: 8-287478 (1996-11-01), None
patent: 10-188290 (1998-07-01), None
patent: 11-203795 (1999-07-01), None
patent: 11-306699 (1999-11-01), None
patent: 2000-200449 (2000-07-01), None
patent: 2000339729 (2000-12-01), None
patent: 2001-23177 (2001-01-01), None
Ikai Yoshiaki
Yamashita Tomonori
Yanagi Shigenori
Fujitsu Limited
Greer Burns & Crain Ltd.
Ometz David
Ortiz-Criado Jorge L.
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