Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-09-27
2005-09-27
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S077040
Reexamination Certificate
active
06950274
ABSTRACT:
A disk storage apparatus includes: an actuator positioning a head with respect to a disk; a drive device driving the actuator; a voltage detection device detecting a voltage signal induced in driving the actuator; a disturbance estimation unit estimating the magnitude of load disturbance exerted on the head from a drive signal and the voltage signal, and outputting a disturbance estimation signal; a filter unit cutting off a high frequency component of the disturbance estimation signal, and outputting a filter signal; a position detection unit producing a position error signal corresponding to a current position of the head; a position control unit producing a position control signal based on the position error signal; and a correction unit outputting the drive signal based on the filter signal and the position control signal, and the apparatus controls stable positioning of the head against a resistance value fluctuation of a drive coil of the actuator and a resistance value change.
REFERENCES:
patent: 4246536 (1981-01-01), Bradley et al.
patent: 4679103 (1987-07-01), Workman
patent: 4947093 (1990-08-01), Dunstan et al.
patent: 4954905 (1990-09-01), Wakabashi et al.
patent: 5483438 (1996-01-01), Nishimura
patent: 5491394 (1996-02-01), Harwood et al.
patent: 5602688 (1997-02-01), Yokoyama et al.
patent: 5654840 (1997-08-01), Patton et al.
patent: 5781363 (1998-07-01), Rowan et al.
patent: 5844743 (1998-12-01), Funches
patent: 5844744 (1998-12-01), Suzuki et al.
patent: 5923491 (1999-07-01), Kisaka et al.
patent: 5949608 (1999-09-01), Hunter
patent: 6097564 (2000-08-01), Hunter
patent: 6359748 (2002-03-01), Goker
patent: 6549349 (2003-04-01), Sri-Jayantha et al.
patent: 6661599 (2003-12-01), Chen et al.
patent: 0 509 545 (1992-10-01), None
patent: 0 735 522 (1996-10-01), None
patent: 05-62385 (1993-03-01), None
patent: 09-231701 (1997-09-01), None
patent: 2714149 (1997-10-01), None
patent: P2996772 (1999-10-01), None
patent: WO 00/68938 (2000-11-01), None
Inaji Toshio
Kohso Hiroshi
Miyata Keizo
Umeda Makoto
Hudspeth David
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
Tzeng Fred F.
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