Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-03-11
2000-09-05
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
318632, G11B 5596
Patent
active
061152056
ABSTRACT:
A method for adapting acceleration and deceleration of a disc drive transducer during movements between initial and target tracks on a disc surface to the maximum current available to drive an actuator whereon the transducer is mounted. During acceleration of the transducer, while the actuator current is substantially a maximum, the current supplied to the actuator coil is measured and a scale factor is determined as the square root of the ratio of the maximum current supplied to the actuator and a nominal current from which a velocity profile, used to effect velocity control of the movement, has been predetermined. Thereafter, the current supplied to the actuator is adjusted in a succession of time intervals by measuring the velocity of the transducer, determining a profile velocity in each interval from the velocity profile, generating a demand velocity by scaling the profile velocity by the scale factor, generating a correction signal from the difference of the measured and demand velocities, and supplying current to the actuator in proportion to the correction signal.
REFERENCES:
patent: 4355273 (1982-10-01), DuVall
patent: 4535372 (1985-08-01), Yeakley
patent: 4638230 (1987-01-01), Lee
patent: 4679103 (1987-07-01), Workmann
patent: 4827200 (1989-05-01), Ogura et al.
patent: 4835633 (1989-05-01), Edel et al.
patent: 4899234 (1990-02-01), Genheimer
patent: 5111349 (1992-05-01), Moon
patent: 5119250 (1992-06-01), Green et al.
patent: 5182684 (1993-01-01), Thomas et al.
patent: 5262907 (1993-11-01), Duffy et al.
patent: 5305161 (1994-04-01), Giovanetti et al.
patent: 5305447 (1994-04-01), Hampshire
patent: 5475545 (1995-12-01), Hampshire et al.
patent: 5475663 (1995-12-01), Ogino
R.K. Oswald "Design of a Disk File Head-Positioning Servo"; Nov. 1974; pp. 506-512.
Francis W. Sears, Mark W. Zemansky and Hugh D. Young; College Physics Sixth Edition; Jun. 1986; pp. 46-50 and pp. 544-548.
Hampshire Randall D.
Waugh David C.
Seagate Technology Inc.
Sniezek Andrew L.
LandOfFree
Method for adapting seeks of a disc drive transducer to the maxi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for adapting seeks of a disc drive transducer to the maxi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for adapting seeks of a disc drive transducer to the maxi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2218682