Method and apparatus for controlling the position of an object a

Details Method and apparatus for controlling the position of an object a Method and apparatus for controlling the position of an object a

1996-05-24

1998-09-22

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 318562, 364150, G11B 5596

Patent

active

058123393

ABSTRACT:
A position control method for use with a hard disk drive or other rotating body is provided. A radial position of a rotating body corresponding to an object to be controlled is detected as a current object position. Subsequently, a control operation signal is generated which is representative of a deviation between a target object position expressed in terms of the radial position of the rotating body and the current object position detected. In addition, an actuator manipulation-amount signal is output which is derived from the control operation signal. This actuator manipulation-amount signal is formed by selectively summing an integration signal with either a first or a second control signal. The first control signal is a function of the current object position. The second control signal is a function of a predicted object position at a second predetermined time after generation of the control operation signal. At intervals of a first predetermined time, this process is repeated such that movement of the object by an actuator is controlled by the actuator manipulation-amount signal. A position control apparatus and information recording system which implement this position control method are also provided.

REFERENCES:
patent: 5444582 (1995-08-01), Suzuki
patent: 5481568 (1996-01-01), Yada
Translation of Abstract of Japanese Patent No. JP 401173483A; Inventor Takahashi Applicant: Sony; Application JP 62332933, Filed Dec. 28, 1987, Jul. 10, 1989.
Shingaku Journal, vol. J76-A, No. 3 pp. 364-371, Dec. 1993.
Abstract of German Patent No. DE 004407472A1, Speed and Position Estimator; Inventor--Mark W. Leaper, Nov. 1994.

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