Activator control method and apparatus for positioning a transdu

Details Activator control method and apparatus for positioning a transdu Activator control method and apparatus for positioning a transdu

1993-10-26

1995-10-17

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7812, G11B 5596

Patent

active

054596246

ABSTRACT:
A phase plane trajectory trough method and apparatus for fast settling of a data transducer for positioning a transducer head over a selected track on a disk surface are provided for use in a disk file. The disk file includes at least one disk mounted for rotation about an axis and the disk has at least one disk surface including a plurality of data tracks for storing data. An actuator moves the transducer head from one track location to another track location. A controller is coupled to the actuator for applying a gain control signal to control movement of the actuator. A phase plane trajectory trough function is defined for the disk file. Velocity and position states of the actuator are estimated and compared with the phase plane trajectory trough function for generating a base correction factor. The controller is responsive to both the estimated velocity and position states and the phase plane trajectory trough (PPTT) function for modifying the gain control signal.

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Palmer, R. S., "Fast Eigenvector Control of a Disk File Actuator", Apr. 1980, pp. 5069-5075, vol. 22, No. 11.

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