Title :
Fast head positioning method of magnetic disk drives
Author :
Shishida, K. ; Yamaguchi, T. ; Hirai, H.
Author_Institution :
Hitachi Ltd., Ibaraki, Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
To improve the data rate of embedded-servo disk drives, data head switching at a high rate is required. To meet this requirement, a two-degree-of-freedom control method that compensates for the computation time delay and phase lag of filters is developed. This method reduces the head switching time by 50%
Keywords :
floppy discs; magnetic heads; magnetic recording; position control; servomechanisms; 5.25 inches; computation time delay; data rate; embedded-servo disk drives; filter phase lag; head positioning method; head switching time; magnetic disk drives; two-degree-of-freedom control method; Actuators; Delay effects; Disk drives; Feedforward systems; Filters; Inverse problems; Magnetic heads; Magnetic separation; Servomechanisms; Switches;
Journal_Title :
Magnetics, IEEE Transactions on
