Title :
Effect of dual-stage actuator on positioning accuracy in 10 k rpm magnetic disk drives
Author :
Koganezawa, Shinji ; Hara, T. ; Uematsu, Y. ; Yamada, T.
Author_Institution :
Dept. of Mechatronics Dev., Fujitsu Labs. Ltd., Kawasaki, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
We have developed a piezoelectric microactuator for dual-stage actuator systems in magnetic disk drives. We installed the microactuator in one of Fujitsu´s 3.5-inch commercial drives for evaluation of the servo system of dual-stage actuator. The dual-stage actuator system achieved the nonrepeatable position error (NRPE) 3σ values of 0.036 μm. The dual-stage servo system reduced the NRPE by 35% compared with the conventional single actuator system even in HDD´s which has a high rotational speed of 10,000 rpm
Keywords :
disc drives; microactuators; piezoelectric actuators; servomechanisms; 3.5 in; 62 mg; 9 kHz; Fujitsu commercial drives; MEMS; dual-stage actuator; magnetic disk drives; nonrepeatable position error reduction; piezoelectric microactuator; positioning accuracy; servo system; shear deformation; Assembly; Bandwidth; Disk drives; Hard disks; Magnetic heads; Magnetic levitation; Microactuators; Piezoelectric actuators; Resonance; Servomechanisms;
Journal_Title :
Magnetics, IEEE Transactions on
