Dual-stage servo with on-slider PZT microactuator for hard disk drives

Dual-stage servo with on-slider PZT microactuator for hard disk drives

A dual-stage servo system with an on-slider piezoelectric (PZT) microactuator is developed for future high-density hard disk drives. The parallel control scheme is used in servo design with considerations over the stroke limitation and the hysteresis of the microactuator. Experimental results on a s...

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Veröffentlicht in:IEEE transactions on magnetics 2002-09, Vol.38 (5), p.2183-2185
Hauptverfasser: Yaolong Lou, Peng Gao, Bin Qin, Guoxiao Guo, Eng-Hong Ong, Takada, A., Okada, K.
Format: Artikel
Sprache:eng
Schlagworte:
Actuators
Applied sciences
Bandwidth
Displacement measurement
Electronics
Exact sciences and technology
Frequency measurement
Hard disks
Magnetic and optical mass memories
Magnetic heads
Magnetic hysteresis
Magnetism
Microactuators
Other magnetic recording and storage devices (including tapes, disks, and drums)
Servomechanisms
Storage and reproduction of information
Vibrometers
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Beschreibung
Zusammenfassung:A dual-stage servo system with an on-slider piezoelectric (PZT) microactuator is developed for future high-density hard disk drives. The parallel control scheme is used in servo design with considerations over the stroke limitation and the hysteresis of the microactuator. Experimental results on a spin-stand with a laser Doppler vibrometer as the position sensor demonstrate that the system has a servo bandwidth higher than 4 kHz and has disturbance rejection capability up to near 5 kHz.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2002.801860