High-bandwidth control of the head-positioning mechanism in a Winchester disk drive

High-bandwidth control of the head-positioning mechanism in a Winchester disk drive

Modern disk drives use fast voice coil actuators for the positioning of magnetic heads onto desired tracks and for keeping them on track against various disturbances by closed-loop control. Problems stem from high-desired control bandwidth (∼ 1 kHz) requiring digital signal processing rates above 10...

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Veröffentlicht in:IEEE Control Systems Magazine 1987-10, Vol.7 (5), p.15-19
Hauptverfasser: Hanselmann, H., Moritz, W.
Format: Artikel
Sprache:eng
Schlagworte:
Assembly
Coils
Disk drives
Hydraulic actuators
Magnetic field measurement
Magnetic heads
Pneumatic actuators
Target tracking
Vibrations
Winches
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Beschreibung
Zusammenfassung:Modern disk drives use fast voice coil actuators for the positioning of magnetic heads onto desired tracks and for keeping them on track against various disturbances by closed-loop control. Problems stem from high-desired control bandwidth (∼ 1 kHz) requiring digital signal processing rates above 10 kHz and from complexity due to structural mechanics effects.
ISSN:0272-1708
2374-9385
DOI:10.1109/MCS.1987.1105360