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- W2088750708 abstract "In magnetic disk drives, mechanical resonance modes prevent a higher bandwidth servo being used for head positioning control. To overcome this limitation and realize more precise head positioning, a strain feedback controller which is added to a conventional head-position feedback loop was developed. The controller of a strain-feedback control system was designed so that the gain and the phase delay of the sensitivity function of the strain-feedback control system were both reduced below the frequency of a primary mechanical resonance. The controller achieves gain suppression by about 10dB at a primary mechanical resonance and phase delay of about zero degrees. It was found that the head-position control system (i.e., the strain feedback plus the conventional head-position feedback loop) increases the servo bandwidth by 17% and improves the positioning accuracy by 18%. It was also confirmed that unlike conventional servo system, the new servo design does not suffer degradation of servo characteristics at high temperature." @default.
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- W2088750708 date "2003-01-01" @default.
- W2088750708 modified "2023-09-26" @default.
- W2088750708 title "A Higher Bandwidth Servo Design for Magnetic Disk Drives: A Head-positioning Control System with Strain Feedback Control" @default.
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- W2088750708 doi "https://doi.org/10.1541/ieejias.123.1321" @default.
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