scholarly journals Head Positioning Control of a Hard Disk Drive Using H^|^infin; Control Theory

1993 ◽  
Vol 29 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Mitsuo HIRATA ◽  
Kang-Zhi LIU ◽  
Tsutomu MITA ◽  
Takashi YAMAGUCHI
Keyword(s):  
Control Theory ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Positioning Control ◽  
Head Positioning

Head-Positioning Control of Hard Disk Drives Through the Integrated Design of Mechanical and Control Systems

2009 ◽  
Vol 3 (3) ◽  
pp. 277-285 ◽  
Author(s):  
Takenori Atsumi ◽  
Keyword(s):  
Control Systems ◽  
Hard Disk Drives ◽  
Integrated Design ◽  
Hard Disk ◽  
Disk Drive ◽  
Nanometer Scale ◽  
Disk Drives ◽  
Positioning Control ◽  
Head Positioning ◽  
And Control

A Hard Disk Drive (HDD) is an inexpensive mass-production product, but the head-positioning control systems of HDDs require nanometer-scale positioning performance. Therefore, we have studied head-positioning control systems of HDD using designs which integrate mechanical and control systems to improve their control performance while curbing cost increases. In this paper, we introduce “disturbance suppression in high-frequency ranges through phase stable design for high-order mechanical resonances” and “high servo-bandwidth design through mode shape design of mechanical resonance” as examples of techniques that have been developed and are easily applied to products.

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