Recent control technologies for fast and precise servo system of hard disk drives

Author(s):  
T. Yamaguchi ◽  
S. Nakagawa
Author(s):  
Jianbin Nie ◽  
Roberto Horowitz

This paper discusses the design and implementation of two track-following controllers for dual-stage hard disk drive servo systems. The first controller is designed by combining an outer loop sensitivity-decoupling (SD) controller with an inner loop disturbance observer (DOB). The second is designed by combining mixed H2/H∞ synthesis techniques with an add-on integral action. The designed controllers were implemented and evaluated on a disk drive with a PZT-actuated suspension-based dual-stage servo system. Position error signal (PES) for the servo system was obtained by measuring the slider displacement with an LDV and injecting a simulated track runout.


1992 ◽  
Vol 28 (5) ◽  
pp. 2910-2912 ◽  
Author(s):  
T. Yamaguchi ◽  
K. Shishida ◽  
H. Hirai ◽  
K. Tsuneta ◽  
M. Sato

2020 ◽  
Vol 248 ◽  
pp. 119216
Author(s):  
Laura Talens Peiró ◽  
Alejandra Castro Girón ◽  
Xavier Gabarrell i Durany

2002 ◽  
Vol 68 (667) ◽  
pp. 720-727 ◽  
Author(s):  
Hiromitsu MASUDA ◽  
Toshihiko SHIMIZU ◽  
Mikio TOKUYAMA ◽  
Haruhide TAKAHASHI ◽  
Kousaku WAKATSUKI ◽  
...  

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