Track following control of large capacity flexible disk drive with disturbance observer using two position sensors

1999 ◽  
Author(s):  
J. Ueda ◽  
A. Imagi ◽  
H. Tamayama
Keyword(s):  
Disturbance Observer ◽  
Disk Drive ◽  
Large Capacity ◽  
Flexible Disk

Track Following Control for Large Capacity Flexible Disk Drives -Disturbance Observer Design using Two Position Sensors-

2003 ◽  
Vol 15 (4) ◽  
pp. 458-468
Author(s):  
Jun Ueda ◽  
◽  
Akihiko Imagi ◽  
Hitoshi Tamayama ◽  
Tsuneo Yoshikawa ◽  
...  
Keyword(s):  
Disturbance Observer ◽  
Design Method ◽  
Open Loop ◽  
Observer Design ◽  
Large Capacity ◽  
Storage Devices ◽  
Loop Design ◽  
Backward Compatibility ◽  
Flexible Disk ◽  
Two Degree Of Freedom

Storage devices require highly accurate positioning performance to cope with disturbance friction force and vibration. In this paper, a novel configuration of realizing a two-degree-of-freedom (2DOF) track following controller with a disturbance observer is proposed for large capacity FDDs with backward compatibility. The controller is designed using two position sensors, one of them is used to handle low density disks. Furthermore, a new open loop design method is applied to choose the stable parameter against unmodeled dynamics. The validity of the proposed scheme has been confirmed by experiments.

Vibration Characteristics of a Rotor-Flexible Disk System: In Case of HDD Spindle-Motor System

1999 ◽  
Author(s):  
D. C. Han ◽  
S. H. Choi ◽  
K. B. Park ◽  
S. C. Jung
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle Motor ◽  
Vibration Characteristics ◽  
Rotating Shaft ◽  
Disk System ◽  
Assumed Mode Method ◽  
Mode Method ◽  
Flexible Disk

Abstract In this paper we investigate the vibration characteristics of a rotor system with flexible disks. The coupled vibration mode between rotating shaft and the flexible disk are analyzed for lateral and axial vibrations respectively. Gyro and sheer effects are considered for the modeling of lateral vibrations. An assumed mode method was used for the disk modeling considering gyro effects. For a numerical example hard disk drive is considered. The natural frequencies of the motor-spindle system with flexible disk of hard disk drive was calculated and compared to the experimental data.

Design of a large capacity disk drive with two actuators

1983 ◽  
Vol 19 (5) ◽  
pp. 1695-1697 ◽  
Author(s):  
J. Naruse ◽  
M. Tsutsumi ◽  
T. Tamura ◽  
Y. Hirano ◽  
T. Hayama ◽  
...  
Keyword(s):  
Disk Drive ◽  
Large Capacity

Vibration analysis of a contact slider/gimbal of a flexible disk drive

2002 ◽  
Vol 9 (1-2) ◽  
pp. 41-47 ◽  
Author(s):  
Y. Muraoka ◽  
H. Ryoson ◽  
T. Kawashima ◽  
M. Kondo ◽  
Y. Kaneta ◽  
...  
Keyword(s):  
Vibration Analysis ◽  
Disk Drive ◽  
Flexible Disk ◽  
Contact Slider

A 16MB 3.5 inch Ba-Ferrite flexible disk drive with dual track following servo modes

1987 ◽  
Vol 23 (5) ◽  
pp. 2680-2682 ◽  
Author(s):  
T. Yamada ◽  
Y. Sakai ◽  
T. Muraoka ◽  
T. Sugaya
Keyword(s):  
Disk Drive ◽  
Flexible Disk
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