Digital processing of position error signal in hard disk drives

2004 ◽  
Author(s):  
A. Al Mamun ◽  
G.X. Guo ◽  
K.C. Tan ◽  
Yimei Liu
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Digital Processing ◽  
Position Error ◽  
Disk Drives ◽  
Error Signal ◽  
Position Error Signal

Measurement and monitoring of hard disk drive spindle motor bearing parameters using position error signal

2006 ◽  
Vol 220 (9) ◽  
pp. 1449-1453 ◽  
Author(s):  
B Hredzak ◽  
G Guo ◽  
J Zhang
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Surface ◽  
Spindle Motor ◽  
Position Error ◽  
Error Signal ◽  
Position Error Signal ◽  
Displacement Sensors ◽  
Acceleration Sensors ◽  
Stiffness And Damping

Current methods used for the measurement of stiffness and damping of spindle motor bearings used in hard disk drives use a vibration base driven by an external actuator. Acceleration sensors and displacement sensors installed onto the vibration base are then used to measure the acceleration and the spindle runout, respectively. Outputs from these sensors are analysed and used for the calculation of the stiffness and damping. The method, used for direct measurement and monitoring of total stiffness and damping, and proposed in this article does not require the use of any additional external sensors, neither does it require a vibration base driven by an external actuator. Vibration is generated by introducing a known value of imbalance onto the spindle motor. The vibration generated is then measured by reading and analysing the position error signal written on the disk surface and subsequently, used to calculate the total stiffness and damping. Experimental results verifying the proposed method are presented.

Digital Processing of Dual-Frequency Servo Burst in Hard Disk Drives

2005 ◽  
Vol 54 (4) ◽  
pp. 1354-1360 ◽  
Author(s):  
A. AlMamun ◽  
G. Guo ◽  
K.C. Tan ◽  
Y. Liu
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Digital Processing ◽  
Disk Drives ◽  
Dual Frequency

Prediction of position error signal of a hard disk drive undergoing a long seek

2009 ◽  
Vol 15 (10-11) ◽  
pp. 1563-1581 ◽  
Author(s):  
Tsung-Liang Wu ◽  
Chaw-Wu Tseng ◽  
Chen-Chi Lin ◽  
Shahab Hatam Tabrizi ◽  
I. Y. Shen
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Position Error ◽  
Error Signal ◽  
Position Error Signal

Digital servo architecture with 8.8 bit resolution of position error signal for disk drives

1999 ◽  
Vol 21 (2) ◽  
pp. 108
Author(s):  
Hiroshi Kimura ◽  
Takushi Nishiya ◽  
Takashi Nara ◽  
Tatsuya Komatsu
Keyword(s):  
Position Error ◽  
Disk Drives ◽  
Error Signal ◽  
Position Error Signal
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