Optimal sliding mode dual-stage actuator control for magnetic disk drives

2004 ◽  
Author(s):  
Seung-Hi Lee ◽  
Chung Choo Chung
Keyword(s):  
Sliding Mode ◽  
Disk Drives ◽  
Magnetic Disk ◽  
Dual Stage ◽  
Actuator Control ◽  
Dual Stage Actuator

Optimal Sliding Mode Dual-Stage Actuator Control in Computer Disk Drives

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Seung-Hi Lee
Keyword(s):  
Discrete Time ◽  
Sliding Mode ◽  
Voice Coil Motor ◽  
Disk Drives ◽  
Flexible Mode ◽  
Control Scheme ◽  
Dual Stage ◽  
Actuator Control ◽  
Dual Stage Actuator ◽  
Computer Disk

This paper presents a discrete-time design of a dual-stage actuator control system with sliding mode for computer disk drives. A state estimator based discrete-time boundary layer sliding mode control scheme is developed for a dual-stage actuator, which consists of a voice coil motor and a microactuator. Considering dominant microactuator flexible mode dynamics and the interaction between the two actuators, an optimal sliding hyperplane is designed to maximize their cooperation so as to attain desired responses. An application example demonstrates the utility of the proposed sliding mode dual-stage actuator control scheme for track-seek in the microactuator range, settle, and track-follow.

Effect of dual-stage actuator on positioning accuracy in 10 k rpm magnetic disk drives

2001 ◽  
Vol 37 (2) ◽  
pp. 955-958 ◽  
Author(s):  
S. Koganezawa ◽  
T. Hara ◽  
Y. Uematsu ◽  
T. Yamada
Keyword(s):  
Disk Drives ◽  
Positioning Accuracy ◽  
Magnetic Disk ◽  
Dual Stage ◽  
Dual Stage Actuator

Dual-stage actuator system for magnetic disk drives using a shear mode piezoelectric microactuator

1999 ◽  
Vol 35 (2) ◽  
pp. 988-992 ◽  
Author(s):  
S. Koganezawa ◽  
Y. Uematsu ◽  
T. Yamada ◽  
H. Nakano ◽  
J. Inoue ◽  
...  
Keyword(s):  
Shear Mode ◽  
Disk Drives ◽  
Magnetic Disk ◽  
Dual Stage ◽  
Actuator System ◽  
Dual Stage Actuator
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