Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.mechatronics.2004.06.002
Title: Design and implementation of a dual-stage actuated HDD servo system via composite nonlinear control approach
Authors: Peng, K. 
Chen, B.M. 
Lee, T.H. 
Venkataramanan, V. 
Keywords: Actuators
Hard disk drives
Nonlinear control
Servo systems
Issue Date: Nov-2004
Source: Peng, K., Chen, B.M., Lee, T.H., Venkataramanan, V. (2004-11). Design and implementation of a dual-stage actuated HDD servo system via composite nonlinear control approach. Mechatronics 14 (9) : 965-988. ScholarBank@NUS Repository. https://doi.org/10.1016/j.mechatronics.2004.06.002
Abstract: We consider in this paper the design and implementation of a dual-stage actuated hard disk drive (HDD) servo system, in which an additional piezoelectric actuator is mounted on top of the conventional voice-coil-motor (VCM) actuator to provide a faster and finer response. More specifically, the dual-stage actuated HDD servo system consists of a primary VCM actuator and a secondary suspension piezoelectric microactuator. The VCM actuator is used to quickly move the read/write (R/W) head of the HDD servo system to a target track, whereas the microactuator is used to fine-tune the R/W head position when it is getting closer to the target. In our design, the primary actuator is controlled by a newly developed composite non-linear feedback (CNF) control law, which has fast rise time and small overshoot, and the microactuator is controlled through a simple static gain together with a low-pass filter and a notch filter. Simulation and implementation results show that in track following, the dual-stage actuated HDD servo system has outperformed the single-stage actuated counterpart by more than 47% in settling time and by 39% in position error signal (PES) tests. © 2004 Elsevier Ltd. All rights reserved.
Source Title: Mechatronics
URI: http://scholarbank.nus.edu.sg/handle/10635/55544
ISSN: 09574158
DOI: 10.1016/j.mechatronics.2004.06.002
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