NDLI: Track-Following Control of Four-Bar Structured HDD via Parameter-Dependent Low-Frequency Precompensation

Content Provider	IEEE Xplore Digital Library
Author	Guo, Y. Gao, T. Xie, L. Du, C. Ong, C. J.
Copyright Year	1965
Abstract	This paper considers track-following control of four-bar structured hard disk drive (HDD) systems. Compared with the traditional single-arm HDD, the four-bar structure potentially leads to higher achievable closed-loop bandwidth, but also brings challenges in control design due to nonlinearity. In track-following control design, exact linearization is impossible in practice due to mechanic resonances and measurement constraints. In this paper, instead of exact linearization, we propose a kind of prefilter to compensate for the low-frequency nonlinearities so that the compensated system has the same linear approximation at different track positions subjected to different high-frequency resonances. With this prefilter, many existing track-following control methods can be applied to the compensated plant. In this paper, $H_{\infty}$ loop shaping is used and simulation results show that the resulting controller preserves similar track-following performance at different track positions.
Sponsorship	IEEE Magnetics Society
Starting Page	2731
Ending Page	2737
Page Count	7
File Size	2417723
File Format	PDF
ISSN	00189464
Volume Number	49
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	track-following control Four-bar structure hard disk drive precompensation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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