On the robust controller design for Hard Disk Drive servo systems with time delays
Author
Yan, P.
Özbay, Hitay
Date
2013Source Title
Proceedings of the European Control Conference, IEEE 2013
Publisher
IEEE
Pages
1286 - 1291
Language
English
Type
Conference PaperItem Usage Stats
180
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151
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Abstract
Due to the existence of various sources of delays, the dynamical model of HDD (Hard Disk Drive) servo systems is actually infinite dimensional, although most of the control algorithms simplified the model with Padé expansions or other finite dimensional approximations. In this paper, a robust loop shaping algorithm is developed for the HDD model with delays by using an h ∞ synthesis approach for infinite dimensional systems. The h∞ controller is derived with a structure of an internal feedback loop including an FIR (Finite Impulse Response) filter and an IIR (Infinite Impulse Response) filter, which facilitates non-fragile implementations. Comparisons to other robust control methods are given and the advantages of this approach are demonstrated in terms of improvement of TMR (track misregistration) and tracking TPI (Track-per-Inch) capability.
Keywords
Finite dimensional approximationFinite-impulse response
Hard disk drive servo system
Infinite impulse response
Infinite-dimensional system
Internal feedback loop
Robust control methods
Robust controller design
Algorithms
Controllers
IIR filters
Impulse response
Robust control
Servomechanisms
Hard disk storage
Permalink
http://hdl.handle.net/11693/27927Published Version (Please cite this version)
https://www.doi.org/10.23919/ECC.2013.6669554Collections
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