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      • Department of Electrical and Electronics Engineering
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      On the robust controller design for Hard Disk Drive servo systems with time delays

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      Author
      Yan, P.
      Özbay, Hitay
      Date
      2013
      Source Title
      Proceedings of the European Control Conference, IEEE 2013
      Publisher
      IEEE
      Pages
      1286 - 1291
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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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 approximation
      Finite-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/11693/27927
      Published Version (Please cite this version)
      https://www.doi.org/10.23919/ECC.2013.6669554
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      • Department of Electrical and Electronics Engineering 3605
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