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Servo design for high-TPI computer disk drives using a delay-accommodating state estimator

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Abstract

A servo design method is presented for high track-density computer disk drives, in which the plant time delay, mainly due to the processor computation time, is taken into account. The key idea is to incorporate the delay model into the output equation of the state-space representation of the plant model. The application results confirm that the proposed method is very effective in enabling a higher servo bandwidth and, thereby, in realizing nano-level control accuracy required in high track-density computer disk drives.

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Acknowledgements

The authors would like to thank Storage Division, Samsung Electronics, Ltd., as well as Samsung Information System America, Inc. for their valuable help and continued support for this joint project.

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Author notes

  1. Young-Hoon Kim

    Present address: HDD R&D Center, Samsung Information Systems, 75 West Plumeria Dr., San Jose, CA, 95134, USA

Authors and Affiliations

  1. Storage Lab, Samsung Advanced Institute of Technology, Suwon, South Korea

    Young-Hoon Kim & Seong-Woo Kang

  2. HDD R&D Center, Samsung Information Systems, 75 West Plumeria Dr., San Jose, CA, 95134, USA

    Sang-Hoon Chu

Authors
  1. Young-Hoon Kim
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  2. Sang-Hoon Chu
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  3. Seong-Woo Kang
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Correspondence to Young-Hoon Kim.

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Kim, YH., Chu, SH. & Kang, SW. Servo design for high-TPI computer disk drives using a delay-accommodating state estimator. Microsyst Technol 11, 696–701 (2005). https://doi.org/10.1007/s00542-005-0548-y

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  • DOI: https://doi.org/10.1007/s00542-005-0548-y

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