Quadruple-stage actuator system for magnetic-head positioning system in hard disk drives

T Atsumi, S Yabui - IEEE Transactions on Industrial Electronics, 2019 - ieeexplore.ieee.org
In this article, we present a magnetic-head positioning system in hard disk drives (HDDs)
with a quadruple-stage actuator system. The quadruple-stage actuator system consists of a …

Neuro-controller design by using the multifeedback layer neural network and the particle swarm optimization

R Coban, IO Aksu - Tehnički vjesnik, 2018 - hrcak.srce.hr
Sažetak In the present study, a novel neuro-controller is suggested for hard disk drive (HDD)
systems in addition to nonlinear dynamic systems using the Multifeedback-Layer Neural …

Experimental evaluation of triple-stage-actuator system with thermal actuator for hard disk drives

T Atsumi, S Nakamura, M Odai, I Naniwa… - Journal of Advanced …, 2013 - jstage.jst.go.jp
To improve positioning accuracy in a head-positioning control system for hard disk drives,
we have developed a triple-stage-actuator system on a spin-stand tester. In this system, the …

Feedforward control for track-seeking control in hard disk drive with sampled-data polynomial based on first-order hold

K Igarashi, R Igarashi, T Atsumi… - 2021 IEEE International …, 2021 - ieeexplore.ieee.org
To decrease the seek time of hard disk drives (HDDs), we proposed a feedforward control
method by using a sampled-data polynomial based on a first-order hold (FOH). The …

Loop-Shaping Technique for Quadruple-Stage Actuator System in Hard Disk Drive

T Atsumi, S Yabui - IEEE Transactions on Industry Applications, 2023 - ieeexplore.ieee.org
The future of the cloud service is dependent on the hard disk drive (HDD) capacity growth
because demands for the data capacity in the cloud service are rapidly increasing. To solve …

Minimization of unobservable oscillation in repeatable run-out for magnetic-head positioning system of hard disk drives

T Atsumi - Mechatronics, 2017 - Elsevier
A positioning control system for a magnetic head in hard disk drives (HDDs) is a sampled-
data control system that has a sampler and a hold. As a result, the control system has …

Benchmark problem for magnetic-head positioning control system in HDDs

T Atsumi - IFAC-PapersOnLine, 2023 - Elsevier
Abstract In the" Cloud Era", the data capacity of the hard disk drive (HDD) must grow to
develop the cloud. As a result, we must improve the positioning accuracy of the magnetic …

Magnetic-head positioning control of HDDs with improved H∞ controller by Robust Controller Bode (RCBode) plot

J Ito, T Atsumi - Journal of Advanced Mechanical Design, Systems …, 2018 - jstage.jst.go.jp
In this paper, we present a robust controller design method for a magnetic-head positioning
system in a hard disk drive (HDD) based on the H∞ control theory and the Robust Controller …

Vibration control with thin-film-coil actuator for head-positioning system in hard disk drives

T Atsumi, K Suzuki, S Nakamura… - Journal of Advanced …, 2015 - jstage.jst.go.jp
In a head-positioning system of hard disk drives, various mechanical resonances may
degrade performance or stability of the control system. In these mechanical resonances, a …

Optimization Method for Magnetic-Head Positioning Control System in HDD Against Unexpected Plant Perturbations by Using Data Mining Techniques

T Atsumi, S Yabui, S Nakadai - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In this article, we propose a data-mining optimization method for a magnetic-head
positioning control system in the hard disk drive (HDD) against unexpected plant …