Study at TCU


Name YABUI Shota
Official Title Associate Professor
Affiliation Tokyo City University
Profile Shota Yabui received the B.S. and M.S. degrees from Mie University, Mie, Japan, in 2007 and 2009, respectively, and Ph.D. degrees from Hokkaido University, Hokkaido, Japan, in 2014, respectively. From 2009 to 2015, he has worked for Hitachi Ltd. and HGST Japan to develop control technologies for hard disk drives. At 2016, he has worked for Mitsubishi Space Software Co.,Ltd. to analyze flight dynamics for Mitsubishi regional jet. From 2017 to 2020, he has worked as an assistant professor with the Department of Mechanical Systems Engineering, School of Engineering, Nagoya University. From 2021, he has worked as an associate professor with the Department of Mechanical Systems Engineering, Faculty of Science and Engineering, Tokyo city university. His research interests include adaptive feed-forward control technologies, integrated design method of control and mechanics and analysis of rotor dynamics.
Research Field(Keyword & Summary)
  1. (1) Nanoscale servo control in hard disk drive (HDD)

    In order to realize Society 5.0, it is desired to increase the recording capacity of the HDD. The recording capacity depends on the accuracy of the positioning control system of the magnetic head that reads and writes data on the disk. Therefore, I have been conducting research on nanoscale servo control to improve the positioning accuracy of the magnetic head of HDDs.

  2. (2) Control method that compensates for rotational synchronous vibration using Active magnetic bearing

    Typical vibrations in rotating machines are vibrations synchronized with rotation, and research to compensate for it using AMB is being vigorously pursued. In this research, we first developed an optimal design method in terms of both stability and control performance based on the Nyquist diagram. This makes it possible to optimize with a common evaluation index called frequency response regardless of the control method.

Representative Papers
  1. 1. Yabui, S., Inoue, H., and Inoue, T. (February 1, 2021). "Track-Following Controller Design Using an Active Magnetic Bearing for Measurement of the Rotor Dynamics Coefficient of the Annular Seal." ASME. J. Dyn. Sys., Meas., Control. June 2021; 143(6)
  2. 2. Yabui S, Inoue H, Inoue T. Control scheme of adaptive feedforward cancellation considering of Bode’s integral theorem for synchronous vibration suppression in rotating machineries. Journal of Vibration and Control. September 2020.
  3. 3. S.Yabui, T.Atsumi and T.Inoue, 2020, "Coupling Controller Design for MISO System of Head Positioning Control Systems in HDDs", IEEE Transactions on Magnetics, vol.56, no.5, pp. 1-9
  4. 4. Takenori Atsumi and Shota Yabui, ``Quadruple-Stage Actuator System for Magnetic-Head Positioning System in HDDs'', The IEEE Transactions on Industrial Electronics, Vol. 67, No. 11, pp. 9184-9194
  5. 5. S Yabui, J Chiba, T Suzuki, S Tomimatsu, T Inoue, Analysis of Whirling Vibration Due to Morton Effect by Using Frequency Transfer Function Model in Journal Bearings, Journal of Dynamic Systems, Measurement, and Control, 142(4), 2020
  6. 6. S. Yabui, T. Atsumi, T. Inoue, AFC with gain adjustment in control system in HDDs for compensation of speaker‐induced vibration, IEEJ Transactions on Electrical and Electronic Engineering, online first, 2020
  7. 7. S. Yabui, T. Atsumi, T. Inoue, Compensation of mechanical resonances by adaptive feed-forward cancellation for head positioning control system in hard disk drives, Journal of Advanced Mechanical Design, Systems, and Manufacturing, 13(4), 2019
  8. 8. S. Yabui, T. Inoue: Development of Adaptive Feed-Forward Cancellation with Frequency Estimation Algorithm for Compensation of Periodic Disturbance at Arbitrary Frequency, Journal of Dynamic Systems, Measurement, and Control 141(12), 2019
  9. 9. S. Yabui, T. Inoue: Adaptive feedforward cancellation with gain and damping control system considering helium leakage in HDDs, Journal of SN Applied Sciences, 1(10), 2019
  10. 10. S. Yabui, T. Inoue: Development of a Measurement System for Analyzing Periodic External Forces Acting on Rotating Machineries, Journal of Dynamic Systems, Measurement, and Control 141(10), 2019
Award (1) 2012 JSME Best presentation award
(2) 2013 JSME Incentive award
(3) IECON 2015 Best presentation award
(4) 2015 JSME Distinguished Paper Award
(5) The 62th Japan Joint Automatic Control Conference Best presentation award
(6) SAMCON2020 Outstanding Paper Award
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) (1) IEEJ: Senior member
(2) JSME: Member
(3) ASME: Member
(4) IEEE: Member
Education Field (Undergraduate level) Control engineering, Vibration engineering, System identification, Digital signal processing
Education Field (Graduate level) Mechanical engineering,