Faculty Members

LANGUAGE ≫ Japanese
oka-koichi-1.jpg

Professor
OKA, Koichi

  • Gender: Male
  • Job titles:
    - Dean, School of Systems Engineering
    - Head, Intelligent Mechanical Engineering Course
    - Head, Aerospace Engineering Course
  • Affiliation:
    - School of Systems Engineering
    - Intelligent Mechanical Engineering Course, Department of Engineering, Graduate School of Enginering
    - Aerospace Engineering Course, Department of Engineering, Graduate School of Enginering
  • Personal web site: http://www.lab.kochi-tech.ac.jp/oka-lab/
Areas of specialization
Laboratory/research office Mechanical and Aerospace Control Systems Laboratory
This laboratory investigates control technology for a variety of systems, particularly magnetic suspension, aerospace and robotics. In control technology, numerical model expressions are used to formulate control strategies to get systems to achieve their intended purposes. This laboratory uses this approach to develop comprehensive control systems applying intelligent and optimal control, sensing technology, and driving and transforming mechanisms.
Current research topics
Educational background
Professional background
Licenses
Academic societies

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Courses

* Courses provided in English are shown with (E) mark

Undergraduate school
  • Graduation Thesis
  • Basic Control Systems
  • Feedback Control System
  • Rigid body dynamics
Graduate school
  • Seminar 1
  • Seminar 3
  • Individual Work for Graduate
  • Advanced Seminar 1
  • Advanced Seminar 2

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Research activities

Research papers
  1. Authors: Ren Mengyi, Koichi Oka
    Title: Design of a Noncontact Torsion Testing Device Using Magnetic Levitation Mechanism
    Journal: Actuators, Vol. 12, No. 4, MDPI
    Year: 2023
  2. Authors: Ren Mengyi, Koichi Oka
    Title: Adaptive sliding mode control of a magnetic levitation three-point bending device
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 71, No. S1, pp. S143-S155, IOS Press
    Year: 2023
  3. Authors: Shi Ce, Sun Feng, Xu Fangchao, Jin Junjie, Tong Ling, Zhou Qing, Koichi Oka
    Title: Analysis of position response characteristics of magnetic driven oil-free scroll compressor
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 71, No. S1, pp. S265-S274, IOS Press
    Year: 2023
  4. Authors: Ren Mengyi, Koichi Oka
    Title: Design of a Non-contact Bending Testing Device using Magnetic Levitation Mechanism
    Journal: IEEE Transactions on Industrial Electronics, Vol. 71, No. 2, pp. 1697-1707
    Year: 2023
  5. Authors: Chengcheng Xu, Fangchao Xu, Feng Sun, Xiaoyou Zhang, Junjie Jin, Boran Luan, Koichi Oka
    Title: Research on an Intelligent Control Method of a Magnetic Actuator for Micro Electrical Discharge Machining
    Journal: Actuators, Vol. 11, No. 12, MDPI
    Year: 2022
  6. Authors: Boran Luan, Xiaoyou Zhang, Fangchao Xu, Guang Yang, Junjie Jin, Chengcheng Xu, Feng Sun, Koichi Oka
    Title: High Precision Magnetic Levitation Actuator for Micro-EDM
    Journal: Actuators, Vol. 11, No. 12, MDPI
    Year: 2022
  7. Authors: Ce Shi , Feng Sun, Fangchao Xu, Junjie Jin, Ling Tong, Qing Zhou, Koichi Oka
    Title: Analysis of Trajectory Tracking Characteristics of a Magnetically Driven Oil‑Free Scroll Compressor
    Journal: Actuators, Vol. 312, No. 11, MDPI
    Year: 2022
  8. Authors: Ren Mengyi, Koichi Oka
    Title: Design and Analysis of a Non-Contact Tension Testing Device Based on Magnetic Levitation
    Journal: IEEE Access, Vol. 10, pp. 19312-19332, IEEE
    Year: 2022
  9. Authors: Chuan Zhao, Koichi Oka, Feng Sun, Akinori Harada, Junjie Jin, Ming Zhang
    Title: Design of Zero-power Control Strategy with Resisting Tilt of Hybrid Magnetic Levitation System
    Journal: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE
    Year: 2021
  10. Authors: James Lin, Koichi Oka, Akinori Harada
    Title: Zero-power tip-tilt control of a magnetically levitated platform by lateral displacement of hybrid-electromagnets
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 66, No. 1, pp. 63-74, IOS Press
    Year: 2021
  11. Authors: Koichi Oka, Kentaro Yamamoto, Akinori Harada
    Title: Magnetic suspension mechanism using rotary permanent magnets
    Journal: International Journal of Applied Electromagnetics and Mechanics 64 (2020) 977–983, Vol. 64, No. 1-4, pp. 977-983, IOS Press
    Year: 2020
  12. Authors: Chuan Zhao, Feng Sun, Junjie Jin, Hu Jing Tang, Fangchao Xu, Qian Li, Koichi Oka
    Title: Analysis of Quasi-Zero Power Characteristic for a Permanent Magnetic Levitation System with a Variable Flux Path Control Mechanism
    Journal:  IEEE/ASME Transactions on Mechatronics, IEEE/ASME
    Year: 2020
  13. Authors: Zhou Ran, Yan Mingyin, Guo Yongquan, Jin Junjie, Sun Feng, Zhang Xiaoyou, Koichi Oka
    Title: Suspension characteristics of a zero-power permanent magnetic suspension system with flux path control
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 63, No. 1, pp. 187-198, IOS press
    Year: 2020
  14. Authors: Nami Chiramathe, Koichi Oka, Masayuki Sato, Akinori Harada, Koji Muraoka
    Title: H-infinity Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
    Journal: International Journal of Aerospace Engineering, Vol. 2019, Hindawi
    Year: 2019
  15. Authors: Ming Zhang, Lijin Fang, Feng Sun, Koichi Oka
    Title: A Novel Wire-Driven Variable-Stiffness Joint Based on a Permanent Magnetic Mechanism
    Journal: Journal of Mechanisms and Robotics-Transactions of the ASME, Vol. 11, No. 5, pp. 051001-1-051001-9, ASME
    Year: 2019
  16. Authors: Sun Feng, Zhou Ran, Jin Junjie, Li Qiang, Xu Fangchao, Sun Xingwei, Koichi Oka
    Title: Optimal design for quasi-zero power performance of a permanent magnetic suspension system
    Journal: International Journal of Applied Electromagnetics and Mechanics, IOS Press
    Year: 2018
  17. Authors: Nami Chiramathe, Koichi Oka, Akinori Harada, 佐藤　昌之
    Title: H∞ Control-based CAS Design of QTW-UAVs Using Particle Swarm Optimization
    Journal: Trans. Japan Soc. Aero. Space Sci., Vol. 61, No. 5, pp. 226-229, 日本航空宇宙学会
    Year: 2018
  18. Authors: Akinori Harada, Tooru Ezaki, Tomoaki Wakayama, Koichi Oka
    Title: Air Traffic Efficiency Analysis of Airliner Scheduled Flights Using Collaborative Actions for Renovation of Air Traffic Systems Open Data
    Journal: Journal of Advanced Transportation, Vol. 2018, No. 2734763, Hindawi Publishing Corporation
    Year: 2018
  19. Authors: Annasiwaththa Annasi Waththege Buddhika Imantha, Koichi Oka, Akinori Harada
    Title: Magnetically levitated linear slider with a non-contact power transfer method
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 54, No. 2, pp. 223-237, IOS Press
    Year: 2017
  20. Authors: Eizentals Peteris, OKA Koichi
    Title: 3D pose estimation of green pepper fruit for automated harvesting
    Journal: Computers and Electronics in Agriculture, Vol. 128, pp. 127-140, Elsevier
    Year: 2016
  21. Authors: Annasiwaththa Annasi Waththege Buddhika Imantha, OKA Koichi
    Title: Design concept and analysis of a magnetically levitated linear slider with non-contact power transfer
    Journal: Int. J. of Applied Electromagnetics and Mechanics, Vol. 52, No. 1-2, pp. 207-213, IOS Press
    Year: 2016
  22. Authors: Junjie Jin, Duan Zhenyun, Sun Feng, Li Qing, Xia Pengpeng, Jin Jiaqi, OKA Koichi
    Title: Model identification and analysis for parallel permanent magnetic suspension system based on ARX model
    Journal: Int. J. of Applied Electromagnetics and Mechanics, Vol. 52, No. 1-2, pp. 145-152, IOS Press
    Year: 2016
  23. Authors: OKA Koichi, Tomohiro Okazaki, Toshiyuki Morimitsu
    Title: 2 DOF non-contact magnetic suspension system: A feasibility study
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 45, pp. 627-632, IOS Press
    Year: 2014
  24. Authors: BACHCHE Shivaji, OKA Koichi
    Title: Distinction of Green Sweet Peppers by Using Various Color Space Models and Computation of 3 Dimensional Location Coordinates of Recognized Green Sweet Peppers Based on Parallel Stereovision System
    Journal: Journal of System Design and Dynamics, Vol. 7, No. 2, pp. 178-196, 日本機械学会
    Year: 2013
  25. Authors: Zhong Xu, Feng Sun, Jun Jie, OKA Koichi
    Title: Proposal of Noncontact Operation Robotic Hand Using Permanent Magnetic Suspension
    Journal: Advanced Materials Research, Vol. 712-715, pp. 2277-2280, Scientific.Net
    Year: 2013
  26. Authors: BACHCHE Shivaji, OKA Koichi
    Title: Performance Testing of Thermal Cutting Systems for Sweet Pepper Harvesting Robot in Greenhouse Horticulture
    Journal: Journal of System Design and Dynamics, Vol. 7, No. 1, pp. 36-51, 日本機械学会
    Year: 2013
  27. Authors: SUN FENG, OKA Koichi, Junjie Jin
    Title: A zero suspension force improvement method of a permanent magnetic suspension device
    Journal: International Journal of Applied Electromagnetics and Mechanics, Vol. 41, No. 1, pp. 1-12, IOS press
    Year: 2013
  28. Authors: OKA Koichi, SUN FENG, JIN Junjie
    Title: Improvement Methods of Zero Suspension Force Performance of a Variable Flux Path Control Device
    Journal: 日本AEM学会誌, Vol. 20, No. 3, pp. 612-618, 養賢堂
    Year: 2012
  29. Authors: OKA Koichi, Feng Sun, Akira Tsurumi, Gota Nakamura
    Title: Study of the Spinning Mechanism Resulting from Permanent Magnet Linear Actuation
    Journal: Materials Science Forum, Vol. 721, pp. 255-260, Trans Tech Publications
    Year: 2012
  30. Authors: Sadouirai Fausan, OKA Koichi
    Title: The Frequency Response of Vibration Control with a Linear Actuator and a Permanent Magnet
    Journal: 日本AEM学会誌, Vol. 20, No. 2, pp. 526-531, 養賢堂
    Year: 2012
  31. Authors: SUN FENG, OKA Koichi, JIN Junjie
    Title: Improvement of Zero Suspension Force Performance Using a Special Magnet for a Magnetic Suspension Device
    Journal: Advanced Engineering Forum , Vol. 2-3, pp. 1099-1104, Trans Tech Publications, Switzerland
    Year: 2011
  32. Authors: SUN FENG, OKA Koichi, Akira Tsurumi
    Title: Torque Analysis of a Noncontact Spinning System Using Linearly Actuated Magnets
    Journal: 日本AEM学会誌, Vol. 19, No. 3, pp. 517-520, 日本AEM学会
    Year: 2011
  33. Authors: SUN FENG, JIN Junjie, OKA Koichi
    Title: Characteristics Analysis of Noncontact Spinning Mechanism with Numerical Simulation
    Journal: Advanced Materials Research, Vol. 308-310, pp. 2146-2151, Trans Tech Publications, Switzerland
    Year: 2011
  34. Authors: SUN FENG, JIN Junjie, OKA Koichi
    Title: Noncontact Magnetic Suspension of an Iron Ball Using Flux Path Control Mechanism
    Journal: Advanced Materials Research, Vol. 230-232, pp. 573-577, Trans Tech Publications, Switzerland
    Year: 2011
  35. Authors: Sadouirai Fausan, OKA Koichi, Akiyuki Sano, Yuuta Hirokawa
    Title: Vibration Control With Linear Actuator Permanent Magnet System using LQR Method
    Journal: Journal of System Design and Dynamics, Vol. 5, No. 6, pp. 1238-1250, 日本機械学会
    Year: 2011
  36. Authors: Sun Feng, OKA Koichi
    Title: Feasibility Analysis of Two Iron Balls Simultaneous Suspension Using Flux Path Control Mechanism
    Journal: Journal of System Design and Dynamics, Vol. 5, No. 5, pp. 1155-1166, 日本機械学会
    Year: 2011
  37. Authors: Y.Inoue, T.Liu, K.Shibata, K.Oka, Chunguang LI
    Title: Addional Design Features of a Mater-slave Control System with Force Sensing and Energy Recycling for upper Limb Rehablitation Robots
    Journal: Instrumentation Science & Technology
    Year: 2010
  38. Authors: Koichi Oka, Feng Sun
    Title: Noncontact Spining Mechanism Using Rotary Permanent Magnets
    Journal: 電気学会論文誌D
    Year: 2010
  39. Authors: K. Oka, Sun Feng, Yuuta Saibara
    Title: Magnetic suspension system by flux path control using rotary actuator
    Journal: International Journal of Applied Electromagnetics and Mechanics
    Year: 2010
  40. Authors: C. Li, Y. Inoue, T. Liu, K. Shibata, K. Oka
    Title: Design and Implementation of a Compact Master-Slave Robotic System with Force Feedback and Energy Recycling
    Journal: Journal of System Design and Dynamics, Vol. 2, No. 2, pp. 282-295, Trans. JSME
    Year: 2010
  41. Authors: Chunguang LI, Yoshio INOUE, Tao LIU, Kyoko SHIBATA, Koichi OKA
    Title: Design and Implementation of a Compact Master-Slave Robotic System with Force Feedback and Energy Recycling
    Journal: Journal of System Design and Dynamics, Vol. 4, No. 1, pp. 13-25, JSME
    Year: 2010
  42. Authors: Y. MATSUI, I. KOUNO, T. IWASA, M. MIYANAKA, Y. HIGASHI, Y. KUMAGAI, K. OKA, M. KATAOKA, M. NAGAHARA
    Title: Feasibility study for multipurpose usage of CCTV
    Journal: 14th ITS world congress, CD-ROM
    Year: 2007
  43. Authors: OKA Koichi
    Title: A Miniaturized Levitation System With Motion Control Using a Piezoelectric Actuator
    Journal: IEEE Trans. on Control System Technology, Vol. 10, No. 5, pp. 666-670
    Year: 2002
Keynote lectures
  1. Noncontact Magnetic Suspension System Using Mechanical Control, The 1st Pacific RIM Academic International Conference on Theory and Application of Vibration Mechanics, Shinyang, China, 2019
Grants-in-Aid for Scientific Research from the Japanese government
  1. Project title: Magnetic Suspension System Using Mechanical Control
    Category: Grant-in-Aid for Scientific Research (B)
    Project number: 25289052
    Project period: 2013-2016
    Total budget amount: 18,460,000 yen
    Keywords:

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Social activities

Committee roles
  1. Dynamics & Control, Robotics & Mechatronics, Associate Editor, 2020-2021
  2. Domestic Advisory Board, The 15th International Conference on Motion and Vibration Control(MoViC2020), 2020
  3. International Symposium Committee Member ASCC2019, 2019
  4. International Symposiumu Chair ISEM2019, 2019-
  5. International Symposium Chair LDIA2019, 2019-
  6. International Conference Chair ISMB16, 2018
  7. Session Chair of 5th J-K Symposium on Dynamics and Control, JSME, 2017
  8. Session Chair APISAT 2017, Japan Society for Aeronautical and Space Scienses, 2017
  9. ICMA Program Committee, IEEE, 2017
  10. Publish Chair, International Symposium on Magnetic Bearings, 2016-2017
  11. Program Committee Member, The 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM), The 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM), 2015
  12. Program Committee member IEEE ICMA 2014, IEEE, 2014
  13. 14th International Symposium on Magnetic Bearings, Program Committee, 2014
  14. SICE Annual Conference Chair, 2014

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