Kota Fujimoto

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About Me

Kota Fujimoto's Photo

Kota Fujimoto received the B.E. degree from the Department of Aeronautics and Astronautics in 2021, the M.S. degree from the Department of Advanced Energy in 2023, and the Ph.D. degree from the Department of Electrical Engineering and Information Systems in 2026, all from The University of Tokyo, Tokyo, Japan. He is currently a Project Researcher at KYOTO Design Lab, Center for the Possible Futures, Kyoto Institute of Technology, Kyoto, Japan. His research interests focus mainly on system design, ranging from mission planning to the detailed integration of mechatronics and control systems. His specific topics of interest include in-flight inductive power transfer for UAVs, high-precision control of machine tools, and human-robot interaction on construction sites. Dr. Fujimoto is a Member of the Institute of Electrical and Electronics Engineers (IEEE), the Institute of Electrical Engineers of Japan (IEEJ), the Japan Society for Aeronautical and Space Sciences (JSASS), and the Society of Automotive Engineers of Japan (JSAE).

Project

Doctoral Research: UAV-Oriented Control and System Design for In-flight Inductive Power Transfer Systems

 In my doctoral research, as shown in Fig. 1, I am conducting a study to extend the flight time of drones by applying wireless power transmission using magnetic resonance to drones in flight. As of October 2023, the flight time of battery-powered rotor-type drones is about 40 minutes at most, and it is said that the market price is about 20 minutes. On the other hand, when considering the industrial use of drones for security, inspection, and transportation purposes, this flight time is not sufficient. My research fundamentally solves this problem and realizes a drone with theoretically infinite flight time.
 An example of the social implementation of in-flight charging is shown in Fig. 2. In-flight charging is effective for operations that use a fixed route, and in Fig. 2, the drone is involved in security operations that circulate a fixed route. In this operation, the drone departs from the drone port, monitors the factory while making a round, and finally returns to the drone port and lands and charges. Depending on the size of the site, with the current technology, drones need to charge every round, making it difficult to increase the operation rate of the aircraft. On the other hand, if a power transmission coil for in-flight charging is installed on the drone's surveillance route, it is possible to supply power to the drone that is monitoring. This eliminates the need to stop at the drone port every round, making it possible to improve the operation rate of the aircraft. By improving the operation rate of the aircraft, it is possible to reduce the number of aircraft necessary for the operation, or to operate with a larger number of aircraft.
Drone Tx Coil Image

Fig. 1

Security Mission Image

Fig. 2

Tools

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Achievement

International Journal (Peer-reviewed)

  1. Yifan Xu, Clara Cheung, Ming Shan Ng, Akilu Yunusa Kaltungo, Tsukasa Ishizawa, Kota Fujimoto, "Construction robotics: a systematic review of robot types, applications and human robot collaborations," Results in Engineering, Vol. 30, 110406, 2026, doi: 10.1016/j.rineng.2026.110406.
  2. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, "High Precision Control for Twin-Drive Machine Tool Based on Mode Decoupling with Virtual Viscosity," IEEE/ASME Transactions on Mechatronics, Vol. 30, No. 4, pp. 3054-3062, 2025, doi: 10.1109/TMECH.2025.3567273.
  3. Takuma Katagiri, Kentaro Yokota, Kota Fujimoto, Sakahisa Nagai, Hiroshi Fujimoto, "Wind Tunnel Verification of Velocity Control in Wing Coordinate System Using Acceleration-Based Disturbance Observer for Tilt-Wing eVTOL," IEEJ Journal of Industry Applications, Vol. 14, No. 2,pp. 188-195, 2025, 10.1541/ieejjia.24005235.

International Conference (Peer-reviewed)

  1. Yifan Xu, Clara Cheung, Ming Shan Ng, Akilu Yunusa Kaltungo, Tsukasa Ishizawa, Kota Fujimoto, “Analysing Construction Robotics Safety Standards for Safety Modelling and Simulation,” in International Symposium on Automation and Robotics in Construction (ISARC), 2026. (accepted)
  2. Ami Kumaki, Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Masataka Sakamoto, Yuki Terada, “Jerk-Timing-Based Polynomial Trajectory Optimization for Vibration Suppression,” in IEEE 19th International Conference on Advanced Motion Control (AMC), Daegu, South Korea, 2026.
  3. Yusei Fujishima, Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Masataka Sakamoto, Yuki Terada, “Modeling and Analysis of Coupled System for Circular Motion in Machine Tools with XY-Axis Stage,” in IEEE 19th International Conference on Advanced Motion Control (AMC), Daegu, South Korea, 2026.
  4. Yuki Tanaka, Kota Fujimoto, Sakahisa Nagai, Hiroshi Fujimoto, “Altitude Optimization above Transmitter Coil for In-flight Inductive Power Transfer Using Dynamic Programming,” in IEEE 19th International Conference on Advanced Motion Control (AMC), Daegu, South Korea, 2026.
  5. Mayuko Hirota, Manto Kamiya, Yuto Naoki, Kota Fujimoto, Kentaro Yokota, Binh-Minh Nguyen, Sakahisa Nagai, Osamu Shimizu, Hiroshi Fujimoto, “Inertia Estimation About z-Axis Using Motor Torque for Multi-Rotors,” in The 12nd IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON), Daegu, Korea, 2026.
  6. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, “Practical Implementation of High Precision Control Based on Mode Decoupling with Virtual Viscosity for Parallel Twin- Drive Machine Tool System,” in The 12nd IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON), Daegu, Korea, 2026.
  7. Shikauchi Yutaka, Kota Fujimoto, Osamu Shimizu, Hiroshi Fujimoto, Shuji Kawano, "Verification of Big Data Analysis on Wireless Power Transfer For Electric Vehicles Focused on Traffic Signal GPS," in 7th International Electric Vehicle Technology Conference 2025 (EVTeC), Yokohama, Japan, 2025.
  8. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, "High Precision Control for Parallel Twin-Drive Machine Tool System Based on Offline Parameter Identification Focusing on Differential Mode," in The 11st IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON), Shimane, Japan, 2025.
  9. Takuma Katagiri, Kota Fujimoto, Sakahisa Nagai, Hiroshi Fujimoto, "Trajectory Tracking Control of Tilt-Wing eVTOL Using Aerodynamic Coupling Observer and Wing Angle Correction Method", in The 2025 IEEE International Conference on Mechatronics (ICM), Wollongong, Australia, 2025
  10. Pinzhe Feng, Yuto Naoki, Kota Fujimoto, Kentaro Yokota, Sakahisa Nagai, Hiroshi Fujimoto "Basic Study on Short Distance Landing Control with Reverse Thrust of Variable Pitch Propeller for Fixed Wing Electric Aircraft," in The 2025 IEEE International Conference on Mechatronics (ICM), Wollongong, Australia, 2025
  11. Kota Fujimoto, Osamu Shimizu, Hiroshi Fujimoto, Jin Katsuya, Tetsu Sato, "Feasibility Study for Dynamic Wireless Power Transfer in Simulation with Big Data Focusing on Battery Capacity Requirement of Electric Vehicles," in the 27th edition of the International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), Ischia, Italy, 2024.
  12. Sakahisa Nagai, Yusuke Satoh, Kota Fujimoto, Hiroshi Fujimoto, "Sensorless Drone Detection for In-Flight Inductive Power Transfer Using Transmitter-Side Voltage Pulses," in IEEE 2024 Wireless Power Technology Conference and Expo (WPTCE), Kyoto, Japan, 2024, doi: 0.1109/WPTCE59894.2024.10557296.
  13. Takuma Katagiri, Kentaro Yokota, Kota Fujimoto, Sakahisa Nagai, Hiroshi Fujimoto, "Basic Study on Velocity Control in Wing Coordinate System Using Acceleration-based Disturbance Observer for Tilt-wing eVTOL," in The 10th IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON), Kyoto, Japan, 2024.
  14. Shogo Yamada, Kota Fujimoto, Hiroshi Fujimoto, "Basic Study on Robust Perfect Tracking Control Based on Parameter Estimation Reducing Outlier Effects," in The 10th IEEJ international workshop on Sensing, Actuation, Motion Control, and Optimization (SAMCON), Kyoto, Japan, 2024.
  15. Kota Fujimoto, Hiroshi Fujimoto, Alessandro Correa Victorino, Pedro Castillo, "Optimal Energy Trajectory Generation Based on Pitch-Dependent Mutual Inductance Model for In-Flight Inductive Power Transfer of Drones," in IEEE 18th International Conference on Advanced Motion Control (AMC), Kyoto, Japan, 2024, doi: 0.1109/AMC58169.2024.10505445.
  16. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, "High Precision Control for Twin-Drive System Based on Mode Decoupling with Virtual Viscosity: Equivalent Controller Transform for Machine Tool," in IEEE 18th International Conference on Advanced Motion Control (AMC), Kyoto, Japan, 2024, doi: 0.1109/AMC58169.2024.10505638.
  17. Kota Fujimoto, Sakahisa Nagai, Binh-Minh Nguyen, Hiroshi Fujimoto, "Test Bench Study on Attitude Estimation in Ground Effect Region Based on Motor Current for In-Flight Inductive Power Transfer of Drones," in IEEE 2023 The 49th Annual Conference of the IEEE Industrial Electronics Society (IECON), Singapore, 2023, doi: 0.1109/IECON51785.2023.10312055. [arXiv]
  18. Yusuke Satoh, Kota Fujimoto, Ryo Matsumoto, Sakahisa Nagai, Binh-Minh Nguyen, Hiroshi Fujimoto, "Basic Study on Received Power Control of In-Flight Inductive Power Transfer for Drones by Active Rectifier Switching and Altitude Regulation," in IEEE 2023 The 49th Annual Conference of the IEEE Industrial Electronics Society (IECON), Singapore, 2023, doi: 10.1109/IECON51785.2023.10312000.
  19. Kota Fujimoto, Takumi Hamada and Hiroshi Fujimoto, "Proposal on Model Based Current Overshoot Suppression of Receiver Side Coil in Drone Wireless Power Transfer System," in IEEE 2022 Wireless Power Week (WPW), pp. 235-239, Bordeaux, France, 2022, doi: 10.1109/WPW54272.2022.9854039. [arXiv]

Domestic Conference (Not-reviewed)

  1. Ten Arai, Maho Matsukura, Daigo Takasaki, Isamu Moriai, Kenshin Yamakawa, Keisuke Yorita, Kota Fujimoto, Hiroyuki Koizumi, Kimiya Komurasaki, "Reduction of Electromagnetic Disturbances in a Wireless Power Transfer System Used in Thrust Stands for Micro Propulsion Systems," in The 65th Conference on Aerospace Propulsion and Power
    2. , Oita, Japan, 2025.
  2. Mayuko Hirota, Manto Kamiya, Yuto Naoki, Kota Fujimoto, Binh-Minh Nguyen, Sakahisa Nagai, Osamu Shimizu, Hiroshi Fujimoto, Kentaro Yokota, "Basic Study on Z-axis Inertia Estimation Method Using Counter-torque Observer in Multi-rotors," in IEE-Japan Technical Meeting on Mechatronics Control (PSS), No. MEC-25-007, Tokyo, Japan, 2025.
  3. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, "High Precision Control for Twin-Drive System of Machine Tool Based on Mode Decoupling with Virtual Viscosity: Feedforward Realization of Virtual Viscosity on Two-Inertia System," in IEE-Japan Technical Meeting on Mechatronics Control (PSS), No. MEC-24-012, Tokyo, Japan, 2024
  4. Kota Fujimoto , Sakahisa Nagai, Binh-Minh Nguyen, Hiroshi Fujimoto,"Motor Current Based Attitude Estimation Considering Ground Effect for In-flight Inductive Power Transfer of Drones: Basic Concept and Test-Bench Evaluation," in IEE-Japan 2024 Industry Applications Society Conference (JIASC), No. 1-60, Ibaraki, Japan, 2024.
  5. Kota Fujimoto, Yusuke Satoh, Sakahisa Nagai, Hiroshi Fujimoto, "Basic Study on Receiving-Side System Design of In-flight Inductive Power Transfer for Drones Considering Weight Limitation," in IEE-Japan Joint Technical Meeting on Power Engineering/Power Systems Engineering/Semiconductor Power Converter (SPC), No. PE-24-059,PSE-24-071,SPC-24-113, Nagasaki, Japan, 2024.
  6. Kota Fujimoto, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada, "High Precision Control for Twin-Drive System of Machine Tool Based on Mode Decoupling with Virtual Viscosity: Basic Study on Two-Inertia System," in IEE-Japan Technical Meeting on Mechatronics Control (PSS), No. MEC-23-011, Tokyo, Japan, 2023
  7. Yusuke Satoh, Kota Fujimoto, Ryo Matsumoto, Sakahisa Nagai, Binh-Minh Nguyen, Hiroshi Fujimoto, "Basic Study on Flight Altitude and Battery Current Control in In-Flight Wireless Power Transfer for Drones," in IEE-Japan Joint Technical Meeting on Power Engineering/Power Systems Engineering/Semiconductor Power Converter (SPC), No. SPC23141 , Okinawa, Japan, 2023.
  8. Kota Fujimoto, Osamu Shimizu, Hiroshi Fujimoto, Jin Katsuya, Tetsu Sato, "Requirement Analysis for Dynamic Wireless Power Transfer with Big Data from Real Vehicles," in IEE-Japan Joint Technical Meeting on Power Engineering/Power Systems Engineering/Semiconductor Power Converter (SPC), No. PE-23-084,PSE-23-090,SPC-23-140, Okinawa, Japan, 2023.
  9. Kota Fujimoto , Kentaro Yokota, Sakahisa Nagai, Hiroshi Fujimoto,"Modeling and Verification of Pitch-Dependent Coupling Coefficient for WPT to Flying Drone," in IEE-Japan 2021 Industry Applications Society Conference (JIASC), No. 48 ,Niigata, Japan, 2021.

Award

  1. 2025 IEEJ Industry Applications Society Excellent Presentation Award, The Institute of Electrical Engineers of Japan
  2. APET Excellent Poster Presentation Award 3rd Prize, Alliance for Advanced Power & Environmental Technology
  3. 2021 IEEJ Excellent Presentation Award, The Institute of Electrical Engineers of Japan

Fellowship

  1. Fostering Advanced Human Resources to Lead Green Transformation (SPRING GX), From April 2023

Grant

  1. The Dispatch for International Meetings Program 2024, Fostering Advanced Human Resources to Lead Green Transformation (SPRING GX)
  2. La Bourse de Mobilité Internationale de Sorbonne Universités 2022/2023, Sorbonne Université
  3. The Telecommunications Advancement Foundation Overseas Travel Expense Assistance August 2023, The Telecommunications Advancement Foundation
  4. Suzuki Foundation Researcher Overseas Training Grant 2022, Suzuki Foundation

Contact

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