Details of the Researcher

PHOTO

Yushin Hara
Section
Graduate School of Engineering
Job title
Assistant Professor
Degree

  • 博士（工学）（東北大学）

  • 修士（工学）（東北大学）

e-Rad No.
00979049

Research History 3

  • 2023/10 - Present
    Tohoku University　Graduate School of Engineering Department of Aerospace Engineering　Assistant Professor

  • 2023/04 - 2023/09
    University of Tsukuba　Faculty of Engineering, Information and Systems

  • 2020/04 - 2022/09
    日本学術振興会 特別研究員DC2

Education 3

  • 東北大学 大学院工学研究科 航空宇宙工学専攻 博士課程

    2019/04 - 2023/03

  • 東北大学 大学院 工学研究科 航空宇宙工学専攻 修士課程

    2017/04 - 2019/03

  • 東北大学 工学部 機械知能・航空工学科

    2013/04 - 2017/03

Professional Memberships 3

  • The International Society for Optical Engineering

    2022/12 - Present

  • 日本航空宇宙学会

    2021/06 - Present

  • 日本機械学会

    2017/06 - Present

Research Interests 4

  • System identification

  • 振動発電

  • エネルギ回生

  • 柔軟宇宙構造物の振動制御・振動抑制

Research Areas 1

  • Aerospace, marine, and maritime Engineering / Aerospace engineering /

Awards 2

  1. 部門一般表彰「オーディエンス表彰」（D&D2023）

    2024/09　日本機械学会

  2. 若手奨励賞

    2021/08　日本航空宇宙学会 第63回構造強度に関する講演会　ファジィ適応制御を用いた間欠スイッチングハーベスタ

Papers 24

  1. Shape Keepers of Hollow Cylindrical Electrodynamic Tethers for Space Debris Removal

    Yushin Hara, Ryo Kuzuno, Hikaru Takahashi, Yoshihiro Sugiyama, Yuki Kikuji, Kiyonobu Ohtani, Sunao Hasegawa, Kanjuro Makihara

    Journal of Spacecraft and Rockets　2025/07

    DOI： 10.2514/1.A36222 　

  2. Model predictive control for optimized piezoelectric energy harvesting under multimodal vibration excitation: theory and simulation

    Meng Zhou, Yushin Hara, Kanjuro Makihara

    Engineering Research Express　2025/06/30

    DOI： 10.1088/2631-8695/add083 　

  3. Switch control strategy adapted to multimodal vibration and circuit with fewer diodes for magnetostrictive energy harvesting

    Yuusuke Kobayashi, An Li, Suhaib Bin Solehuddin, Kota Koyano, Yushin Hara, Kanjuro Makihara

    Smart Materials and Structures　2025/06/01

    DOI： 10.1088/1361-665X/ade4ea 　

  4. Partial heat curing enhancing space debris shielding performance in multi-layered inflatable structures

    Hikaru Takahashi, Yoshihiro Sugiyama, Ryo Kuzuno, Sunao Hasegawa, Kiyonobu Ohtani, Yushin Hara, Kanjuro Makihara

    Journal of Space Safety Engineering　2025/06

    DOI： 10.1016/j.jsse.2025.04.002 　

  5. High-fidelity analysis and experiments of a wireless sensor node with a built-in supercapacitor powered by piezoelectric vibration energy harvesting Peer-reviewed

    Takaharu Yamada, Haruhiko Asanuma, Yushin Hara, Alper Erturk

    Mechanical Systems and Signal Processing　224　112147　2025/02

    DOI： 10.1016/j.ymssp.2024.112147 　

  6. Statistically Oriented Optimal Control and Disturbance Prediction for Piezoelectric Semi-Active Vibration Suppression Peer-reviewed

    Mizuki Abe, Koyo Mishima, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    IEEE Transactions on Control Systems Technology　in press　2025/01

    DOI： 10.1109/TCST.2024.3463333 　

  7. Magnetostrictive Vibration Suppression via Integration of Current Amplification Negative Capacitor and Current Inversion Semi-Active Control Circuit Peer-reviewed

    An Li, Yuusuke Kobayashi, Yushin Hara, Kanjuro Makihara

    Journal of Intelligent Material Systems and Structures　36　(1)　53-73　2024/11/30

    Publisher: SAGE Publications

    DOI： 10.1177/1045389x241291217 　

    ISSN： 1045-389X

    eISSN： 1530-8138

    More details Close

    When attempting to suppress structural vibrations employing a magnetostrictive transducer, owing to the control force is generated from current, a larger amplification of the current entails superior control performance. The semi-active control theory uses the synchronized switching damping (SSD) technique for structural vibration suppression while requiring a minimal energy supply. However, the absence of external energy input limits the current amplification performance. To address this limitation, this study proposes a novel method that combines semi-active vibration suppression method with negative capacitance to improve the current amplification performance. The proposed circuit switches the circuit status between shunt, inductor-capacitor (LC) electrical oscillation, and negative capacitance circuits. A mathematical model was employed to analyze the current operation, suppression performance, and robustness of the proposed circuit. Further, machine learning and kernel regression model were employed to predict the optimal control force gain. Validation experiments conducted on a 10-bay truss structure identical to the simulation model show that the experimental results align with the simulation predictions. The vibration suppression rates of the proposed method under single-mode and multiple-mode vibrations reached 85.8% and 78.3%, respectively, which are 2.64 and 1.89 times higher than those achieved by conventional methods.

  8. Piezoelectric flutter energy harvesting: absolute nodal coordinate formulation model and wind tunnel experiment Peer-reviewed

    Taisei Mukogawa, Kento Shimura, Shuonan Dong, Koji Fujita, Hiroki Nagai, Masaki Kameyama, Yu Shi, Yu Jia, Constantinos Soutis, Hiroki Kurita, Fumio Narita, Yushin Hara, Kanjuro Makihara, Keisuke Otsuka

    Mechanics Research Communications　104351-104351　2024/11

    Publisher: Elsevier BV

    DOI： 10.1016/j.mechrescom.2024.104351 　

    ISSN： 0093-6413

  9. State observer of multibody systems formulated using differential algebraic equations International-journal

    Taiki Okada, Shuonan Dong, Ryo Kuzuno, Yuya Takahashi, Yoshitaka Shizuno, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Multibody System Dynamics　2024/06/06

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s11044-024-09995-z 　

    ISSN： 1384-5640

    eISSN： 1573-272X

    More details Close

    Abstract Multibody dynamics comprises methodologies for the design and analysis of mechanical systems, with Kalman filters being the principal state estimation methods. The Kalman filters are generally formulated for unconstrained systems, the dynamics of which are described by ordinary differential equations in state-space models. However, multibody systems are constrained systems, and the commonly used method to describe their dynamics involves using differential algebraic equations (DAEs) comprising differential and algebraic equations. The differential equations also include the Lagrange multipliers. Hence, incorporating multibody systems, described by DAEs into the scheme of Kalman filters, cannot be achieved straightforwardly, which facilitates different strategies being addressed. This study develops a novel method for converting DAEs into a state-space model. A transition model of the time derivatives of Lagrange multipliers and a Lagrange multiplier constraint vector are devised and used in the state and output equations, respectively. The continuous- and discrete-time extended Kalman filters (CEKF and DEKF) are constructed using the proposed state-space model, and state estimations are simulated on the benchmark planar four- and five-bar linkages. Further, a demonstration of system observability is conducted, and sensitivity to the initial state estimates is studied. These tests demonstrate that the proposed state-space model achieves observable systems and that both the CEKF and DEKF, constructed using the proposed state-space model, can estimate the states with a wide range of initial conditions.

  10. Comparison of Magnetostrictive-Actuated Semi-Active Control Methods Based on Synchronized Switching

    An Li, Yuusuke Kobayashi, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Actuators　13　(4)　143-143　2024/04/12

    Publisher: MDPI AG

    DOI： 10.3390/act13040143 　

    eISSN： 2076-0825

    More details Close

    Three distinct synchronized switching circuits based on a magnetostrictive actuator are compared in this paper to examine their control mechanisms and circuit characteristics. These circuits include a semi-active shunt circuit, a semi-active current inversion and amplification circuit, and a semi-active automatic current inversion and amplification circuit. Each circuit type employs an additional electronic switch. The synchronized switching method enables the rational control of the circuit current generated by the magnetostrictive actuator to fulfill any desired control strategy. Simulation and experimental results on a 10-bay truss structure reveal that the three circuits can effectively adjust the polarity of the induced current as needed. The three circuits are then compared to thoroughly analyze their unique characteristics and explain their respective advantages and dis-advantages. Using the comparison results, various options available for control circuit design are demonstrated.

  11. System Identification of Multi-Degree-of-Freedom Structures Subject to Unmeasurable Periodic Disturbances Using a Piezoelectric Device Peer-reviewed

    Tianyi TANG, Yushin HARA, Meng ZHOU, Keisuke OTSUKA, Kanjuro MAKIHARA

    Journal of Evolving Space Activities　2　158　2024

    DOI： 10.57350/jesa.158 　

  12. Semi-Active Structural Excitation Method to Realize Energy-Saving On-Orbit Identification Peer-reviewed

    Yushin HARA, Tianyi TANG, Keisuke OTSUKA, Kanjuro MAKIHARA

    Journal of Evolving Space Activities　2　2024

    DOI： 10.57350/jesa.125 　

  13. Magnetostrictive-based induced current inversion and amplification: Semi-active vibration suppression for multiple-degree-of-freedom flexible structures International-journal International-coauthorship Peer-reviewed

    An Li, Yuusuke Kobayashi, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Journal of Sound and Vibration　568　118069-118069　2024/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.jsv.2023.118069 　

    ISSN： 0022-460X

  14. Energy harvesting using a magnetostrictive transducer based on switching control Peer-reviewed

    An Li, Keiju Goto, Yuusuke Kobayashi, Yushin Hara, Yu Jia, Yu Shi, Constantinos Soutis, Hiroki Kurita, Fumio Narita, Keisuke Otsuka, Kanjuro Makihara

    Sensors and Actuators A: Physical　355　114303-114303　2023/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.sna.2023.114303 　

    ISSN： 0924-4247

  15. Low-energy-consumption structural identification with switching piezoelectric semi-active input Peer-reviewed

    Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Mechanical Systems and Signal Processing　187　2023/03/15

    DOI： 10.1016/j.ymssp.2022.109914 　

    ISSN： 0888-3270

    eISSN： 1096-1216

  16. Strategy for performance improvement in piezoelectric semi-active structural system identification by excluding switching failures using pseudo-state feedback Peer-reviewed

    Yushin Hara, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Mechanical Systems and Signal Processing　187　2023/03/15

    DOI： 10.1016/j.ymssp.2022.109906 　

    ISSN： 0888-3270

    eISSN： 1096-1216

  17. Semi-active switching vibration control with tree-based prediction and optimization strategy Peer-reviewed

    Mizuki Abe, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Journal of Intelligent Material Systems and Structures　34　(4)　440-460　2023/03

    DOI： 10.1177/1045389X221109253 　

    ISSN： 1045-389X

    eISSN： 1530-8138

  18. Self-sensing method for semi-active structural identification by removing piecewise bias from piezoelectric voltage Peer-reviewed

    Yushin Hara, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Sensors and Actuators A: Physical　347　2022/11/01

    DOI： 10.1016/j.sna.2022.113907 　

    ISSN： 0924-4247

  19. Comprehensive predictive control for vibration suppression based on piecewise constant input formulation Peer-reviewed

    Ikuya Takamoto, Mizuki Abe, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Journal of Intelligent Material Systems and Structures　33　(7)　901-917　2022/04

    DOI： 10.1177/1045389X211038703 　

    ISSN： 1045-389X

    eISSN： 1530-8138

  20. Adaptive and robust operation with active fuzzy harvester under nonstationary and random disturbance conditions Peer-reviewed

    Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Sensors　21　(11)　2021/06/01

    DOI： 10.3390/s21113913 　

    ISSN： 1424-8220

  21. Piezoelectric energy enhancement strategy for active fuzzy harvester with time-varying and intermittent switching Peer-reviewed

    Yushin Hara, Meng Zhou, An Li, Keisuke Otsuka, Kanjuro Makihara

    Smart Materials and Structures　30　(1)　2021/01

    DOI： 10.1088/1361-665X/abca08 　

    ISSN： 0964-1726

    eISSN： 1361-665X

  22. Self-sensing state estimation of switch-controlled energy harvesters Peer-reviewed

    Yushin Hara, Yuta Yamamoto, Kanjuro Makihara

    Journal of Intelligent Material Systems and Structures　31　(20)　2326-2341　2020/12/01

    DOI： 10.1177/1045389X20943944 　

    ISSN： 1045-389X

    eISSN： 1530-8138

  23. Predictive Switching Vibration Control Based on Harmonic Input Formulation International-journal Peer-reviewed

    Takamoto, I, Abe, M, Hara, Y, Nakahara, T, Otsuka, K, Makihara, K

    Sensors & Actuators: A. Physical　315　112271　2020/08

    DOI： 10.1016/j.sna.2020.112271 　

    ISSN： 0924-4247

  24. Compact, Digital and Self-Powered Piezoelectric Vibration Energy Harvester with Generation Control using Voltage Measurement Circuit Peer-reviewed

    Yushin Hara, Kensuke Saito, Kanjuro Makihara

    Sensors & Actuators: A. Physical　299　Article No. 111609　2019/09

    DOI： 10.1016/j.sna.2019.111609 　

    ISSN： 0924-4247

Show all ︎Show first 5

Presentations 50

  1. Sensor-Less and Energy-Efficient Structural Health Monitoring for Piezoelectric Smart Space Structure International-presentation

    Yushin HARA, Tianyi TANG, Xingzhi LI, Hajime SAITO, Kanjuro MAKIHARA

    35th International Symposium on Space Technology and Science　2025/07/17

  2. Highly efficient Vibration Energy Harvesting in Space using Magnetostrictive Materials

    Yusuke KOBAYASHI, Suhaib SOLEHUDDIN, Yushin HARA, Kanjuro MAKIHARA

    35th International Symposium on Space Technology and Science　2025/07/17

  3. Investigation on nonlinearity of a vibrating flexible beam with piezoelectric film International-presentation International-coauthorship

    Kento SHIMURA, Mizuki ISHIGAMI, Yu SHI, Yu JIA, Constantinous SOUTIS, Zhenjin WANG, Fumio NARITA, Yushin HARA, Kanjuro MAKIHARA, Keisuke OTSUKA

    35th International Symposium on Space Technology and Science　2025/07/17

  4. Identification of Structural Dynamics Under Periodic Disturbance with a Semi-Active Vibration Control Device

    Tianyi TANG, Kensuke SUZUKI, Kotaro YAMAO, Taiko MORIKAWA, Hajime SAITO, Xingzhi LI, Meng ZHOU, Yushin HARA, Kanjuro MAKIHARA

    The 8th Korea-Japan Joint Symposium on Dynamics & Control　2025/04/22

  5. Phase-Shift Switching Strategy for Piezoelectric Vibration Energy Harvesting

    Meng ZHOU, Xingzhi LI, Hajime SAITO, Taiko MORIKAWA, Kotaro YAMAO, Kensuke SUZUKI, Tianyi TANG, Yushin HARA, Kanjuro MAKIHARA

    The 8th Korea-Japan Joint Symposium on Dynamics & Control　2025/04/23

  6. 柔軟構造物における磁歪素子を活用した振動エネルギ変換と活用

    SOLEHUDDIN SUHAIB, 小林佑輔, 李安, 原勇心, 槙原幹十朗

    日本機械学会東北支部第60期総会・講演会　2025/03/17

  7. 未知外乱の推定結果を用いた宇宙構造物の振動制御

    森川大広, 周蒙, 唐天乙, 三島光翼, 李星志 齊藤創, 山尾孝太郎, 原勇心, 槙原幹十朗

    日本機械学会東北支部第60期総会・講演会　2025/03/17

  8. 構造物の逐次部分空間同定に関する研究

    齊藤創, 周蒙, 唐天乙, 三島光翼, 李星志, 森川大広, 山尾孝太郎, 原勇心, 槙原幹十朗

    日本機械学会東北支部第60期総会・講演会　2025/03/17

  9. 機械学習を用いた熱問題の解析

    加藤諒, 奥山敦人, 江口空希, 原勇心, 大塚啓介, 槙原幹十朗

    日本機械学会東北支部第60期総会・講演会　2025/03/17

  10. Sensor-Less Structural Health Monitoring using Semi-Active Controlled Piezoelectric Transducer

    Yushin HARA, Tianyi TANG, Kanjuro MAKIHARA

    ELyT workshop 2025　2025/02/21

  11. 機械学習を用いたデブリクラウド輪郭検出と統計 的手法によるクラウド速度の推定

    杉山喜洋, 高橋輝, 菊次祐紀, 原勇心, 槙原幹十朗

    日本機械学会東北支部第60期秋季講演会　2024/09/28

  12. 球状テンセグリティの形状決定における構造変数 の従属性および初期自己応力導出

    松本佑太, 鈴木大貴, 原勇心, 大塚啓介, 槙原幹十朗

    日本機械学会東北支部第60期秋季講演会　2024/09/28

  13. Semi-Active Vibration Suppression of Multiple-Degree-of-Freedom Flexible Structures Using Magnetostrictive Transducers

    Li AN, Yusuke KOBAYASHI, Yushin HARA, Kanjuro MAKIHARA

    17th International Conference on Motion and Vibration (MoViC2024)　2024/08/05

  14. 宇宙構造の圧電セミアクティブ同定のための無相関化制御

    原勇心, 唐天乙, 槙原幹十朗

    第66回構造強度に関する講演会　2024/08/02

  15. Structural Damage Detection with a Limited Number of Sensors using Subspace Identification International-presentation

    Tianyi TANG, Meng ZHOU, Yushin HARA, Kanjuro MAKIHARA

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2024　2024/06/26

  16. Efficient Vibration Energy Harvesting Method Using Magnetostrictive Materials International-presentation

    Yuusuke KOBATASHI, Suhaib SOLEHUDDIN, An LI, Yushin HARA, Kanjuro MAKIHARA

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2024　2024/06/25

  17. Development and Application of Self-Powered and Digital Controlled Piezoelectric Vibration Energy Harvester International-presentation

    Yushin HARA, Meng ZHOU, Tianyi TANG, Kanjuro MAKIHARA

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2024　2024/06/25

  18. Enhancement Piezoelectric Energy Harvesting by Intermittent and Adaptive Switching Methods International-presentation

    Meng ZHOU, Tianyi TANG, Yushin HARA, Kanjuro MAKIHARA

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2024　2024/06/25

  19. Wireless sensor node powered by piezoelectric vibration energy harvester for vibrational mode identification and structural health monitoring International-presentation

    Takaharu YAMADA, Haruhiko ASANUMA, Yushin HARA

    SPIE Smart Structures + Nondestructive Evaluation 2024　2024/03/25

  20. バフェッティングによる振動エネルギハーベスティング

    志村 賢人, 向川 大成, 原 勇心, 大塚 啓介, 槙原 幹十朗

    日本機械学会東北部第59期総会・講演会　2024/03/15

  21. 不確実さを考慮した圧電振動構造物のモデリング

    李 星志, 三島 光翼, 唐 天乙, 周 蒙, 原 勇心, 槙原 幹十朗

    日本機械学会東北支部第59期総会・講演会　2024/03/15

  22. 3次元トラス構造の単⼀モード振動制御におけるセンサ・アクチュエータ配置の影響

    百田 旬甫, ⻲山 正樹, 原 勇心, 槙原 幹十朗

    北陸信越支部 2024年合同講演会(総会・講演会＆卒業研究発表講演会)　2024/03/08

  23. 居住型インフレータブル構造物におけるスペースデブリ衝突による宇宙環境への影響評価指標

    森本 大介, 高橋 輝, 杉山 喜洋, 菊次 祐紀, 原 勇心, 槙原 幹十朗

    令和５年度宇宙科学に関する室内実験シンポジウム　2024/02/19

  24. 運用中の宇宙構造物の動的特性取得を想定した圧電準能動制御

    原勇心, 唐天乙, 槙原幹十朗

    第38回 宇宙構造・材料シンポジウム　2023/12/18

  25. Structural Identification with Unknown Periodic Disturbance Using Piezoelectric Harvesting Device

    Tianyi Tang, Meng Zhou, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2023　2023/11/01

  26. Analysis of Piezoelectric Energy Harvesting System with Adjustment Charge Inversion and Charge Extraction Switching Techniques

    Meng Zhou, Yushin Hara, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2023　2023/10/31

  27. Advanced Vibration Harvesting Method to Extract More Electricity Using Quasi-Resonance and Energy Regeneration

    Yushin Hara, Meng Zhou, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting Seminar 2023　2023/11/01

  28. Energy Saving Structural Health Monitoring Using Semi-Active Identification International-presentation

    Yushin Hara, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Asia Pacific Conference of the Prognostics and Health Management Society 2023　2023/09/12

  29. Switching Control Methods for Efficient Energy Harvesting of Large scale Vibration Structure Using Magnetostrictive Transducer

    An Li, Yusuke Kobayashi, Yushin Hara, Keisuke Otsuka, Kanjuro Makihara

    Dynamics and Design Conference 2023　2023/08/31

  30. Energy-saving modal parameter identification using semi-passive control

    Yushin Hara, Tianyi Tang, Keisuke Otsuka, Kanjuro Makihara

    Dynamics and Design Conference 2023　2023/08/30

  31. System Identification of Space Structures Subjected to Unknown Disturbances Using Piezoelectric Device International-presentation

    Tianyi Tang, Yushin Hara, Meng Zhou, Mizuki Abe, Keisuke Otsuka, Kanjuro Makihara

    The 34th International Symposium on Space Technology and Science　2023/06/07

  32. Phase-Delay Switching Strategy for Piezoelectric Vibration Energy Harvesting International-presentation International-coauthorship

    Meng Zhou, Yushin Hara, Tianyi Tang, Yu Jia, Yu Shi, Constantinos Soutis, Hiroki Kurita, Fumio Narita, Keisuke Otsuka, Kanjuro Makihara

    The 34th International Symposium on Space Technology and Science　2023/06/06

  33. Piezoelectric Semi-Active Structural Identification Method to Realize Energy-Saving On-Orbit Identification International-presentation

    The 34th International Symposium on Space Technology and Science　2023/06/06

  34. Acceleration-waveform-sending wireless sensor node powered by piezoelectric vibration energy harvester International-presentation International-coauthorship

    Takaharu Yamada, Haruhiko Asanuma, Yushin Hara, Alper Erturk

    SPIE Smart Structures + Nondestructive Evaluation 2023　2023/03/15

  35. Structural modal parameter identification incorporating with semi-active piezoelectric control International-presentation

    Yushin Hara, Haruhiko Asanuma, Keisuke Otsuka, Kanjuro Makihara

    SPIE Smart Structures + Nondestructive Evaluation 2023　2023/03/15

  36. 圧電セミアクティブ入力を用いた省エネルギ振動構造同定

    原 勇心, 唐 天乙, 周 蒙, 大塚 啓介, 槙原 幹十朗

    第64回構造強度に関する講演会　2022/08/03

  37. 柔軟宇宙構造物における磁歪トランスデューサを用いたセミアクティブ振動発電

    後藤 慧樹, 李 安, 渡辺 大志, 原 勇心, 大塚 啓介, 槙原 幹十朗

    日本機械学会東北支部第57期総会講演会　2022/03/11

  38. 圧電素子を用いたセミアクティブ手法による構造システム同定

    唐 天乙, 周 蒙, 原 勇心, 大塚 啓介, 槙原 幹十朗

    日本機械学会東北支部第57期総会講演会　2022/03/11

  39. ファジィ適応制御を用いた間欠スイッチングハーベスティング

    原 勇心, 周 蒙, 大塚 啓介, 槙原 幹十朗

    第63回構造強度に関する講演会　2021/08/04

  40. 磁歪素子を用いた動吸振器による柔軟宇宙構造物の振動制御

    渡辺 大志, 李 安, 原 勇心, 大塚 啓介, 槙原 幹十朗

    日本機械学会東北支部第56期総会講演会　2021/03/12

  41. SICE回路を用いた振動エネルギハーベスティングのロバストな制御則の提案

    周 蒙, 原 勇心, 高本 育弥, 大塚 啓介, 槙原 幹十朗

    日本機械学会東北支部第56期総会講演会　2021/03/12

  42. 回転対称性を利用した球状テンセグリティのモデリング手法の確立

    森瑛 梨奈, 原 勇心, 大塚 啓介, 槙原 幹十朗

    東北支部第56期秋季講演会　2020/09/26

  43. Robustness evaluation of structural vibration estimation by self-sensing stand-alone harvester International-presentation

    Yushin Hara, Kensuke Saito, Ikuya Takamoto, An Li, Kanjuro Makihara

    15th International Conference on Motion and Vibration Control　2020/09/09

  44. Intellectual power generation by stand-alone active harvester with digital control unit International-presentation

    Yushin Hara, Erina Mori, An Li, Kanjuro Makihara

    15th International Conference on Motion and Vibration Control　2020/09/09

  45. Vibration suppression integrating semi-active control and model predictive control based on harmonic input

    Ikuya Takamoto, Mizuki Abe, Yushin Hara, Takeshi Nakahara, Kanjuro Makihara

    15th International Conference on Motion and Vibration Control　2020/09/09

  46. 未知外乱を受けるセミアクティブ制御系の宇宙構造物を対象とするシステム同定

    齋藤 健祐, 原 勇心, 槙原 幹十朗

    Dynamics and Design Conference 2019　2019/08/27

  47. ファジィ制御を用いた高効率圧電振動発電のための適応スイッチ制御則

    原 勇心, 齋藤 健祐, 槙原 幹十朗

    Dynamics and Design Conference 2018　2018/08/29

  48. セルフパワード・ディジタル制御器を組み込んだ圧電振動発電装置の評価

    原 勇心, 齋藤 健祐, 山本 雄大, 槙原 幹十朗

    IIP2018情報・知能・精密機器部門講演会　2018/03/14

  49. ディジタル波形処理を用いたセルフセンシング振動発電

    原 勇心, 山本 雄大, 槙原 幹十朗

    第60回自動制御連合講演会　2017/11/11

  50. 差動計測法を用いたセルフセンシングSSHIエネルギハーベスティング

    原 勇心, 山本 雄大, 齋藤 健祐, 槙原 幹十朗

    東北支部第53期秋季講演会　2017/09/30

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Research Projects 8

  1. Combining Machine Learning and Probabilistic Predictive Vibration Control to Achieve Broadband High Accuracy Vibration Control of an Observation Satellite Extension Truss

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2025/04/01 - 2029/03/31

  2. Fundamental research on multifunctional structure that enables vibration attenuation and structural diagnosis with no power supply

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Kanazawa University

    2023/04/01 - 2026/03/31

  3. 電流符号制御による有効電力の増加を用いた電磁トランスデューサ型振動発電の高効率化

    Offer Organization: パワーアカデミー

    System: 研究助成 「萌芽研究」

    2024/04 - 2025/03

  4. セミアクティブ制御を用いた圧電素子による自己給電構造物損傷検出法の開発

    Offer Organization: 公益財団法人 島津科学技術振興財団

    System: 研究開発助成

    2024/04 - 2025/03

  5. 振動抑制と構造診断を可能にする新規機能構造の設計技術の開発

    浅沼春彦, 原勇心

    Offer Organization: 鹿島学術振興財団

    System: 国際共同研究

    Institution: 東北大学

    2022/08 - 2023/01

  6. 宇宙機構造の動的特性を圧電素子を１つ組み込むだけで取得する革新的システム同定手法

    原 勇心

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2020/04/24 - 2022/03/31

    More details Close

    宇宙構造物の動的特性を軌道上で取得するための構造物システム同定の基礎研究を行った．構造物の動的特性を同定するためには，構造物の加振力（入力）とその振動応答（出力）を用いる．ここで，それぞれの信号に注目した． 加振力を生成するために，圧電アクチュエータと大型のアンプを使用すると膨大なエネルギ消費が発生してしまうため，宇宙空間での運用には適さない．そこで，省エネルギで生成可能なセミアクティブ入力をシステム同定に用いることを新たに提案した．セミアクティブ入力は省エネルギで生成可能な反面，符号や振幅の制御に制約が多い．そこで，これらの制約を考慮した，構造物システム同定に適したセミアクティブ入力生成のための制御戦略を２つ新たに提案した．提案した制御戦略のため，従来の構造物システム同定手法より98％少ないエネルギで，従来手法と同程度の精度で動的特性の取得を達成した．これらの成果は，２本の国際雑誌として投稿中である． 構造物の振動応答は，システム同定に用いられる加振力に対する純粋な応答以外に，外乱によって励起された応答が重畳している．正確なシステム同定を実現するためには，振動応答から外乱応答を除去する必要がある．従来は，①外乱応答が加振力応答より小さい仮定，または，②外乱ダイナミクスに対する仮定を設けなければ，外乱除去ができなかった．我々は，モデル低次元化の概念を用いて，外乱に関する仮定を設けずに外乱応答を除去する方法を提案した．この結果，実環境で構造物に作用しうる広帯域外乱環境下でも適切に外乱応答を除去することに成功した．更に，副次的な成果として，除去した外乱応答に注目することで，外乱ダイナミクスの適切な同定も達成した．これらの成果は，１本の国際雑誌として投稿中である．

  7. Battery-Less Soft Sensor of Spacecraft Vibration with Advanced Piezoelectric Energy Harvester

    2021/10 - 2021/10

  8. 非定常で不規則な外乱環境下におけるアクティブファジィハーベスタの適応かつ剛健な運用

    原勇心

    Offer Organization: 公益財団法人 中部電気利用基礎研究振興財団

    System: 出版助成

    Institution: 東北大学

    2021/09 - 2021/09

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Teaching Experience 2

  1. Exercises in Computer-Aided Problem Solving　Tohoku University

  2. Laboratory Experiment II Aerospace Course　Tohoku University

Social Activities 1

  1. 新潟県立長岡高等学校への大学紹介