Curriculum Vitaes
Profile Information
- Affiliation
- Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Degree
- Ph.D. in Engineering(Mar, 1991, The University of Tokyo)
- J-GLOBAL ID
- 201801002275500853
- researchmap Member ID
- B000340311
Papers
55-
SMART MATERIALS AND STRUCTURES, 33(8), Aug 1, 2024
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Smart Materials and Structures, 30(6) 065014-065014, Jun 1, 2021Abstract We propose and demonstrate a novel method to enhance vibration harvesting based on surge-induced synchronized switch harvesting on inductor (S3HI). S3HI allows harvesting of a large amount of energy even from low-amplitude vibrations by inducing a surge voltage during the voltage inversion of a synchronized switch harvesting on inductor (SSHI). The surge voltage and the voltage amplification from the conventional voltage inversion improve energy harvesting. S3HI modifies SSHI by both rewiring the circuit without adding components and using a novel switching pattern for voltage inversion, thus maintaining the simplicity of SSHI. We propose a novel switching strategy and circuit topology and analyze six methods that constitute the S3HI family, which includes traditional S3HI and high-frequency S3HI. We demonstrate that the six methods suitably harvest energy even from low-amplitude vibrations. Nevertheless, the harvestable energy per vibration cycle depends on the switching pattern and storage-capacitor voltage. The use of the proposed switching strategy, which allows energy harvesting before energy-dissipative voltage inversion, substantially increases the harvestable energy per vibration cycle. In the typical case considered in this study, the said increase is on the order of 11%–31% and 15%–450% compared to the traditional and existing high-frequency S3HI methods, respectively, depending on the storage-capacitor voltage. Additionally, the proposed circuit can be used as a traditional circuit. It could be considered a promising alternative to S3HI methods owing to its potential auto-reboot capability, which is not found in traditional S3HI circuit.
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN, 16(2) 181-187, 2018<p>An Extensible Optical Bench (EOB) for a X-ray satellite (ASTRO-H) had a length of 6.4m in extended configuration. Although the same type of extensible mast was used in Space Radio Telescope (Halca) in 1997, the tip mass was quite different in the case of ASTRO-H. Due to the tip mass of 150 kg, the natural frequency of EOB was less than 1Hz in the extended configuration. ASTRO-H was launched on Feb. 17, 2016, and the EOB was extended on Feb. 28, 2016, successfully. However, because the vibration of EOB occurred during the extension, the extension operation was carried out over four passes intermittently. When the amplitude of induced vibration excessed the predefined threshold, we stopped the extension, then stayed until the vibration was damped. In this paper, the induced vibration during extension and its mechanism are reported. Through simulations, it is confirmed that one of the major causes of the vibration is a periodic change of gap between mast and canister at the root of EOB.</p>
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Journal of Astronomical Telescopes, Instruments, and Systems, 4(1), Jan 1, 2018 Peer-reviewed
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JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, 28(7) 888-906, Apr, 2017 Peer-reviewed
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Proceedings of the International Astronautical Congress, IAC, 2016
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Meeting Abstracts of the Physical Society of Japan, 71 369-369, 2016
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Proceedings of the International Astronautical Congress, IAC, 8 6422-6428, 2015
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Trans Jpn Soc Aeronaut Space Sci Aerosp Technol Jpn (Web), 12(ists29) PC.29-PC.34 (J-STAGE), 2014
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Frontiers of Mechanical Engineering, 8(3) 276-282, Sep, 2013
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Telescope Co-Alignment Design and Its Performance On-Orbit of Solar Observational Satellite "Hinode"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 56(2) 104-111, Mar, 2013 Peer-reviewed
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Smart Materials Research, 2011(Article No. 686289) 1-8, Dec 30, 2011 Peer-reviewedWe conduct comprehensive investigation of a semiactive vibration suppression method using piezoelectric transducers attached to structures. In our system, piezoelectric transducers are connected to an electric circuit composed of the diodes, an inductance, and a selective switch. Our method (SSDI) makes better use of counterelectromotive force to suppress the vibration, instead of simple dissipation of vibration energy. We use an actual artificial satellite to verify their high performance compared to conventional semi-active methods. As a consequence, we demonstrate that our semi-active switching method can suppress the vibration of the real artificial satellite to as much as 50% amplitude reduction. In our experiment, we reveal that the suppression performance depends on how multiple piezoelectric transducers are connected, namely, their series or parallel connection. We draw two major conclusions from theoretical analysis and experiment, for constructing effective semi-active controller using piezoelectric transducers. This paper clearly proves that the performance of the method is the connection (series or parallel) of multiple piezoelectric transducers and the their resistances dependent on frequency.
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Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2011 Peer-reviewed
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Smart Materials and Structures, 19 1-10, Aug, 2010 Peer-reviewed
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61st International Astronautical Congress 2010, IAC 2010, 13 10997-11003, 2010
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61st International Astronautical Congress 2010, IAC 2010, 8 6084-6089, 2010
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7th Asian-Australasian Conference on Composite Materials 2010, ACCM 2010, 2 839-842, 2010 Peer-reviewed
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ACTIVE AND PASSIVE SMART STRUCTURES AND INTEGRATED SYSTEMS 2010, PTS 1 AND 2, 7643, 2010 Peer-reviewed
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Solar Physics, 249(2) 263-279, Jun, 2008
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PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 59 S845-S852, Nov, 2007 Peer-reviewed
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SMART MATERIALS & STRUCTURES, 16(2) 455-461, Apr, 2007 Peer-reviewed
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JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, 129(1) 84-93, Feb, 2007 Peer-reviewed
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AIAA JOURNAL, 45(2) 497-504, Feb, 2007 Peer-reviewed
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 49(166) 203-210, Feb, 2007 Peer-reviewed
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IFAC Proceedings Volumes (IFAC-PapersOnline), 17(1) 597-602, 2007
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International Astronautical Federation - 58th International Astronautical Congress 2007, 8 5187-5194, 2007
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KSAS, International Journal of Aeronautical and Space Sciences, 7(1) 70-85, Nov, 2006 Peer-reviewed
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AIAA JOURNAL, 44(7) 1445-1453, Jul, 2006 Peer-reviewed
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Smart Materials and Structures, 15 342-350, Apr, 2006 Peer-reviewed
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AIAA Journal, 44(2) 411-413, Feb, 2006 Peer-reviewed
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Performance investigation of energy-efficient active vibration control using energy-recycling method16th International Conference on Adaptive Structures and Technologies, 125-132, 2006
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Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 9 6083-6095, 2006
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SMART STRUCTURES AND MATERIALS 2006: DAMPING AND ISOLATION, 6169, 2006 Peer-reviewed
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AIAA Journal, 43(8) 1706-1715, Aug, 2005 Peer-reviewed
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Journal of Vibration and Acoustics, Transaction of the ASME, 126 272-277, Apr, 2004 Peer-reviewed
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International Astronautical Federation - 55th International Astronautical Congress 2004, 12 8142-8148, 2004
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OPTICAL, INFRARED, AND MILLIMETER SPACE TELESCOPES, PTS 1-3, 5487 1142-1151, 2004 Peer-reviewed
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Proc. 55th Intern. Astronautical Cogress, ZARM IAC-04-IAF-V.1.02, 1-7, 2004
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AIAA Journal, 41(4) 711-719, Apr, 2003 Peer-reviewed
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54th International Astronautical Congress of the International Astronautical Federation (IAF), the International Academy of Astronautics and the International Institute of Space Law, 1 1557-1562, 2003
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Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 6 4306-4316, 2003
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Simultaneous Optimization of Piezoelectric Actuator Placement and Feedback for Vibration SuppressionActa Astronautica, 50(6) 335-341, Mar, 2002 Peer-reviewed
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Simultaneous optimization of intelligent structure and feedback gains for flexible structure controlAUTOMATIC CONTROL IN AEROSPACE 2001, 471-476, 2002 Peer-reviewed
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ournal of Vibration and Acoustics, Transaction of the ASME, 122 412-419, Oct, 2000 Peer-reviewed2000,
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AIAA Journal, 38(9) 1736-1741, Sep, 2000 Peer-reviewed2000,
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AIAA Journal, 35(12) 1844-1852, Dec, 1997 Peer-reviewed
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Acta Astronautica, 40(11) 771-779, Nov, 1997 Peer-reviewed
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JOURNAL OF SPACECRAFT AND ROCKETS, 33(3) 416-421, May, 1996 Peer-reviewed
Misc.
93-
SPACE TELESCOPES AND INSTRUMENTATION 2024: ULTRAVIOLET TO GAMMA RAY, PT 1, 13093, 2024
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SPACE TELESCOPES AND INSTRUMENTATION 2024: ULTRAVIOLET TO GAMMA RAY, PT 1, 13093, 2024
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観測ロケットシンポジウム2020 講演集 = Proceedings of Sounding Rocket Symposium 2020, Mar, 20213rd Sounding Rocket Symposium (March 24-25, 2021. Online Meeting)
Presentations
13-
33rd International Symposium on Space Technology and Science, Mar 1, 2022
Teaching Experience
2-
Oct, 2024 - Jan, 2025飛翔体構造工学概論 (東京大学大学院工学系研究科航空宇宙工学専攻)
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Sep, 2024 - Sep, 2024衛星システム設計学特論 (公立大学法人大阪)
Research Projects
12-
科学研究費助成事業, 日本学術振興会, Apr, 2023 - Mar, 2027
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科学研究費助成事業 基盤研究(C), 日本学術振興会, Apr, 2020 - Mar, 2023
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2018
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, 2008 - 2010
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, 2007 - 2008