基本情報
- 所属
- 国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 学際科学研究系 教授東京大学 大学院工学系研究科 化学システム工学専攻 教授横浜国立大学 総合学術高等研究院 リスク共生社会創造センター 客員教授相模女子大学 客員教授
- 学位
- 博士(工学)(東京大学)
- J-GLOBAL ID
- 200901019157833600
- researchmap会員ID
- 5000019460
- 外部リンク
研究キーワード
12経歴
14-
2024年4月 - 現在
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2023年4月 - 現在
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2023年4月 - 現在
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2022年12月 - 現在
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2022年8月 - 現在
受賞
10主要な論文
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Science and Technology of Energetic Materials : journal of the Japan Explosive Society 73(5) 147-152 2012年12月31日 査読有り筆頭著者
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航空宇宙技術(Web) 9 15-21 2010年 査読有り筆頭著者The educational hybrid-rocket was successfully launched and it also landed within the predicted area. Aerodynamic characteristics of the rocket designed by students of Tsukuba University were evaluated by the wind tunnel testing with the support of Tokai University. The flight path affected by the environmental condition, especially wind direction and velocity, was simulated with the original calculation program. The altitude of the rocket was measured with the optical equipment and the apex was 123 m although the calculation indicated 198 m. We expected that the insufficient filling or the volatilization of Nitrous oxide as an oxidizer led to this result. And then, the apex was verified with a function of the oxidizer filling ratio. The results showed that 81.2 % of the oxidizer volume in comparison with the firing test condition was accumulated in the tank at the launch.
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Science and Technology of Energetic Materials : journal of the Japan Explosive Society 67(6) 187-192 2006年12月31日 査読有り筆頭著者
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火薬学会誌 = Journal of the Japan Explosives Society : explosion, explosives and pyrotechnics 60(2) 83-90 1999年4月30日 査読有り筆頭著者
MISC
130-
日本燃焼学会誌 = Journal of the Combustion Society of Japan 65(214) 220-223 2023年11月
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日本航空宇宙学会誌 = Aeronautical and space sciences Japan 70(11) 224-233 2022年11月
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日本航空宇宙学会誌 68(4) 101-106 2020年<p>本稿では,観測ロケットベースの超小型衛星打上げ機による地球周回楕円軌道への軌道投入について,その飛行計画について概説する.本打上げ機による目標軌道は,遠地点高度約1,800 km,近地点高度約180 kmであり,近地点高度が低いために期待される軌道寿命は短い.飛行計画に対するミッション要求の一つとして,軌道寿命30日以上の軌道に衛星を投入することが挙げられる.機体誤差源や飛行環境の誤差が達成される軌道に対して大きく影響するため,これらの誤差が十分に小さくなるように管理しなければならない.ここでは観測ロケットをベースにして,どのように超小型衛星打上げ機としての要求を満足する軌道計画を立案したか,およびノミナル軌道に対する飛行分散や飛行安全に対する解析結果を示す.また飛行結果およびポストフライト解析を示し,将来的な能力向上の一案を紹介する.</p>
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日本航空宇宙学会誌 68(2) 32-37 2020年<p>本解説では,超小型衛星打上げ機(SS-520 4,5号機)の機体システム開発の概要を示す.本ロケットの開発意義は,搭載した宇宙用機器に品質の高い民生部品を活用して超小型衛星打上げシステムを作り上げたことと,従来の開発手法に加え新たに取り組んだ民生品の品質保証の考え方を構築してフライト実証したことである.また,既存の観測ロケットに衛星打上げ能力を持たせるためには,いくつかの課題を克服する必要があった.抜本的な構造軽量化,搭載機器の小型軽量化,衛星とロケット一体となった機能の最適配分,誘導制御系の工夫,飛行安全,Test as Flyをベースとした検証試験等々,限られたリソースと開発期間の厳しい制約条件のなかで随所に創意工夫を施した.本解説では,その開発におけるポイントを総括した.</p>
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観測ロケットシンポジウム2019 講演集 = Proceedings of Sounding Rocket Symposium 2019 2019年8月第2回観測ロケットシンポジウム(2019年8月5日-6日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県 2nd Sounding Rocket Symposium (August 5-6, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 著者人数: 11名 資料番号: SA6000142022 レポート番号: Ⅶ-1
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観測ロケットシンポジウム2019 講演集 = Proceedings of Sounding Rocket Symposium 2019 2019年8月第2回観測ロケットシンポジウム(2019年8月5日-6日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県 2nd Sounding Rocket Symposium (August 5-6, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 著者人数: 26名 資料番号: SA6000142023 レポート番号: Ⅶ-2
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観測ロケットシンポジウム2019 講演集 = Proceedings of Sounding Rocket Symposium 2019 2019年8月第2回観測ロケットシンポジウム(2019年8月5日-6日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県 2nd Sounding Rocket Symposium (August 5-6, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 著者人数: 17名 設計製造協力: NETS, 山本機械設計 資料番号: SA6000142024 レポート番号: Ⅷ-1
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宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web) (18-006) 45‐48 (WEB ONLY) 2019年
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宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web) (18-006) 17‐23 (WEB ONLY) 2019年
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宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web) (18-006) 25‐31 (WEB ONLY) 2019年
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宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web) (18-006) 1‐9 (WEB ONLY) 2019年
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Advances in the Astronautical Sciences 166 265-276 2018年© 2018 Univelt Inc. All rights reserved. On February 3, 2018 at the JAXA Uchinoura Space Center, JAXA experimented SS-520 No. 5 launch with a 3U sized cube sat called TRICOM-1R aboard. After liftoff, flight of SS-520 No. 5 proceeded normally. Around 7 minutes 30 seconds into flight, TRICOM-1R separated and was inserted into its target orbit. And the launcher became the world’s smallest class satellite launcher. SS-520 launch vehicle is one of sounding rockets operated in JAXA/ISAS, and originally two-stage rocket. In this experiment, to make this vehicle put a satellite into orbit, the third stage motor is added. And this sounding rocket has four tail fins for spin stabilization, but usually don’t have an attitude control system during the flight. But in this mission, it is needed to control its attitude to ignite second and third motor toward horizontal after first stage burn-out. The gas jet system is installed into between the first stage and the second stage of the vehicle as a unique active attitude control system. The gas jet system can control the spin axis direction and the spin rate of the vehicle during the coasting fight. Because of this constraint, the apogee altitude after the burn out of the first stage motor almost correspond with the perigee altitude of the elliptical orbit. In this mission, the sounding rocket-based Nano launcher is planned to put TRICOM-1R into the elliptical orbit. Its targeted apogee altitude is about 1,800 km and its perigee altitude is about 180 km. Because the perigee altitude is relatively low, the orbit life is very short. One of the mission requirements is to make the vehicle an orbit insertion with more than 30 days orbital lifetime. The vehicle error or the environment error deeply affect the achieved trajectory. These errors must be small enough to put TRICOM-1R into orbit. This paper discusses about the trajectory design on how to manage the sounding rocket into a satellite launching vehicle, the effect of the orbital distribution depending on the various errors, the flight safety analysis, and finally flight performance evaluation.
講演・口頭発表等
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Proceedings of the 2020 IEEE/SICE International Symposium on System Integration, SII 2020 2020年1月© 2020 IEEE. In recent years, expectations for low-cost and high-frequency rocket launches for space exploration have increased. Solid fuel rockets are small, inexpensive, and easy to handle. However, in the production of solid fuel, the mixing process and the transportation process are separate batch processes, leading to an increase in maintenance costs and disposal costs. In addition, being a manual process, it is difficult to manufacture large amounts simultaneously in a safe method. The authors have developed a mixing and transportation device that simulates the movement of the intestinal tract by using an elastic duct and a low pneumatic drive. In addition, actual fuel production has been carried out in a mixing and transporting experiment using this device. The effectiveness of this device has been exhibited from the combustion test of the produced fuel. In this paper, we present a high-quality and efficient method of mixing and transporting solid propellant material. This is a mixing of solid and liquid achieved by peristaltic movement done in real-time by adjusting the mixing degree of the mixture inside the device. The degree of mixing is determined by the solid propellant's volume and viscosity change. Therefore, we first investigate whether the content volume can be detected when the rigid bodies with different volumes are inserted. Next, we focus on the change in the viscosity of the mixture that occurs during the mixing process. We also examine the viscosity of the contents when fluids having different viscosities are inserted.
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AIAA Scitech 2020 Forum 2020年© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. Low toxicity ionic liquid monopropellant thrusters, such as hydroxylammonium-nitrate-based and ammonium-dinitramide-based monopropellant thruster, have been continuously developed and researched as replacement for conventional hydrazine thrusters. In this study, for the attitude and orbit control thruster of spacecraft, a chemical plasma space propulsion with ammonium dinitramide based ionic liquid has been proposed. The ignition systems have been used the discharge plasma of arc or non-equilibrium, and the generation methods of discharge plasma have been researched for decomposition and combustion of ionic liquid monopropellant. This paper presents the results of open-cup firing tests with discharge plasma for an ionic liquid monopropellant. This liquid monopropellant is a eutectic mixture of ammonium dinitramide, monomethylamine nitrate, and urea. In addition, the effects of ambient pressure on the characteristics of electric and ignition were evaluated. As a result, the breakdown and ignition of the ionic liquid were confirmed under sea-level condition and vacuum condition. After breakdown and ignition, exhaust flame was observed from downstream of reaction system at sea-level condition. In a range of ambient pressure from 10 Pa to 30 Pa, the plasma plume of decomposition gas was observed. In addition, at the each condition, the pulse discharge of unsteady state was observed from discharge waveforms after breakdown of the ionic liquid.
担当経験のある科目(授業)
2-
宇宙推進燃料工学 (東京大学工学系研究科化学システム工学専攻)
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エネルギー物質化学特論 (東京大学工学系研究科化学システム工学専攻)
Works(作品等)
3共同研究・競争的資金等の研究課題
11-
日本学術振興会 科学研究費助成事業 2023年11月 - 2030年3月
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日本学術振興会 科学研究費助成事業 2023年4月 - 2028年3月
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日本学術振興会 科学研究費助成事業 特別推進研究 2019年4月 - 2024年3月
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日本学術振興会 科学研究費助成事業 挑戦的萌芽研究 2015年4月 - 2017年3月
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日本学術振興会 科学研究費助成事業 基盤研究(A) 2012年4月 - 2017年3月