研究者業績

森田 泰弘

モリタ ヤスヒロ  (Yasuhiro Morita)

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 宇宙飛翔工学研究系 教授
学位
工学博士(東京大学)
工学修士(東京大学)

J-GLOBAL ID
200901060615181820
researchmap会員ID
1000144472

外部リンク

論文

 9
  • Hirohito Ohtsuka, Naruhisa Sano, Masaru Nohara, Yasuhiro Morita, Takahiro Ito, Takayuki Yamamoto, Hiroto Habu
    Advances in the Astronautical Sciences 171 3903-3918 2020年  
    © 2020, Univelt Inc. All rights reserved. ISAS/JAXA has successfully launched the micro-satellite “TRICOM-1R” by the world’s smallest orbit rocket “SS-520 No.5” from Uchinoura Space Center on February 3rd in 2018. ISAS modified the existing sounding rocket SS-520 adding a small 3rd-stage solid-motor and the attitude control system. It flies spinning for the attitude stabilization in the flight. Therefore, we devised the rhumb-line control system with a new scheme. This rhumb-line system has the high-performance functions; the high-preciseness, the high-maneuver rate and the suppression of the unnecessary nutation angle generated at the RCS injection. This paper reports the development of the G&C system and the flight results.
  • Hirohito Ohtsuka, Yasuhiro Morita, Kensaku Tanaka, Takanao Saiki, Takayuki Yamamoto, Hiroyuki Yamaguchi, Yasunobu Segawa, Hitomi Gotoh
    Advances in the Astronautical Sciences 156 2063-2073 2016年  
    The first Epsilon rocket was launched successfully with a small payload 'HISAKI' on September 14th, 2013 in Japan. Epsilon has a new absorber structure in Payload Attach Fitting to reduce the vibration condition for payload. We designed the robust control logic to satisfy the compatibility of robust stability and response against various disturbances. The 3rd Stage under spinning has a Rhumb-line Control function which reduces the pointing error at separation and ignition of solid motor. We could insert the payload into the orbit precisely by 'LVIC' guidance, suitable for low thrust propulsion in Post Boost Stage. We will present the flight results of the Guidance & Control (G&C) system and dynamics of Epsilon rocket.
  • 大塚 浩仁, 田中 健作, 斉藤 晃一, 森田 泰弘, 加藤 洋一, 佐伯 孝尚, 山本 高行, 後藤 日当美, 山本 一二三
    日本航空宇宙学会誌 63(5) 148-154 2015年  
    イプシロンロケットは2013年9月14日に惑星分光観測衛星「ひさき」の打上げに成功し,目標とした軌道投入精度を達成し,新規に開発した誘導制御系の性能を遺憾なく発揮した.イプシロン開発では,惑星探査機「はやぶさ」を投入したM-Vロケットの誘導制御系の性能を継承しつつ新たな技術革新にチャレンジし,M-Vの機能,性能をさらに向上させた誘導制御系を実現した.最終段には信頼性の高い低コストなスラスタを用いた液体推進系の小型ポストブースタ(PBS)を開発し,新たに導入した誘導則とともに軌道投入精度を飛躍的に向上させた.フライトソフトにはM-Vで蓄積した各種シーケンスや姿勢マヌーバ機能をユーティリティ化して搭載し,科学衛星ユーザ等の多様な要望に容易に対応できる機能を実現し運用性を高めた.
  • 徳留 真一郎, 井元 隆行, 森田 泰弘
    溶接学会誌 83(3) 215-219 2014年  
  • Yasuhiro Morita, Takayuki Imoto, Shinichiro Tokudome, Hirohito Ohtsuka
    Proceedings of the International Astronautical Congress, IAC 11 8242-8248 2013年  
    The Epsilon launch vehicle, the newest version of Japan's solid propulsion rocket, has successfully had its maiden flight in this September carrying the extreme ultra-violet planetary telescope satellite SPRINT- A. It should be emphasized that the JAXA appreciates the advantages of combined power of the standardized small satellites and the Epsilon's highly efficient launch system, both developed by JAXA, to increase the level of space activities. Although the launch site of the Epsilon rocket, the Uchinoura Space Center (USC), was originally considered a highly compact launch complex, some modifications were made to become more efficient. The efficient launch vehicle and the compact USC established one of the most powerful tools that contribute to small missions (tentatively, maximum 1.2 ton into LEO and 450kg into SSO, as of the first flight). The purpose of the Epsilon rocket is to provide small satellites with a responsive launching, which means in this study we focus on a low cost, user friendly and ultimately efficient launch system. To realize this, the design concept of the Epsilon involves various innovative next generation technologies such as the highly intelligent autonomous checkout system and the mobile launch control. Owing to these endeavors, it was proved that the lift-off can be executed in less than 6 days after the first stage motor stand-on although the first flight took longer for extra tests and operations to complete the entire development. Another aspect that small satellites will most welcome is more user-friendly character involving: A reduction in the acoustic vibration level by refined ground facilities an attenuation of the sinusoidal vibration environment by a special vibration attenuator and a highly accurate orbit injection by a liquid propelled upper stage. Their effectiveness was well demonstrated. Now that the first flight was finished, the most important is what the next step will be in the future. JAXA has been conducting intensive researches on a next generation Epsilon to launch a more powerful and lower cost version Epsilon (El) in 2017 (TBD). In order to minimize the level of technical risks, JAXA plans to take a step by step approach to improve the cost and performance of the launch system toward El. According to this strategy, the second flight will be conducted in 2015 with an enhanced launch capacity of more than 500kg into SSO. This paper provides the results of the first flight of the Epsilon and reveals its evolution plan. Copyright© (2013) by the International Astronautical Federation.
  • Takayuki Imoto, Yasuhiro Morita, Shinichiro Tokudome, Hirohito Ohtsuka
    Advances in the Astronautical Sciences 146 625-629 2013年  
    The Epsilon launch vehicle has two main objectives. One is to evolve the highly efficient launch vehicle using the solid rocket system technologies that we have obtained for more than fifty years. The other is to meet the needs of the small satellites whose market will grow in the near future definitely. The needs and the demands of the small satellites have been flowdowned to the requirements of the Epsilon launch vehicle. As a next generation launch system, the Epsilon launch vehicle has several special features. The level of user friendliness is increased including more accurate orbit insertion precision, lower acoustic environment and lower separation shock level. It is optimized from the point of view of both cost and performance. This paper describes the system design of the Epsilon launch vehicle.
  • Yasuhiro Morita, Takayuki Imoto, Shinichiro Tokudome, Hirohito Ohtsuka
    Proceedings of the International Astronautical Congress, IAC 11 8579-8588 2012年  
    The development of the Epsilon launch vehicle, Japan's next generation solid rocket launcher, has just moved on to the final stretch for its first launch scheduled in summer of 2013 carrying the planetary telescope satellite SPRINT-A. It should be emphasized that the JAXA appreciates the advantages of combined power of the standardized small satellites and the Epsilon's highly efficient launch system, both developed by JAXA. The launch site of the Epsilon rocket is the Uchinoura Space Center (USC), the home of Japan's solid rockets, which will be modified to become more efficient although it is already a highly compact launch complex. The efficient launch vehicle and the compact USC will establish one of the most powerful tools that contribute to small missions (maximum 1.2 ton into LEO and 450kg into SSO as of the first flight). The purpose of the Epsilon rocket is to provide small satellites with a responsive launching, which means in this study we focus on a low cost, user friendly and ultimately efficient launch system. To realize this, the design concept of the Epsilon involves various innovative next generation technologies such as the highly intelligent autonomous checkout system and the mobile launch control. Owing to these endeavors, the lift-off will be executed in less than 6 days after the first stage motor stand-on. Another aspect that small satellites will most welcome is more user-friendly characteristics involving improvements in: The acoustic vibration level at ignition by refined ground facilities the sinusoidal vibration environment by a special vibration attenuator and the orbit injection accuracy by a liquid propelled upper stage. Now that the full-scale development is about to be finished, the most important is what the next step should be beyond the Epsilon. JAXA has already announced the post Epsilon development to launch a low cost version Epsilon (El) in 2017. Note that the strategy taken to lower the cost will be mainly based on using lighter and lower cost materials, thus resulting in higher performance as well. In order to minimize the level of technical risks, JAXA plans to take a step by step approach to improve the cost and performance of the launch system toward El and the second flight will be conducted in 2015 with an enhanced launch capacity of more than 500kg into SSO. This paper provides the details of the final phase of the Epsilon development and reveals its evolution plan. Copyright © (2012) by the International Astronautical Federation.
  • MORITA Yasuhiro, IMOTO Takayuki, TOKUDOME Shinichiro, OHTSUKA Hirohito
    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 10(28) Tg_19-Tg_24 2012年  
    The Epsilon rocket, formerly called Advanced Solid Rocket (ASR) launcher, proceeded to the full development phase in August 2010 and its launch site was officially declared to be the Uchinoura Space Center (USC), the home of Japanese solid propellant rocket. The primary purpose of Epsilon is to provide small satellites with a responsive launch that means a low cost, user-friendly and ultimately efficient launch system. The slogan is "Small, Cheap, Fast and Reliable". This outcome is also a result of the excellent endeavors of those who devoted themselves to the next generation solid propellant rocket. However, this is not the final destination. Now that the development was approved, the most important is what the next step should be beyond Epsilon. This paper deals with the significance of the development of Epsilon launch vehicle and how it contributes to the possible evolution of future space transportation systems.
  • Yasuhiro Morita, Takayuki Imoto, Shinichiro Tokudome, Hirohito Ohtsuka
    62nd International Astronautical Congress 2011, IAC 2011 9 7335-7341 2011年  
    In January, 2011, the launch site of the Epsilon rocket was officially declared to be the Uchinoura Space Center (USC), the home of Japanese solid propellant rockets since the Japan's first satellite was launched in 1970. The development of the Epsilon launch vehicle is now about to advance to its detailed design level to prepare for its first flight, scheduled to be carried out in 2013. The primary purpose of Epsilon is to provide small satellites with a responsive launch that means a low cost, user-friendly and ultimately efficient launch system. The innovative design concept of the Epsilon launch vehicle will greatly contribute to increase the level of the space transportation technologies. However, this is not the final destination. Equally important is what the next step should be beyond Epsilon. This paper deals with the current development status of the Epsilon launch vehicle and its intended evolution. Copyright ©2011 by the International Astronautical Federation. All rights reserved.

MISC

 100
  • 山口敬之, 森田泰弘, 井元隆行, 横田清美, 山本高行, 佐伯孝尚, 大塚浩仁, 田中健作
    宇宙科学技術連合講演会講演集(CD-ROM) 63rd 2019年  
  • Hiroyuki Yamaguchi, Yasuhiro Morita, Takayuki Imoto, Takayuki Yamamoto, Takanao Saiki, Hirohito Ohtsuka, Kensaku Tanaka
    Advances in the Astronautical Sciences 166 233-241 2018年  
    © 2018 Univelt Inc. All rights reserved. The Epsilon launch vehicle, the newest version of Japan’s solid propulsion rocket, made its maiden flight in September of 2013. The purpose of the Epsilon launch vehicle is to provide small satellites with responsive launching with low-cost, user-friendly and efficient launch system. The first flight was successfully finished, JAXA has been conducting intensive researches on a more powerful and lower cost version of Epsilon. In order to minimize technical risks and to keep up with demand of future payloads, JAXA plans to take a step-by-step approach toward Future Launch System. As the first upgrade toward Future Launch System, JAXA has started the development of the Enhanced Epsilon. This development is mainly the renewal of the second stage, and also includes each subsystem’s improvement. This paper describes the development and flight result of the Enhanced Epsilon’s Guidance and Control System.
  • 五十地 輝, 大田部 晃, 植松 努, 加藤 信治, 堀 恵一, 森田 泰弘, 秋葉 鐐二郎
    宇宙科学技術連合講演会講演集 60 4p 2016年9月6日  
  • 山口 敬之, 森田 泰弘, 井元 隆行, 山本 高行, 佐伯 孝尚, 森 治, 池本 和晃, 大塚 浩仁, 田中 健作
    宇宙科学技術連合講演会講演集 60 4p 2016年9月6日  
  • 森田 泰弘
    宇宙科学技術連合講演会講演集 60 5p 2016年9月6日  

書籍等出版物

 2

共同研究・競争的資金等の研究課題

 17