著者

福重 進也 赤星 保浩 渡辺 圭子 FURUSAWA Naomi KOURA Takao 趙 孟佑 HARADA Shoji 藤田 辰人

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2007, no.5, pp.415-416, 2007-09-07

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Space debris impact to solar array causes not only destruction of insulation layer but also impact-induced plasma. This plasma lead to arcing between two points with potential differences on the solar array, for example, high potential cell and low potential cell or substrate with a damage on the insulation layer. Joule heat of this arcing can carbonize insulation layer and create permanent short-circuit path. This is permanent sustained arc. In this study, hypervelocity impact test was conducted to a solar array coupon which was compose of grand potential substrate and high potential cell applied voltage using an external circuit to simulate condition of power generation. We measured temperature and density of plasma created by hypervelocity impact as well as current and voltage of the external circuit in order to evaluate possibility of the permanent sustained arc between high potential cell and substrate on the solar array due to a space debris impact.

著者

赤星 保浩 高良 隆男 松田 英二 福重 進也 唯岡 成好 北側 潤一 キョク デンツイ

出版者

九州工業大学工学部

雑誌

九州工業大学研究報告 工学 (ISSN:04530357)

巻号頁・発行日

no.77, pp.25-29, 2005-03

著者

赤星 保浩 花田 俊也 田村 英樹 町田 裕 福重 進也 高良 隆男

出版者

一般社団法人 日本機械学会

雑誌

年次大会講演論文集

巻号頁・発行日

vol.2006, pp.345-346, 2006

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In order to simulate the debris impacts in geosynchronous orbit, we need the launcher that can launch the projectile under approximately 1[km/sec]. We converted a two-stage light gas gun into a powder gun. In generally, though sabot separation technique is used to launch the projectile of sphere, we can not apply its technique to a our powder gun. So we also conducted the development of new separation technique of projectile of sphere. In particular, we will show with the focus on the new separation technique.

著者

赤星 保浩

出版者

九州工業大学

雑誌

基盤研究(C)

巻号頁・発行日

2009

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宇宙ごみの増加割合を低減させる目的で、2007年度にフランスよりISOに超高速衝突試験法(新たな宇宙ごみが生じにくい材料を選定するための試験方法)に関する規格案(11227)提案された。しかしながら、日本ではこのような試験を想定しておらず十分な試験体制が取れていなかったが、本研究活動を通じてその試験体制を整えた。さらに日本側から数多く修正案を提案した。本規格案は現在FDIS段階まできており、今後、ISO本部と最終確認作業を行うところまできている。

著者

岡田 仁宏 春山 繁之 赤星 保浩 安藤 竜馬 上西 研

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2005, no.1, pp.345-346, 2005-09-18

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In general, some defects may generate in manufacture process of an aluminum casting alloy. Therefore it is necessary to measure the overall and local strain with considering the effect of the defects in order to make reliable verification of the material property of the aluminum casting alloy. In this study, first of all, we verified accuracy of Strain Distribution Measuring System using a digital image correlation method by comparison with a strain gauge. Also, we measured the strain distribution of the aluminum casting alloy and compared it with the distribution of the defects inside the specimen which was examined with the X-ray CT system. As the result, we succeeded in measuring the local strain which seemed to be effected by the internal defects, by the present system.