著者
宮園 晃輝 中間 洸太 住友 佑樹 東野 伸一郎
出版者
一般社団法人 日本航空宇宙学会
雑誌
航空宇宙技術 (ISSN:18840477)
巻号頁・発行日
vol.19, pp.131-140, 2020 (Released:2020-12-05)
参考文献数
14
被引用文献数
1 1

A runway for the operation of a fixed-wind UAV cannot be always available in practical missions and there is no handy method for landing in confined space while a catapult can be used for launch. The purpose of this paper is to develop a new vertical landing method using the flat spin. Flat spin is the motion that an aircraft rotates horizontally while it is descending vertically. In order to control its touchdown position to a desired position, it is necessary to generate centripetal force to control UAV's descent path to target direction while descending vertically. This paper shows the method to change the path during vertical descent, as well as the result of flight tests and wind tunnel tests.
著者
渡辺 泰夫 石田 清道 佐野 政明
出版者
一般社団法人 日本航空宇宙学会
雑誌
日本航空宇宙学会誌 (ISSN:00214663)
巻号頁・発行日
vol.44, no.511, pp.495-497, 1996-08-05 (Released:2010-12-16)
参考文献数
5

The normal emittance of the Black High Emittance (BHE) coating for refractory tiles has been measured for the surface temperatures of 473 to 1473K. The changes between virgin and exposed tiles were evaluated, and no distinct difference was found. Effects of thin metallic and ceramic coatings on BHE were also discussed.
著者
鬼頭 史城
出版者
一般社団法人 日本航空宇宙学会
雑誌
応用力学 (ISSN:1883549X)
巻号頁・発行日
vol.5, no.27, pp.25-28, 1952 (Released:2009-05-25)

When short circuit occurs at some point (for ex., the receiving end) of ove-head transmission line, a heavy current flows along its conductors. Due to electromagnetic (attractive or repulsive) forces set up between conductors, they make swinging motions. In this paper an approximate treatment of this swinging motion has been made.
著者
山田 将史 仲瀬 寛輝 小木曽 望 南部 陽介
出版者
一般社団法人 日本航空宇宙学会
雑誌
航空宇宙技術 (ISSN:18840477)
巻号頁・発行日
vol.21, pp.31-39, 2022 (Released:2022-07-12)
参考文献数
29

Though our developed nano-satellite, HIROGARI released to orbit in March 2021 achieved the missions successfully until the end of 2021, the satellite encountered significant problems in the early operation stage. Because the satellite condition did not follow the expected behavior, the operation policy had to be decided with insufficient data. However, it was difficult to decide the operation policy rationally, since a nano-satellite has poor battery and communication margins. For the next nano-satellite development, this study constructed a resilient operation model for a nano-satellite using Systems-Theoretic Process Analysis (STPA) with lessons learned from operation experiences of HIROGARI. STPA is known as a new hazard analysis method that focuses on the interaction between a controller and the controlled object and that can be applied in conceptual design stage before detailed configurations are determined. The resilient operation model was constructed by considering the ground station as the controller and the satellite as the controlled target. Then, validity of adopting STPA to construct the operation model is discussed through comparing the unsafe control actions (UCA) and our lessons learned from operation of HIROGARI.
著者
東 昭
出版者
一般社団法人 日本航空宇宙学会
雑誌
日本航空宇宙学会誌 (ISSN:00214663)
巻号頁・発行日
vol.24, no.270, pp.309-323, 1976-07-05 (Released:2009-05-25)
参考文献数
12