| Item type |
テクニカルレポート / Technical Report(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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|
タイトル |
ジェットによる衛星ホイールのアンローディングに関する実験的研究 |
| 言語 |
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言語 |
jpn |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18gh |
|
資源タイプ |
technical report |
| その他のタイトル（英） |
|
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その他のタイトル |
Experimental Study on the Unloading of Satellite Flywheels Using Jets |
| 著者 |
村上, 力
中島, 厚
MURAKAMI, Chikara
NAKAJIMA, Atsushi
|
| 著者所属 |
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航空宇宙技術研究所宇宙研究グループ |
| 著者所属 |
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航空宇宙技術研究所宇宙研究グループ |
| 著者所属（英） |
|
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|
en |
|
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Space Technology Research Group, National Aerospace Laboratory(NAL) |
| 著者所属（英） |
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en |
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Space Technology Research Group, National Aerospace Laboratory(NAL) |
| 出版者 |
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出版者 |
航空宇宙技術研究所 |
| 出版者（英） |
|
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出版者 |
National Aerospace Laboratory(NAL) |
| 書誌情報 |
航空宇宙技術研究所報告
en : Technical Report of National Aerospace Laboratory TR-572
巻 572,
p. 18,
発行日 1979-04
|
| 抄録（英） |
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内容記述タイプ |
Other |
|
内容記述 |
Generally speaking, the unloading of flywheels for the satellite attitude control system, using gas jets, generates a very large attitude deviation, as the magnitude of jet torques are far larger than the motor torques of flywheels. Therefore, sometimes it is necessary that the mission of the satellite is intermitted during the unloading time. In this paper, the unloading is classified into two groups:one is a bit unloading, and the other is a large amount unloading at a time. The former is attained by a single pulse jet, and the latter by pulse train jets. Improvement of the former is attained by introducing concepts of program control:the flywheel is decelerated(in case of reaction wheels)at the same time as the jet is fired at a maximum torque, until the angular momentum generated by the flywheel reaches an equal level as that of the one generated by the jet. The quantity of the angular momenta is detected by sensing the angular velocity of the satellite. Therefore, the inherent uncertainty of the program control is excluded by this proposed method. Improvement of the latter is attained by the following means:at the beginning of the unloading, the main control actuator changes from the flywheel into the reaction jet. At the same time, the flywheel is decelerated at a maximum torque, until the flywheel speed reaches a desirable one. The torque is considered as a disturbance torque, which is cancelled out by the main control actuator(i.e.the jet). The above mentioned two improvement methods are experimented using an air bearing table which constructs a simulated satellite. The results show their superiority over the conventional methods. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0389-4010 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: NALTR0572000 |
| レポート番号 |
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|
内容記述タイプ |
Other |
|
内容記述 |
レポート番号: NAL TR-572 |
naltr00572.pdf (1.5 MB)
