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アイテム
宇宙機器の認定試験における衝撃応答スペクトラムの相似性と再現性の評価
https://doi.org/10.18997/00008416
https://doi.org/10.18997/0000841617281657-e0fc-4be0-a3d0-bf67beedf4a9
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
kou_k_524.pdf (7.0 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2021-07-30 | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||
| 資源タイプ | doctoral thesis | |||||||
| タイトル | ||||||||
| タイトル | Evaluation of Shock Response Spectrum Similarity and Repeatability in the Qualification Testing of Space Components | |||||||
| 言語 | en | |||||||
| タイトル | ||||||||
| タイトル | 宇宙機器の認定試験における衝撃応答スペクトラムの相似性と再現性の評価 | |||||||
| 言語 | ja | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 著者 |
Oluwatobi, Adebolu Ibukun
× Oluwatobi, Adebolu Ibukun
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | The shock loading on satellite components during any of the separation events （of rocket boosters, rocket stages, and the payload fairing） leading to the eventual separation of a satellite at its destination orbit may be detrimental to satellite components. Generally, the shock response spectrum （SRS） describes the shock severity level in a Qualification Testing （QT）. In QT, a component is subjected to an extreme （simulated） environmental condition, such as shock, as a means of guaranteeing its performance when used in an environment of similar severity. Shock simulation by a mechanical impact is one of several shock qualification test methods. The problem in QT, especially when using a mechanical impact simulator, is that the shock tests show a huge variability from test to test and generating repeatable SRS profiles that satisfy the target shock level involves a lot of trial-and-error （up to 85 have been reported in the literature）. Moreover, fully characterizing a mechanical impact involves understanding the interaction of several parameters, such as the impact velocity, impact angle, and absorber materials between impacting bodies. To reduce the number of trial- and-error and facilitate rapid testing, testing facilities match a target SRS to a database shock and retrieve its associated testing conditions. This process relies on the similarity between the target SRS and the database SRS. The purpose of this research is to investigate the SRS variation in tests simulated using an air gun shock testing machine and reduce the trial and error before satisfying a QT requirement. In particular, this research contributes a new similarity metric, the weighted RMSE, that can be used by commercial testing facilities to retrieve an SRS similar to a target SRS from a database of previous shock tests. In an SRS database retrieval task, the weighted RMSE outperformed other known SRS similarity measures in that it not only retrieves the SRS most similar to the target SRS, but also an SRS that satisfies the requirement that at least 50% of the measured SRS shall exceed the target SRS. Moreover, the SRS response of impact shocks using the air gun shock machine were characterized experimentally. This research shows that with careful data acquisition, at a given driving pressure, the knee frequency of the measured SRS is influenced by the mass and material of the projectile. The heavier, metallic projectile tends to excite a higher knee frequency, than the lighter, non-metallic projectile. | |||||||
| 目次 | ||||||||
| 内容記述タイプ | TableOfContents | |||||||
| 内容記述 | 1. Introduction||2. Literature Review||3. Retrieving an SRS from a database of shocks: Case-based Rapid Shock Qualification Testing of Spacecraft Components||4. Characterization of the Shock simulation on an air gun shock machine||5. Retrieving an SRS from a database for Rapid Qualification Testing||6. Conclusion and Future Work | |||||||
| 備考 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 九州工業大学博士学位論文 学位記番号：工博甲第524号 学位授与年月日：令和3年6月28日 | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Qualification testing | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Shock response spectrum | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | wRMSE | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Shock tuning | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | SRS variation | |||||||
| アドバイザー | ||||||||
| 趙, 孟佑 | ||||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲第524号 | |||||||
| 学位名 | ||||||||
| 学位名 | 博士（工学） | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2021-06-28 | |||||||
| 学位授与機関 | ||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||
| 学位授与機関識別子 | 17104 | |||||||
| 学位授与機関名 | 九州工業大学 | |||||||
| 学位授与年度 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 令和3年度 | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.18997/00008416 | |||||||
| ID登録タイプ | JaLC | |||||||
