口徑550 mm反射鏡減重與撓性支撐結構最佳化設計

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姓名

黃柏愷(Bo-Kai Huang) 查詢紙本館藏

畢業系所

光機電工程研究所

論文名稱

口徑550 mm反射鏡減重與撓性支撐結構最佳化設計
(Optimum Design of the Lightweighting Structure and Flexure Mounts for a 550 mm Mirror)

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摘要(中)

衛星酬載遙測取像儀用於地表觀測，需承受高真空、高溫差、重力、25 G發射重力加速度、振動等嚴苛環境，因此在取像儀光學系統的設計中，不只考慮光學品質的要求，亦需考慮其機械結構是否能承受惡劣的工作環境，故針對遙測取像儀之主鏡進行最佳化設計。本文利用一口徑550 mm的Zerodur®主鏡，搭配參數最佳化軟體串聯電腦輔助設計、有限元素分析軟體、光機轉換程式，進行主鏡減重與撓性支撐結構最佳化設計，最佳化內容包含: 輕量化、維持剛性、良好光學品質。主鏡經過最佳化設計後減重比達66%；撓性支撐結構經過最佳化設計後，主鏡系統PV值為61 nm，RMS值為12 nm，第一共振頻率為315 Hz。

摘要(英)

Remote sensing instrument (RSI, Remote Sensing Instrument), which is used to take images for ground surface observation, will be exposed to harsh environment including vacuum, large temperature difference, high launch acceleration and random vibration. Therefore, both the optical quality and the mechanical strength should be considered when designing the optical system of a RSI. In this study, an optimization method was adopted in the lightweight design of a Zerodur® mirror and its bi-pod flexure. The optimization aims to achieve the lightest mirror while maintaining both structural rigidity and good optical quality. An optimization processing combining computer-aided design, finite element analysis, opto-mechanical analysis and optimization algorithm was successfully performed. Finally, the optimum lightweight mirror and its three optimum bi-pod flexure mounts were attained.

關鍵字(中)

★ 遙測取像儀
★ 輕量化
★ 最佳化
★ 電腦輔助設計
★ 有限元素模擬分析
★ 光機轉換

關鍵字(英)

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 v
圖目錄 vii
表目錄 xiii
第一章前言 1
1.1 研究背景 1
1.2 文獻回顧 2
1.3 研究目的 10
第二章理論基礎 11
2.1 最佳化概論 11
2.2 最佳化軟體 14
2.3 最佳化流程 15
第三章福衛八號主鏡減重結構最佳化設計與分析 17
3.1福衛八號主鏡初始設計 17
3.2福衛八號主鏡減重有限元素分析 20
3.3福衛八號主鏡減重最佳化設計分析 23
3.4福衛八號主鏡減重最佳化設計與分析小結 30
第四章福衛八號撓性支撐結構最佳化設計與分析 31
4.1福衛八號撓性支撐結構初始設計 31
4.2福衛八號撓性支撐結構有限元素模擬分析 33
4.3福衛八號撓性支撐結構靈敏度分析 35
4.4福衛八號撓性支撐結構最佳化設計分析 37
4.5福衛八號撓性支撐結構結構膠分析 43
4.6福衛八號撓性支撐結構最佳化設計分析小結 46
第五章八吋反射鏡撓性支撐結構最佳化設計 49
5.1八吋反射鏡規格 49
5.2八吋反射鏡撓性支撐結構初始設計 50
5.3八吋反射鏡撓性支撐結構有限元素模擬分析 51
5.4八吋反射鏡撓性支撐結構最佳化設計分析 52
5.5八吋反射鏡撓性支撐結構結構膠分析 58
5.6八吋反射鏡撓性支撐結構最佳化設計分析小結 60
第六章八吋反射鏡系統實驗驗證 61
6.1八吋反射鏡干涉儀量測實驗原理與架構 61
6.2大口徑反射鏡多軸姿態調整平台 64
6.3八吋反射鏡撓性支撐結構組裝流程 67
6.4干涉儀量測結果 83
第七章結論與未來工作 95
參考文獻 96

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指導教授

陳怡呈(Yi-Cheng Chen)

審核日期

2015-8-6

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