博碩士論文 963207008 詳細資訊




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姓名 黃冠笙(Guan-Sheng Huang)  查詢紙本館藏   畢業系所 光機電工程研究所
論文名稱 星象模擬器之開發
(N/A)
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摘要(中) 本論文研究以用於即時星象模擬器之亮度分佈演算法為目標。演算法
的核心在於運用顯示畫面的一組像素的亮度分佈來模擬星體資料庫中的
恆星亮度及位置,並且可以即時更新畫面以滿足追星儀的影像擷取速率。
由於像素的亮度有限,因此一個恆星的星等的總亮度會由多個像素的亮度
總和來模擬,而恆星在視野裡的位置則由調整各像素的亮度所形成的亮度
重心來模擬。模擬計算所得的亮度與位置的誤差因模擬的星等而異,一等
星亮度及位置誤差分別為+-0.15%及0.008pixel,越暗的星模擬誤差越大,
六等星為+- 6%及0.25pixel。若以NASA 的SWAS 衛星星象追蹤儀所用的
任務星體資料庫為模擬的依據,設定視域對角線的夾角為40 度 ,以
1024x768 像素解析度來顯示星象,則視域裡需要模擬的恆星數最多約250
顆,而畫面的最長更新時間為32ms。因此模擬器的效能可以滿足測試星
象追蹤儀的需求。
摘要(英) This research is to develop the distribution algorithm of star
brightness utilized in a real-time stellar image generator. The
core computation is to determine the brightness distribution of a
group of brightness limited pixels to represent the brightness of
a star and the location of the star by the brightness weighted
geometric center of the pixels. The accuracy of brightness and
positioning of a star simulation obtained is dependent upon its
magnitude. The maximum deviation in brightness is +- 0.15% for
magnitude 1 and +- 6% for magnitude 6, while the position error is
0.008 and 0.25 pixel respectively. The maximum image update time
is 32ms when the simulation field of view is 40 degree by 1024x 768
pixels based on the onboard star tracker catalog of NASA SWAS
Satellite. Number of stars in this simulation may reach
250.Therefore, the efficiency of stellar image simulator can match
the requirement of the star tracker test.
關鍵字(中) ★ 星象追蹤儀
★ 光學激發器
★ 星象儀
★ 星象模擬器
★ 星體亮度分佈演算法
關鍵字(英) ★ celestial globe
★ stellar image simulator
★ star tracker optical simulator
★ star globe
★ computation of brightness distribution for star image simulation
論文目次 論文摘要....................................................................................... i
Abstract........................................................................................ ii
致謝............................................................................................. iii
目錄............................................................................................. iv
圖目錄......................................................................................... vi
表目錄....................................................................................... viii
縮寫及符號................................................................................. ix
一、 緒論.................................................................................. 1
1.1 前言....................................................................................................1
1.2 研究動機............................................................................................1
1.3 論文架構說明....................................................................................2
二、 研究背景.......................................................................... 4
2.1 星象追蹤儀........................................................................................4
2.1.1 姿態控制的重要性....................................................................4
2.1.2 星象追蹤儀的重要性................................................................5
2.1.3 星象追蹤儀的發展....................................................................6
2.1.4 星象追蹤儀相關參數..............................................................10
2.1.5 星象追蹤儀的工作模式..........................................................13
2.2 星象模擬器......................................................................................16
2.2.1 星象模擬器的重要性..............................................................17
三、 理論說明........................................................................ 19
3.1 FOV 演算法......................................................................................19
3.1.1 方向與座標定義......................................................................19
3.1.2 天球座標系與垂直座標系......................................................20
3.1.3 資料庫查詢星象......................................................................24
3.1.4 外接四邊型內的星體影像的直角座標..................................27
3.2 星體亮度分佈演算法......................................................................28
3.2.1 問題描述..................................................................................28
3.2.2 理論說明..................................................................................28
四、 演算法與星象模擬器實現方法..................................... 43
4.1 程式開發環境..................................................................................43
4.2 FOV 演算法實現..............................................................................44
4.3 星體亮度分佈演算法實現..............................................................45
4.4 星象模擬器實現..............................................................................48
4.5 星象模擬器操作介面......................................................................50
五、 實驗設計與數據分析..................................................... 56
5.1 亮度分佈演算法誤差分析..............................................................56
5.1.1 實驗設計與分析方法..............................................................56
5.1.2 數據分析與說明......................................................................58
5.2 模擬器之更新頻率測試..................................................................71
5.2.1 實驗設計與分析方法..............................................................71
5.2.2 數據分析與說明......................................................................73
六、 結論................................................................................ 76
6.1 結論...................................................................................................76
6.2 未來展望...........................................................................................77
七、 參考文獻........................................................................ 78
參考文獻 〔1〕YANG Jian, ZHANG Guang-jun, JIANG Jie and FAN Qiao-yun, “ Semi-physical Simulation Test for Micro CMOS Star Sensor” , International Symposium on Photoelectronic Detection and Imaging, Volume 6622, pp. 66220E, March 2008
〔2〕Liebe, C.C., “Star Trackers for Attitude Determina tion.pdf” , IEEE Aerospace and Electronic Systems Magazine, vol. 10, no. 6, p. 10-16, June 1995
〔3〕Francis C.Wessling and MarkA. Vander Does, “The Star Field Simulator for the Spacelab Instrument Pointing System Fixed Head Star racker”, SPIE The International Society for Optical Engineering Vol. 2221, p. 116-127,1994
〔4〕Allan Read Eisenman, Carl Christian Liebe and John Leif Jorgensen, “The New Generation of autonomous star trackers”, SPIE The International Society for Optical Engineering Vol. 3221, p. 524-535,1997
〔5〕YAN Guangwei and HU Haitao, “Research on Techniques for Computer Three-Dimensional Simulation of Satellites and Night sky”, Second International Conference on Space Information Technology Vol. 6795, pp. 67954X, 2007
〔6〕Liebe, C.C., “Accuracy Performance of Star Trackers–A Tutorial,”
IEEE Transactions on Aerospace and Electronic Systems, Vol. 38, No. 2, pp. 587-599, April 2002.
〔7〕網路資料:MySQL。取自http://zh.wikipedia.org/w/index.php?title=MySQL&variant=zh-hant。
〔8〕網路資料:Flight Dynamics’ Star Catalog Database。取自https://wakata.nascom.nasa.gov//dist/generalProducts/attitude/ATT_SKYMAP.html。
指導教授 葉則亮(Tse-Liang Yeh) 審核日期 2009-7-23
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