Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/89449
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dc.contributor蕭宇伸zh_TW
dc.contributor.author王偉龍zh_TW
dc.contributor.authorWei-Lung Wangen_US
dc.contributor.other水土保持學系所zh_TW
dc.date2014zh_TW
dc.date.accessioned2015-12-07T08:06:12Z-
dc.identifierU0005-2811201416184646zh_TW
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dc.identifier.urihttp://hdl.handle.net/11455/89449-
dc.description.abstract本研究利用船載慣性測量元件(Inertial Measurement Unit, IMU)及全球定位系統(Global Positioning System, GPS)資料進行估算重力值,並進行嚴密的精度分析。IMU與GPS資料來源為國土測繪中心於2011年辦理的「臺灣本島近岸船載重力測量」計畫。資料前處理過程中,考慮各種濾波方式與不同的罩窗寬度組合,以濾波後IMU與GPS的相關係數與差值標準偏差,來決定最佳的濾波方式。計算重力時,再以高斯濾波消除雜訊,以期獲得最佳之重力值。最終重力結果與ZLS船載重力儀和EGM08比較並分析其精度。 研究結果顯示(1)高斯濾波與餘弦濾波對消除雜訊有較佳的結果。(2)航線0514c的IMU與 GPS初始資料,分別在高斯濾波罩窗寬度5.5秒與2秒時,有最高相關係數值0.88。 (3) 航線0519a的IMU與 GPS初始資料,分別在高斯濾波罩窗寬度5.0秒與1秒時,也有最高相關係數值0.88。(4)本研究重力值最佳精度在航線2-2,在使用濾波罩窗寬度200 ? 500秒的精度約為40 ? 50 mgal,而在使用濾波罩窗寬度1000? 1500秒則可達到約20 ? 30 mgal。zh_TW
dc.description.abstractThe study is aimed at gravity estimation by using Inertial Measurement Unit(IMU) and Global Positioning System(GPS) data, and the accuracies of results are rigorously analyzed. The IMU and GPS data are from the proposal 「Shipborne gravity survey over the inshore areas of Taiwan」 sponsored by National Land Surveying and Mapping Center (NLSC) in 2011. In the step of data pre-processing, we consider different filter techniques and widths to determine a best filter combination according to the correlation coefficients and standard deviations between GPS and IMU data. Gaussian filter is adopted again to eliminate data noises in the step of gravity computation. The results are evaluated both by ZLS ship-derived and by EGM08-derived gravity. We conclude that (1) Gaussian and Cosine arch filters both exhibit more excellent results than others. (2) In Route 0514c, the best correlation coefficient 0.88 are occurred when the Gaussian filter widths use 5.5 s for IMU, and 2 s for GPS. (3) In Route 0519a, the best correlation coefficient 0.88 are occurred when the Gaussian filter widths use 5.0 and 1 s for IMU and GPS, respectively. (4) Route 2-2 show the best result that the accuracies reach 40 ? 50 mgal at Gaussian filter widths 200 ? 500s, and reach 20 ? 30 mgal at 1000 ? 1500 s.en_US
dc.description.tableofcontents第一章、 緒論 1 1.1 前言 1 1.2 研究動機 1 1.3 文獻回顧 2 1.4 論文架構 4 第二章、 研究方法與原理 5 2.1 衛星定位測量原理 5 2.2 慣性導航系統 6 2.3 坐標系統 7 2.3.1 IMU/GPS常用的坐標系統 8 2.3.2 各坐標系統間的關係 10 2.3.3 導航方程式 12 第三章、 研究資料及儀器與研究流程 27 3.1 任務簡介 27 3.1.1 施測範圍、儀器、測量船隻簡介 27 3.1.2 IMU資料介紹 30 3.1.3 檢核重力成果使用資料 36 3.2 研究流程及資料前處理 36 3.2.1 GPS資料前處理 36 3.2.2 IMU資料前處理 38 3.2.3 研究流程 38 第四章、 濾波器相關原理與結果 41 4.1 濾波器選擇及原理 41 4.1.1 資料前處理階段 41 4.1.2 計算重力階段 42 4.2 濾波器相關計算結果 43 4.3 濾波罩窗寬度選擇 49 第五章、 研究成果與精度分析 56 5.1 計算結果(完整航線) 56 5.1.1 航線0514c的重力結果 56 5.1.2 航線0519a的重力異常值結果 58 5.2 重力異常值計算結果(分段航線) 60 5.2.1 航線0514c的精度分析 60 5.2.2 航線0519a的精度分析 66 5.3 與洛磯山脈和墨西哥灣空載重力比較 71 第六章、 結論與建議 74 6.1 結論 74 6.2 建議 75 參考文獻 76 附錄一 80 附錄二 81zh_TW
dc.language.isozh_TWzh_TW
dc.rights同意授權瀏覽/列印電子全文服務,2016-08-31起公開。zh_TW
dc.subject慣性測量元件zh_TW
dc.subject全球定位系統zh_TW
dc.subject濾波zh_TW
dc.subject重力zh_TW
dc.subjectIMUen_US
dc.subjectGPSen_US
dc.subjectfilteren_US
dc.subjectgravityen_US
dc.titleShipborne gravity estimation from the combination of inertial measurement unit(IMU) and global positioning system (GPS)en_US
dc.title結合慣性測量元件(IMU)與全球定位系統(GPS)估算船載重力值zh_TW
dc.typeThesis and Dissertationen_US
dc.date.paperformatopenaccess2016-08-31zh_TW
dc.date.openaccess2016-08-31-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextwith fulltext-
item.languageiso639-1zh_TW-
item.grantfulltextrestricted-
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