航線誤差 的英文怎麼說

中文拼音 [hángxiànwùchā]
航線誤差 英文
course error
  • 航 : Ⅰ名詞（船） boat; shipⅡ動詞（航行） navigate （by water or air）; sail
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 誤 : Ⅰ名詞（錯誤） mistake; error Ⅱ動詞1 （弄錯） mistake; misunderstand 2 （耽誤） miss 3 （使受損害...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 航線 : air line; air route; route; airway; shipping line; way; itinerary; azimuth; pathway; trajectory; ...
  • 誤差 : error
  1. 2. according to the characteristic of airborne gravity survey, several statistic variables are derived from theory of probability and mathematical statistics combined with knowledge of errors principles. these statistic variables are applie to the significance test of systematic errors in every surveying line

    2 、根據概率論和數理統計的理論與方法及誤差理論，結合航空重力測量的特點，建立了有關檢驗統計量，並將其應用於航空重力測量測線系統誤差的顯著性檢驗。
  2. In this paper, the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error, the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range, and is very expensive. 2 ) two important approaches in geophysical navigation techniques are summarized, one is terrain contour based navigation, this approach is investigated keystone today ; the other is image based navigation, due to no perfect image sensors and image seabed map, this approach has seldom been practised. 3 ) two important terrain contour based navigation algorithms has been applied to auv, one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )

    主要研究內容包括：一、總結分析了當前水下導航的常用方法和不足之處，指出基於航位推算的導航方法，存在著最大的問題就是導航誤差的積累問題，如果沒有修正系統，這種方法很難滿足使用要求；其次指出基於聲學的導航方法，造價昂貴，導航范圍有限，難以滿足自主水下航行器大范圍導航的需求；二、總結了當前水下地形輔助導航的主要技術路線，一是基於地形高程的匹配方法，這是當前研究的重點；二是基於地形圖像的匹配方法，由於缺乏良好的圖像傳感器，和可用的海底圖像地圖，目前這種方法還有待研究發展；三、將兩種地形高程匹配的常用方法應用到自主水下航行器上：以相關演算法為前提的地形輪廓匹配（ tercom ）方法和以卡爾曼濾波為基礎的桑迪亞慣性地形輔助導航（ sitan ）方法，前者演算法簡單可靠，但是導航精度不高，後者雖然精度比較高，但存在著演算法較為復雜、有可能發散和出現奇異值等問題。
  3. The first algorithm is low precise but simple and credible, the second is high precise but complex and incredible. 4 ) developed four kinds of methods aimed to improve precision and credibility of navigation system. the first is parallel sandia inertia terrain - aided navigation ( psitan ) ; the second is tercom + sitan, it can restrain two important disadvantages of sitan ; the third is particle filter - based terrain - aided navigation ( pftan ), the particle filter can reduce the error of navigation ; the last is tercom + pftan, where tercom is looked as monitor to ensure the credibility of navigation system

    採用并行sitan方法來提高導航精度，並克服奇異值問題；提出了tercom + sitan方法，綜合利用兩者的優點，在保持sitan導航精度的前提下，有效地克服了sitan的兩個缺點；提出了一種基於連續蒙特卡洛濾波（常被稱為particlefilter ）的地形匹配演算法（ pftan ） ，有效地克服了利用sitan時由於地形隨機線性化帶來的誤差，使導航精度有較大的提高；提出了tercom作為監視器的地形輔助導航思想，並將其應用到連續蒙特卡洛方法上，較大地增加了系統的可靠性和精度。
  4. Thirdly, an ideal satellite orbit is simulated, and on this foundation, we establish some typical simulation and testing circumstances. lastly, after simulation in the simulation and testing circumstances, we compare the performance of ukf and ekf. and then, based on the outdoor experiment of the vehicle, an analysis and contrast between our simulation results and commercial data process software is carried out, and the conclusion is obtained

    首先在第三章提出的目標運動模型的基礎上建立了系統狀態方程;其次簡要分析了衛星導航系統中的各類誤差，建立了基於偽距觀測量的系統觀測模型;第四節利用yuma格式歷書數據模擬了未受攝動影響的衛星軌道，並在此基礎上建立了幾種典型的動態模擬測試環境;第五節為模擬分析和比較，先對ukf演算法和ekf演算法在動態模擬測試環境中進行了模擬比較，然後針對外場試驗，對非線性濾波獲得的定位結果與商業軟體進行了分析比較，並得出結論。
  5. The improvements in the iaga contained adding strengthen operator, improving evaluation index of premature, etc. multi - phase homing project, making use of the flight properties of parafoil system in gliding and turning, was simple in control and facile in practice. based on frenet frame, the linear time - variable error equations of parafoil system were built

    基於frenet坐標系推導和建立了翼傘系統線性時不變的誤差方程，並運用「投影點」的思想來獲得frenet坐標系下偏差量的解析近似表達式，從而設計了用於翼傘系統航跡跟蹤的傳統pd控制器和增益調節型模糊pd控制器。
  6. Based on an analysis of the sources of errors in airborne gravity measurements, an error model is studied to constructed mathematically which can characterize the change of systematic errors, with which the network adjustment is carried out and the model parameters are determined simultaneously. and finally, the compensation of systematic errors is realized

    航空重力測量測線網平差就是在分析、總結航空重力測量的主要誤差源基礎上，研究建立反映航空重力觀測系統誤差變化規律的誤差模型，根據交叉點不符值條件，平差求解各測線上重力觀測值系統誤差改正數，然後對各測線上所有重力觀測值進行改正（補償） 。
  7. Two practical applications prove their efficiency. 3. using knowledge of adjustment with additional systematic parameters, based on an analysis of the sources of errors in airborne gravity measurements, an error model is studied to constructed mathematically which can characterize the change of systematic errors and with which three kinds of new crossover adjustment models are presented

    3 、根據附加系統參數平差的理論，在分析、總結航空重力測量的主要誤差源基礎上，研究建立了反映航空重力測量系統誤差變化規律的誤差模型，並根據三種不同的情況建立了相應的測線網平差模型。
  8. ( 3 ) on the basis of kalman filer algorithm and on the premise of two assumptions, namely, state estimation error of each sensor is dependent or independent, kalman filter weight fusion algorithm and modified track - to - track fusion algorithm are proposed, then improved algorithm is applied to the simulation of line - guidance and terminal - self guidance of torpedo

    （ 3 ）基於卡爾曼濾波演算法，在各傳感器估計誤差相互獨立和不獨立兩種假設的前提下，給出了卡爾曼濾波加權融合演算法，在此基礎上，提出了修正的track - to - track航跡融合演算法，並將改進后的演算法應用於魚雷線導加末自導系統的模擬研究。
  9. Motion errors are given first, and then theoretical analysis, simulation result show affections caused by 3 kinds of typical motion errors both on the doppler and the image. last the phase error criterions are given. 4

    4 .研究了機載雙站sar中偏航、俯仰和橫滾三種姿態誤差對回波多普勒頻率和雷達成像的影響，並分析研究了天線指向誤差對回波幅度的影響，最後通過模擬實驗證明了研究的正確性。
  10. In light of the character of the dins, a damped network was based on the traditional design of damping equalizers for the vertical errors, and the relation between a various of errors and the new level damped system was analyzed, and the navigation information of dins was combined

    在借鑒傳統水平阻尼網路的基礎上，針對雙慣導系統的特性設計了新的阻尼網路，並分析了其誤差源與雙慣導阻尼網路的關系，對雙慣導系統的導航參數進行線性組合輸出。
  11. The same conclusion as derived from the original pda under approximate condition is concluded this way without any approximations. the second method is the instant - state performance prediction based on the hyca method. this method not only gives the off - line recursive error variance relation, but also gets a series of performance measurement such as track life

    然後應用兩種方法對其進行性能估計和預測，一是基於riccati方程的穩態性能估計，其結果與pda演算法近似條件下得出的結論相同；二是基於hyca方法的瞬態性能預測，不僅給出了誤差方差的離線遞推關系，而且得到了航跡壽命等一系列性能指標的估計值。
  12. Based on multisensor target tracking system, the research of this thesis focuses on target location technique, target trajectory smoothing, filter, prediction based on a parameterized model, target tracking with nonlinear measurement, outlier detection and distributed systematic error estimate based on real - time data fusion and so on

    論文以多傳感器目標跟蹤系統為背景，針對目標定位測速技術、基於參數建模技術的目標航跡平滑、濾波和外推、非線性測量系統的目標跟蹤、基於實時數據融合模型的野值剔除和分散式系統誤差估計等方面進行了深入研究。
  13. The thesis develops new techniques on the basis of the relating documents - - construct of reduced 2 - d indexed layered guide star database. the database is a uniform storage reduced guide star database with improved 2 - d index it divides guide stars to local bright star ( lbs ) and local dim star ( lds ), and gives priority to lbs in making star triangle to reduce the number of stored triangles. it uses 2 - d na index and linear storage to improve the hit the target rate, save the memory for index

    精簡二維索引分層導航星庫，作為一種統一存儲的精簡、索引導航星庫，採用星的分層方法精簡導航星庫，以局域亮星為主構造導航星三角形，減少了星三角形的數量，節約了存儲空間；採用索引方法檢索導航星三角形，提高了命中效率，節約了搜索時間；採用n劃分和線性存儲的方法精簡索引，提高了二維索引的存儲效率；採用索引的邊緣擴充方法，可以在一定程度上減少位置誤差的影響。
  14. After the instrument error of sins is analyzed, it can be concluded that the quadratic model is more sensible to navigation error, and with instrument error taken into account, the linear model is better than the quadratic model

    通過捷聯慣導儀器誤差的分析，發現二次模型對捷聯慣導導航參數誤差更為敏感，考慮慣導儀器誤差后，線性模型的修正效果要優於二次模型。
  15. Shiphandling simulator is a device that can partly imitate the true environment at sea ， and is specially designed to satisfy marine education and trains and maritime research etc. one of its key techniques is to create the virtual environment at sea ， and the terrain is its important component. according to the needs of the real time visual display of the shiphandling simulator ， this paper analyses the requirements of the geometry precision of the important islands and background hills which are within the ships ' visible scope ， and brings forward the modeling methods of the hill ' s pileup and the hill ' s silhouette edges based on contour lines. it also presents the definition of error that the hill ' s silhouette edges graph has been given and the effective scope of application ， and firstly established the error criterion of terrain model that is built in shiphandling simulator. with these two kinds of method ， the size of data storage can be minimized greatly ， and the requirements of high update rate and geometry precision for the real time visual display of the shiphandling simulator can be satisfied

    船舶操縱模擬器是一種能夠部分模仿海上真實情況，專門為滿足航海教育與培訓、航海技術研究等目的而設計研製的裝置，其核心技術之一是海上視景模擬，而地形地貌是海上視景中的重要組成部分.根據船舶操縱模擬器實時視景顯示的需要，在分析航行船舶對可視范圍內重要島嶼與背景山脈的幾何精度要求的基礎上，提出了基於等高線的山形堆積建模和山形輪廓建模方法，並給出了山形輪廓圖形的誤差定義、有效適用范圍，以及船舶操縱模擬器中地形建模的誤差準則，該方法生成圖形的數據量較小，其圖形更新速率與幾何精度能達到船舶操縱模擬器實時視景顯示的要求
  16. Such structure can be described with strict feedback system. motivated by vehicle cruise control, this paper investigates nonlinear robust control of strict feedback system and presents a lyapunov - based design method : dynamic surface control and proves the exponent stability and arbitrary small bounded tracking error of the closed loop system

    本文在汽車巡航控制應用背景下，討論了嚴格反饋非線性系統的魯棒控制問題，給出構造性的非線性控制器設計方法： dsc （ dynamicalsurfacecontrol ）魯棒控制器，並對閉環系統穩定性進行了分析，證明了調節問題的指數穩定性和任意有界誤差跟蹤性能。
  17. Finally, based on the observability analysis and error analysis, two autonomous navigation schemes for encounter phase are respectively proposed in detail. monte carlo simulations are done for the two schemes. by analyzing and comparing the simulation results, we can get the conclusion that, under the accuracy conditions provided by the instruments in existence, the position estimation accuracy for probe encountering object celestial body is 0. 42km and 0. 04km, which demonstrate the feasibility of the two navigation schemes

    最後，在可觀性分析和誤差分析的基礎上，分別給出基於圖像測量的自主導航方法和基於視線方向及夾角測量的自主導航方法，並對這兩種方法進行蒙特卡羅數值模擬，通過對模擬結果的分析和比較，在現有儀器的測量精度下，探測器在與目標天體交會時刻的位置估計精度分別是0 . 42km和0 . 04km ，由此表明兩種自主導航方案都是可行的。
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