航程精度 的英文怎麼說

中文拼音 [hángchéngjīngdù]
航程精度 英文
distance accuracy
  • 航 : Ⅰ名詞（船） boat; shipⅡ動詞（航行） navigate （by water or air）; sail
  • 程 : 名詞1 （規章; 法式） rule; regulation 2 （進度; 程序） order; procedure 3 （路途; 一段路） journe...
  • 精 : Ⅰ形容詞1 （經過提煉或挑選的） refined; picked; choice 2 （完美;最好） perfect; excellent 3 （細）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 航程 : air-range; sail; flying range; voyage; passage; range
  • 精度 : precision; accuracy; degree of accuracy; precision accuracy; trueness
  1. During the evaluation method for the precision of missile aiming on the sea, setting up test structure system, confirming demand coordinate, putting up installation and calibration to test frame of missile silo, in the course of navigating, it was analyzed and calculated the direction error that brought by the incorrectness of the position of longitude and latitude

    在海上瞄準精度鑒定方法中，建立了試驗構建體系，確定了必要的坐標系，對彈筒試驗支架進行了裝調、校正和實際標定。對艇在航行過程中，由於艇的經、緯度不準確而帶來的定位誤差的影響進行了分析與討論。
  2. It makes use of resource of the chip, realizes the development of every module, achieves distilling of telegraphese, builds up new frame, calculates the position and provides external interface. in the section of calculating the position, the author combines the two measures of carrier phase position and code position. finally, in the platform of matlab, the author completes the function simulation of main modules

    概述了接收機的設計原理;詳細描述了基於ti公司的tms320c6713dsp晶元的系統程序設計中各模塊的實現，利用該晶元的資源，實現各模塊的調度，完成對導航電文的提取，重新組幀，定位解算以及對外介面;在解算部分，把載波相位定位與碼測距定位相結合，利用載波相位對偽距的平滑來提高定位精度;在matlab平臺下進行了各模塊的功能模擬測試，以模擬結果的圖表來分析說明了載波相位平滑偽距的兩種演算法能使定位精度有一定的提高。
  3. 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。
  4. The research on autonomous navigation and orbital keeping technology of geosynchronous satellites : selecting position vector in the inertia space and longitude, latitude, radial errors in the hill equation as state variables, the precision of orbit determination caused by track dynamic model error, sampling period, and sensor measurement and install error is analyzed

    同步衛星自主導航與軌道保持技術研究：分別選取慣性空間位置矢量和採用hill方程表示的經、緯、向徑誤差作為狀態量，分析軌道動力學模型誤差、采樣周期以及敏感器測量、安裝等誤差對定軌精度的影響。
  5. A general stack equation of mobile robot based on analyzing the motion of planar motion object and the mathematical models of four different kinds of common wheels is developed, accordingly, the mobility of mobile robot is addressed and the forward and inverse solutions to speed for specific configuration driven by differential speed are derived. utilizing the muir and newman convention, the description of the posture transformation matrices between different coordinate frames and the solution for the speed of point located on these frames are introduced. according to posture estimation, a more accurate method, dead reckoning algorithm, is developed for a specified configuration characterized by differential speed motorization, and simulations of this algorithm and other traditional methods are carried out using matlab while traversing a circular path

    本文對兩輪差速驅動移動機器人的運動學及其本體緩沖設計進行了探討，在對平面運動物體運動分析的基礎上結合四種常用車輪的數學模型，推導出了一個通用的移動機器人堆積方程，在此基礎上分析了移動機器人的移動能力、並針對兩輪差速構型推導了速度正解與逆解；使用muir和newman的運動學建模方法，推導了移動機器人上點及連桿坐標系位姿、速度變換關系矩陣及求解方法；在移動機器人位姿識別方法中結合差速驅動構型對航位推演算法進行了分析：推導了一種理論精度較高的航位推算演算法，並使用matlab對其與傳統的推算演算法在跟蹤圓弧軌跡情況下進行了模擬；最後針對本文所研究的機器人給出了一種比較系統、可靠的緩沖結構設計思路，較好地解決了移動機器人作業過程中外界因素及本身設計中引入的各種不確定誤差問題；本論文研究成果已在本實驗室所開發的樣機上得到實現，經過應用與考核證明其中的分析與設計是切實可行的。
  6. The thesis analyse the error and the feasibility of the system. because the precision of position and direction is related with the precision of the heading and the distance, the thesis discuss the method of obtaining the distance using milemeter, water milemeten engine ' s rotate speed and accelerometer, and the method of obtaining the heading using the combination of the gyrocompass and the digital compass. then the thesis introduce the details of the system realization, include the hardware and the software

    由於航位推算的精度與航程和航向的精度直接相關，因此，論文討論了用里程計、水速表、引擎轉速或加速度計等獲取里程的方法，用航向保持器和數字磁羅盤組合的方法獲取航向角的方法（初始尋北由數字磁羅盤來完成） ，這為採用數據融合方法提高航程和航向精度打下了基礎。
  7. Verification regulation for the genaral accuracy of aerophotogrammetric instruments

    航測儀器整機精度檢定規程
  8. Abstract : the attitude error performance of electrostatic gyro should be understood and the relevant error equations must be set up in order to ensure the navigation precision of esgm. the relation between the navigation errors and the attitude errors of gyro was derived by use of spherical triangle. the simulation results show that the temporal performances of the longitudinal and distance errors which come from the initial alignment errors are periodically variational. they also show that the longitudinal and distance errors resulted from gyro drifts are not convergent in time. thus, the effects of initial alignment errors and gyro drifts can not be neglected and must be estimated and compensated

    文摘:為了保證靜電監控器的導航定位精度，需要了解靜電陀螺的姿態誤差特性，建立相應的誤差方程.本文採用球面三角形原理推導了導航定位誤差與陀螺姿態誤差的關系式.模擬結果表明，由初始定向誤差引起的經度誤差和距離誤差的時間特性是周期變化的；由陀螺漂移引起的經度誤差和距離誤差是隨時間發散的.因此，初始定向誤差和陀螺漂移的影響不能忽略，必須對其進行估計和補償
  9. In this application, the lorentz force generated by the interaction between the current in the wire and the geomagnetic field produces an electro - dynamic drag leading to a fast orbital decay. in this paper, we make an intensive study of the process of de - orbiting using electro - dynamic tether system. the concrete work includes : firstly, i have studied the basic principle of how to generate the electro - dynamic drag, modeled via accuracy geomagnetism, made a concrete analysis of the de - orbiting duration, the magnitude and direction of electro - dynamic drag under the action of the dipole and accurate geomagnetic models, set up a counterbalance between electro - dynamic torque and gravity gradient torque, emulate the de - orbiting process of spacecraft, and compared the change of six orbital factors and the de - orbiting duration under the action of the dipole and accurate geomagnetic models

    本文對基於電動力纜繩的航天器離軌過程進行了深入研究，具體工作如下:首先，本文研究了電動力纜繩產生電動力拉力的基本原理，建立了精確地磁場模型;分別在偶極子模型和精確地磁場模型作用下，對電動力拉力的大小、方向、離軌時間及電動力纜繩傾角的大小進行了計算分析;建立了電動力力矩與纜繩系統重力梯度力矩的平衡關系;分析了電動力力矩為系統提供能量的原理;最後分別在偶極子地磁場模型和精確地磁場模型作用下，對受電動力纜繩作用的航天器的離軌過程進行模擬，分析了在不同精度地磁場模型下，航天器離軌過程中各軌道參數的變化情況，並比較了不同模型對離軌時間的影響。
  10. Abstract : approximate methods for calculating aerodynamic heating rates on space shuttles are discussed. various methods are given for predicting the heating rate at axisymmetric stagnation points, general three dimensional stagnationpoints and the leading edge stagnation point of wings. numerous laminar and turbulent heating techniques for flat plates and cones are analyzed and compared. a brief review of some methods is presented to predict heating rate for winward centerline and lateral direction off the symmetry plane. the results show that the methods are simpler and can guarantee enought precision for predicting aerodynamic heating environment of space shuttles

    文摘:介紹了國內外預測航天飛機氣動加熱的工程計算方法.給出了軸對稱、非軸對稱和機翼前緣等各種外形駐點熱流密度的計算，分析和比較了平板、錐體的層流和湍流熱流密度計算的各種方法，概述了航天飛機迎風面中心線和離開中心線橫向熱流密度的計算.計算結果表明，本文方法用在航天飛機氣動熱環境初步設計中比較簡單並且有足夠精度
  11. Recently, according to the requirements of some important gps research subjects in the fields of geodesy, geophysics, space - physics and navigation in china, we studied systematically how to correcting the effects of the ionosphere on gps, with high - precision and accuracy

    根據當前大地測量、地球物理、空間物理和導航等領域的科學研究和工程應用中的若干重要gps科研項目的需要，近年來，我們系統研究了電離層延遲的高精度模擬和改正方法。
  12. About the large deformation description, a multi - floating coordinate system is adopted. it can effectively reduce the error of discretization. this paper deals with the design of restrained variable structure control in the way of phase plane analyse, which is concise and avoids complex mathematical descriptions. a new method is promoted for flexible spacecraft control by describing flexible spacecraft dynamics equations as t - s fuzzy model and designing a pdc fuzzy controller

    將撓性航天器姿態動力學方程描述為t - s模糊模型為撓性航天器控制提供了新思路;模擬結果表明，基於t - s模型的pdc模糊控制器能滿足撓性航天器大角度姿態機動的精度要求，並能有效抑制帆板振動，具有一定的智能性。
  13. Abstract : this paper introduced the all process of urban 1 : 500 scale aerophotogrammetry. technical measures in production are put forward. work precision in every phase is analysed on statistics

    文摘:論述了城市1 : 500比例尺航空攝影測量的全過程，結合生產實際提出了做好這一工作的技術措施，對各階段的作業精度進行了統計分析。
  14. As the traditional navigation system ca n ' t satisfy the requirements of the autonomous underwater vehicles ( auv ) navigation and position. we study a depthometer - doppler - aided strapdown inertial navigation system ( ddsins ) in combination of the developments of periodic navigation technique and some practical problem posed by the mathematical and variation of output data of doppler, furthermore, the digital simulation and semiphysica test are made to verify the validity of the algorithm, the main research work are as follows : design of the strapdown inertial navigation system of auv

    由於傳統的導航系統很難滿足遠程水下航行器精確導航、定位的要求，本文在充分考慮使用特殊性的情況下，結合國內、外導航技術發展的實際狀況和發展方向，研究了水下航行器組合導航系統的誤差，重點解決了因多普勒輸出數據周期長和周期時變而給導航計算和濾波器設計帶來的問題，並進行了模擬和實物測試，模擬和實物測試結果表明本文所研究的設計方案合理，可以達到某型水下航行器導航、定位需要的精度。
  15. Measuring velocity precision is very important. in this thesis, the author researches on the location precision of doppler velocity log and compass, the precision of velocity precision of doppler velocity log

    本論文就是針對這兩方面而做的，主要圍繞著輔助導航系統的定位精度和如何減小多普勒計程儀的測速誤差進行的。
  16. In order to inprove the tracking performances of some sensors and local nodes, the paper discusses the state estimation techniques in multilevel multisensor surveillance systems with feedback information. based on the single sensor kalman fitering equations with feedback information, this paper presents two - level centralized, distributed and hybrid track level fusion methods with feedback information in multicoordinate systems. in the different cartesian coordinates, several kinds of track level fusion methods with feedback information for three - level multisensor data fusion systems are proposed, in which centralized - distributed, distrbuted - distributed and hybrid - distributed estimation combination problems with feedback information are considered, and proves that two kinds of three - level estimation solutions with or without feedback information are optimal and equivalent in the form of the theorem. the simulation results show that the multilevel multisensor data fusion system can not only increase the global estimation acuracy of target but also greatly improve the tracking perfomances of some sensors and local nodes by using the feedback information

    為了改善局部節點和傳感器級的跟蹤性能，本文研究帶反饋信息的多級式多傳感器系統中的狀態估計技術.在給出有反饋信息情況下傳感器級狀態估計解的基礎上，本文提出多坐標系中有反饋信息的兩層集中、分佈和混合估計方程.在不同笛卡爾坐標系中，本文提出了幾種帶反饋信息的三層多傳感器系統中的航跡級融合方法，其中包括集-分估計、分-分估計和混-分估計，並以定理的形式證明有、無反饋信息情況下的兩類三層狀態估計是價的、最優的.模擬結果表明，在多傳感器信息融合系統中引入反饋機制可以明顯改善一些局部節點和傳感器級的跟蹤精度
  17. And in allusion to the shortcomings on the fitting of noises by least square, a new procedure is presented to modify the estimations of model parameter of the noise. it can control the effects of the correlation noise of except for first order self - correlation noise. using the model the error of gps / ins integrated navigation system is estimated

    再次，針對卡爾曼濾波方程的前提條件不滿足而影響導航系統的精度的問題，應用時間序列分析理論提出了一種改進的噪聲模型參數估計演算法，對此演算法進行建模，模擬結果表明，該演算法能有效的控制一階自相關特性以外的噪聲對參數模型估計的影響，提高卡爾曼濾波精度。
  18. The research is already brought into a type of project, and it has important significance in improving precision of airplane navigation system and capabilities of flight control system and firepower control system

    該項研究已納入國家某工程型號任務之中，對提高飛機導航系統精度及飛控與火控系統性能有重要意義。
  19. In order to solve this problem about high precision positioning for underwater submarine, this paper proposes a relatively practical scheme

    為了解決潛艇在水下長時間航行過程中的高精度定位問題，本論文提出了一種比較實用的解決方案。
  20. Use the magnetic vector for the observation information, the paper estimate the location and rate of the satellite, analysis of simulation results and the sources of error. to further enhance navigation accuracy, the paper study the unscented kalman filter, compare with the extend kalman filter. in the same initial conditions of the extend kalman filter, we do the simulation

    其次，基於磁環境模擬系統的測量數據，本文研究了擴展卡爾曼濾波演算法，建立了衛星的運動學和動力學方程，以地磁場矢量為觀測信息，對衛星位置速度進行了估計，並分析了模擬結果及誤差來源，為了進一步提高導航精度，本文又研究了unscented卡爾曼濾波演算法，給出了原理及步驟，並與擴展卡爾曼濾波進行了比較分析。
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