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 航迹计算
 track calculation
 Track Calculation Based on Ellipsoidal Model of the Earth 基于地球椭球体模型的航迹计算 短句来源 Through studying on the conception of the middle latitude,this paper gives a set of accurate formulas of middle latitude and track calculation based on the ellipsoidal model of the earth,and provides a theoretical model for the development of accurate automatic navigation. 通过对中分纬度概念的深入研究，给出一套地球椭球体上中分纬度（ ）和航迹计算的精确算式，进而给出其解算的工程数模，为高精度船舶自动化导航的发展提供理论模型。 短句来源
 sailings
 Owing to the increasing popularization of computers innavigation,it is not only necessary but also feasible to conduct sailings with these formulae. 由于计算机在航海上的日趋普及，使应用这些公式进行航迹计算不仅是必要的，而且是可行的。 短句来源 The sailings are terms to describe mathematic method of solving problems relating to ship's sailing, different method gives result of different accuracy and is for different condition. 航迹计算是利用数学公式解算船舶航行中航向、航程与船舶位置的关系问题 ,不同的方法适用的条件不同 ,精度也不一样 . 短句来源
 “航迹计算”译为未确定词的双语例句
 Calculation and Analysis of Take off Track of Certain Aircraft 某型飞机起飞航迹计算与分析 短句来源 On the Improving of the Calculation Accuracy in Midsplit-Latitude Method 提高中分纬度法航迹计算精度的方法 短句来源 The result shows that the calculation data of the take off track of the given quality and the airport condition are basically in accordance with the testing take off result. It indicates that the model is reasonable, the method is correct and the data are precise. 结果表明 ,得到了给定起飞质量和机场条件的起飞航迹计算数据 ,它与试飞结果基本吻合 ,说明模型合理、解法正确、数据准确 短句来源 The article takes a careful study on calculation model and method of the take off track on the basis of certain aircraft. It also uses the results derived from the model and method to compare with the results of the flight test of a certain airport. 结合某型飞机详细地研究了起飞航迹计算的模型与方法 ,并对利用本文的模型和方法得出的结果与到某机场试飞测试数据的结果进行对比分析研究。 短句来源 A study to improve middle latitude sailing 关于航迹计算中分纬度求经差法的研究 短句来源 更多
 相似匹配句对
 We also give a new correction factor to simplify the calculation of the Unstatistic. 的计算。 短句来源 Track Calculation Based on Ellipsoidal Model of the Earth 基于地球椭球体模型的航迹计算 短句来源 CALCULATION OF FLIGHT TRACE AND PREDICTION OF LANDING POSITION FOR SCIENTIFIC BALLQON 高空气球的航迹计算及落点预报 短句来源 CALCULATION OF CAPACITANCE 电容的计算 短句来源 DIGITAL COMPUTATION FOR FLIGHT TRACK ORIENTATION 航迹定位数字化 短句来源

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 sailings
 A policy that is currently in place for coastal passenger ships in Greece is to ban sailings in case of very adverse weather conditions. Regular sailings carried civilian and military personnel back and forth between Britain and India. This means that sailings must occur on time, even if the ship sails with less than a full load of cargo. The Olympic sailings will be held in the sea, just outside the Qingdao. There are at least four sailings a week from Penzance to the Isles of Scilly. 更多
 A new algorithm-optimal control algorithm of terrain following(TF)system was presented by Funk, J. E. and Kelly, R. T. in 1975.This algorithm is used to design the desired flight path(DFP)with cubic spline from the sampled data of terrain contour, then the aircraft is forced to fly along this path by corresponding optimal controller. Since then, increasing attention has been paid to it, furthermore, it has been applied to terrain following/terrain avoidance system.Because this algorthm uses cubic spline to design... A new algorithm-optimal control algorithm of terrain following(TF)system was presented by Funk, J. E. and Kelly, R. T. in 1975.This algorithm is used to design the desired flight path(DFP)with cubic spline from the sampled data of terrain contour, then the aircraft is forced to fly along this path by corresponding optimal controller. Since then, increasing attention has been paid to it, furthermore, it has been applied to terrain following/terrain avoidance system.Because this algorthm uses cubic spline to design DFP, it is difficult to consider constraint conditions, such as the normal acceleration limit & nd the flight trace angle limit of vehicle. Consequently, it needs long computation time, then can not satisfy the requirement of real tim e calculation.This paper presents a method of designing DFP with circular arc spline. Under forty terrain conditions, This method is compared with the DFP of cubic spline and proven to be feasible.This new method decreases needed computation time, thus making real time calculation possible. 从地形外形的采样数据设计飞机贴地飞行的期望航迹,然后由相应的最优控制器使飞机按此航迹飞行,这一地形跟随技术中的最优控制算法,日益得到重视和发展,并应用在综合地形跟随/回避技术中。 本文提出了采用圆弧样条计算期望航迹的方法,在几十种地形情况下进行了对比研究,证明是可行的。明显地减少了期望航迹计算的工作量,增加了系统实时计算的可能性。 A numerical method to obtain a complete solution of the dynamic response of a variable sweep wing aircraft in the course of changing the angle of sweep is presented in this paper. Both aerodynamic and trajectory computation are included. 本文提出了一套完整的变后掠飞机在变后掠过程中从气动力直至航迹计算的动态响应的数值求解方法。在气动力计算中,使用有限基本解方法分别计算了飞机在变后掠过程中的准定常气动力和非定常气动力;在推导飞行力学方程时,使用变组或结构的质点系动力学建立了一组完整的体轴系方程。本文的最大特点是采用“时间历程法”紧密地进行气动力和飞机响应量的交义求解,从而得到飞机在整个变后掠过程中的所有气动力和飞行力学参数。使用本文提出的方法,可圆满地分析和研究飞机作变后掠飞行的全过程和变后掠各因数对飞机响应量的影响。本文最后给出了算例和响应分析,这些结果,对研究变后掠飞机的飞行稳定性、机动性和低空变后掠的安全性是十分有用的。 A numerical method to obtain a complete solution of the dynamic response of a variable sweep wing aircraft in the course of changing the angle of sweep is presented in this paper.Both aerodynamic and trajectory computation are included. During the flight of sweptback angle variation, the aerodynamic forces acting on the aircraft are unsteady obviously, the methods of computing these forces and accompanying response of aircraft are also presented. 本文提出了一套完整的变后掠飞机在变后掠过程中从气动力直至航迹计算的数值求解方法。飞机在变后掠以及伴随变后掠而产生的动态响应过程中,飞机承受的气动力显然是非定常的,本文提出了这种非定常气动力的计算方法以及计及非定常气动力时飞机动态响应的计算方法。 << 更多相关文摘
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