俯仰變化 的英文怎麼說
中文拼音 [fǔyǎngbiànhuà]
俯仰變化
英文
pitching-
The complicated aerodynamics characteristic of spinning projectile with lateral jets and with attack angle is studied detailedly. the formation and changes are analyzed including magnus force, normal force, yawing moment, pitching moment and pressure center
系統分析了旋轉側噴彈丸復雜的空氣動力學特性，分析了馬格努斯力系數、法向力系數、偏航力矩系數、俯仰力矩系數和壓力中心等參數的產生機理和變化規律。In this dissertation, radar detection in hrr has been taken as background. the followings are main contents of this dissertation : ( 1 ) based on analyzing the targets and the clutter ’ s specific characteristics of hrr radar, the echo models of targets and clutter have been studied respectively ; the changes of targets ’ echoes in different elevation angles, azimuth angles and attitude angles have been analyzed ; then, the echo models of lfm radar clutter have been established
本文針對高距離分辨雷達目標檢測開展研究，主要完成了以下幾方面的工作: （ 1 ）分析了高距離分辨雷達目標和雜波回波特徵，在此基礎上分別研究了高距離分辨雷達目標和雜波的回波模型，分析了不同俯仰角、不同方位角以及不同姿態下目標回波模型的變化，並建立了線性調頻脈沖壓縮雷達的雜波模型。To solve the problems caused by the varieties of the missile dynamics with the difference of flight height, velocity and attitude angle in modeling the missile, in this thesis, the theory of variable structure model reference adaptive control is used to design a pitch channel autopilot based on a longitudinal missile model, the status equation using the measurable parameters of load and angular rate is established, and the methodology to choosing the reference model is discussed also, and the performance of the controller is analyzed by means of simulation
為了解決攔截彈氣動參數隨飛行高度、速度、姿態的不同，變化范圍大，控制系統難以準確建模的困難，基於縱向平面攔截彈模型，採用模型參考變結構控制理論設計了俯仰通道姿控復合控制系統，以可測量變量過載和角速度作為狀態量建立了系統的狀態方程，討論了參考模型的選擇方法，並對系統的性能作了模擬分析。In the following part, trajectory design and computation are given, including fight scheme and control & navigation laws. through the design and computation, the profile of attack angle, trajectory angle and pitch angle are designed. these works provide theoretical fundamentals for dynamics analysis and practical trajectory design
第三部分內容是對導彈的彈道進行設計與計算，給出導彈在各段的飛行方案或導引規律。設計出導彈在整個飛行過程中的質點彈道，迎角、彈道傾角和俯仰角等參量在導彈攻擊目標過程中的變化規律，為進一步的質點系彈道和動態分析提供理論基礎。Based on the mechanism of slipstream interaction, described in this thesis is firstly the interaction of the propeller slipstream with the wing 、 fuselage and horizontal tail. subsequently, the changes in lift 、 drag and pitching moment are derived, giving an engineering model for the prediction of the increments in the aerodynamic characteristics caused by the interference between the propeller slipstream and the other parts of aircraft. this method offers a powerful means to the calculation of the aerodynamic interaction between the propeller and the aircraft, providing reliable data for the design of and aerodynamic calculation on propeller - powered aircraft
本文以滑流干擾的機理為出發點，研究了螺旋槳滑流與飛機機翼、機身、平尾組合體之間的相互影響，推導出滑流引起的飛機升力、阻力和俯仰力矩的變化，給出了滑流干擾對機體氣動特性影響的工程估算方法，為研究螺旋槳與飛機部件之間的相互干擾提供了有力的工具，為以螺旋槳發動機為動力的飛機的設計和氣動計算提供可靠的依據。This paper, in advantage of modern control theories, designed the pitch control system and the altitude holding system of the x armed helicopter, and present digital simulation, coupling analysis, sensitivity analysis, system performance analysis under different input and initial condition
本文應用現代控制理論設計了某型武裝直升機的俯仰角控制系統和高度保持系統，並進行了數字模擬、耦合分析、飛行狀態變化對控制系統性能的影響分析，及在不同輸入初始條件下的系統性能分析。A variable pitching moment is provided by moving the elevator.
俯仰力矩的變化由升降舵的偏轉來提供。Their weights vary with the velocity of the platform and the requirements of the precision and the data - rate of the ins or gps are very high at the beginning the distribution of the space - time spectrum of the clutter is studied
一方面，主瓣雜波的帶寬和斜率隨著掃描方位角的變化而變化；另一方面雜波的二維分佈隨著距離或俯仰角的變化而變化。分享友人