航標變動 的英文怎麼說
中文拼音 [hángbiāobiàndòng]
航標變動
英文
alteration of mark-
Different from detecting space of land - based radar which has relative unchangabledetection space, aew radar ’ s detecting space changes with the carrier ' s patrol line. what ’ smore, because of both movements of carrier and targets, aew radar will detect targets whichwere out of its coverage
地基雷達的探測空間是相對固定的，而機載預警雷達的探測范圍隨載機航線的變化而變化;由於載機和目標同時都在運動，使得某一時刻在載機探測范圍之外的目標也可能在後來的飛行過程中被探測到。Using coordinate transformation method, the formula of imv on every point of image plane was deduced, and it included almost all motorial factors : the flight velocity of aircraft, roll, pitch, yaw, camera ' s scan and so on. thus, it is a precise formula, and it is also applied to frame cameras and push _ room cameras with array ccd
利用坐標系變換的方法可推出像面上各點的像移速度公式，該公式包含了幾乎所有的運動因素：飛機的前向飛行、飛機的姿態角變化、相機自身的擺掃運動等等，是精確的像移速度公式。本公式同樣適用於畫幅式航空相機和線陣ccd推掃型航空相機。The basis of dynamics and simulation includes the iterative flyout angle algorithm to the solutions to lambert problem and battin ' s universal conic section state extrapolate method. then spacecraft ' s orbit roots, maneuver impulse and maneuver time are discussed as the following four part : first of all, the chaser ' s one orbit roots is selected as a variable to simulate its influence to the large scale orbital maneuver. the research reveals fact that the orbit roots both of chaser and target should be close to each other to achieve better maneuver and rendezvous " ability, moreover, the best orbit maneuver and rendezvous occurs when both chaser and target ' s initial phase angle are equal
為了研究了交會機動中追蹤器和目標器的軌道根數、機動時限和機動能耗等因素對交會機動的影響，模擬和分析分為以下四個部分:首先，研究了追蹤器軌道單個參數為變量情況下兩航天器大范圍交會機動問題，研究表明，追蹤器的變化參量與目標器相應的參量在接近的情況下可以獲得良好的交會機動特性，而對于兩航天器軌道共面的情況下，初始相位角相等時則獲得最佳的機動效果。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。By means of the orbit dynamics theory and other knowledge, author established mathematical model related to collision forecast, including space object orbit confirming model, space objects relative movement model, dangerous object distinguishing model and space object collision geometry relation model, etc. according to the mathematic model, author calculated the relative distance transformation rule along with time between the spacecraft and dangerous debris and established early warning rule
依據航天動力學理論和其他知識，建立了碰撞預警相關的數學模型，包括空間目標軌道確定數學模型、空間物體相對運動數學模型、危險物體判定準則數學模型和空間物體碰撞幾何關系數學模型等，根據數學模型計算航天器和危險目標的相對距離隨時間變化規律，設定了預警規則。The second part studies optimal pure proportional navigation ( ppn ), with time - dependent gain of navigation to maneuvering target based on proportional navigation theory. optimal gain of navigation is constant for ppn without maneuvering ; based on this, solution of time - dependent gain of navigation is given by iteration approach, and the time required for capture is given, the times of iteration is decided by comparing this time with the iteration step
對目標機動的追逃問題，考慮導航增益可為任意實數，且隨時間和初始條件改變，這一思想是建立在目標非機動的純比例導引制導規律，最佳導航增益為常數的基礎之上，利用迭代的方法，給出了時變的導航增益的求解方法，並給出了實現捕獲所需的時間，用此時間與迭代步長進行比較，判定迭代次數。By showing the modern technique, such as bioengineering technology, electronic technology, space technology and so on, used and bringing about a series of changes to teh field of agriculture in our country, the article indicates the huge affection of the science and technology on the agriculture polia. having analysed the straits the science adn technology in our used agriculture and about the trends and ways of future development of agriculture policues, author puts forword some wiews following as : modernizting our agriculture, we must select the way of technuqe intensive ; our agriculture product must depend on the increse of producer ' s quality and the modern science and technology ; only by modern science and technology to reform traditional agriculture can we in the end realize agriculture modernization, so we must vigorously develop modern agriculture including the ecological agriculture taken as aim, the physical agriculture and biochemicl agriculture as means
本文通過展示生物工程技術、電子技術、航天技術等高科學技術在我國農業上的應用及其帶來一系列變化，揭示出科學技術在農業政策制定中的重大作用與深刻影響，分析了當前中國農業科學技術應用中面臨的困境及未來農業政策的方向和道路，提出了如下幾個觀點：要實現我國農業現代化，必須走技術集約的道路；我國農業生產必須轉移到依靠勞動者素質的提高和當代科學技術的基礎上來；我國的農業現代化最終只有通過高科技改造傳統農業才能實現，為此，必須大力發展以生態農業為目標、以物理農業和生化農業為手段的現代農業。Based on mark line recognition navigation, it becomes a main research direction because it has more merits than other visual navigation methods, such as easy setting up and changing of mark line, low technical cost and so on. meanwhile, it can quickly process the images and has a good performance of real - time control
標識線導航，由於引導路徑的設置和變更相對容易、技術成本和費用低，並且與其它視覺方法如三維視覺識別技術相比，圖像的處理速度快，控制實時性較好，因而成為自動引導車導航的一個主要發展方向。The problem is then fed to a nonlinear programming routine to solve for all parameters. the flight dynamics model with yawing motion of uh - 60a is given, scale factors of state variables and control variables are applied based on the consideration of algorithm convergence. then, the optimization of trajectories is expressed as optimal control problem with a performance index constrained by helicopter performance limits, faa regulation and so on
首先，建立帶偏航運動的直升機點質量模型，然後對狀態變量和控制變量進行無量綱處理，因為狀態變量和控制變量量值相差較大，這使得優化演算法收斂效果變差，所以需要選擇適當的縮放因子，最後把直升機單臺發動機停車后的飛行軌跡表示成一個最優控制問題，即在考慮直升機性能限制和far規范后，指定一個優化性能指標，選擇合適的路徑約束，然後再解最優控制問題。Cargo & parcel loading and unloading in flight turnaround ground service is a multi - object parallel machines job sorting problem with time window and job shift time, its time window often be changed due to various reasons, machines service time is uncertain
摘要航班過站服務中的貨郵裝卸作業調度是一類有時間窗和作業調整時間的多目標多設備并行作業動態排序問題，其特點是作業時間窗和服務作業時間動態變化。Green " s theorem is employed to find the quantity relationship among the constraints of heating rate, dynamic pressure and lift in reentry flight. the paper deduced the approximate solution of the optimal aeroassisted coplanar trajectories under the three typical constraints. the performance index to be minimized are either heat input, the total dynamic pressure, time during the atmospheric flight, the time integral of the square of the path inclination ; or maximize the time of flight during the atmospheric portion of the trajetory. an important conclusion is firstly obtained : under the three constraints above, the optimal aeroassisted coplanar transfers with the first forth kinds payoffs have the same optimal control laws
採用格林函數法，給出了同一平面氣動力輔助變軌飛行的3種過程約束（氣動加熱率、動壓、升力約束）條件之間關系的近似定量描述形成的飛行包絡線.由此求解了航天器同時受3種約束條件時，各種性能指標下的同一平面氣動力輔助變軌軌跡的近似解及相應的最優控制規律.文中對近似解與控制規律的內部結構作了細致的分析，得到了一些有益的結論With the development of spaceflight activity of human, surveillance of space target such as satellite and debris becomes very important
摘要隨看人類航天活動的增加，對于衛星和碎片等空間目標進行監視變得非常重要。Abstract : on the base of the traditional algorithms of the sun ' s orbit, an algorithm of the apparent motionof the sun ' s orbit for the marine simulator is given, and in order to realistically simulate the apparent mo - tion of the sun, a new method of the transformation of the coordinates is proposed
文摘:在傳統天文學的天體視運動軌跡計算方法的基礎上，給出一種在航海模擬器中應用的太陽視運動軌跡的計算方法，並且針對太陽在視運動當中高度變化的特點，提出了一種新的坐標變換方法，以逼真模擬太陽的視運動分享友人