矢量原點 的英文怎麼說
中文拼音 [shǐliángyuándiǎn]
矢量原點
英文
origin of vector-
In the process of solving, poles are obtained from recurrent formula, modal vector are obtained from superposition formula not residuary. decoupled equation is derived when vibration source is part correlation, severely coupling appears in the process of input and output then frequency response function cannot directly get according to method mentioned above, decoupling is first problem
當輸入完全相關時，頻響函數無解，可繞過頻響函數，直接運用線性系統的迭加原理來求響應，極點由遞歸公式得出，模態矢量由疊加公式求出，而不是由留數求得的相應的公式。Through consulting lots of relevant references, present research of direct drive volume control hydraulic servo system is summarized in this paper, the principle and character of this system are expatiated, the principle of vector control is introduced. at the same time, the mathematical model of ac asynchronous motor is set up based on the vector control theory. the mathematical models of both the pump controlled motor and pump controlled cylinder are set up and simulated in this paper
在查閱大量國內外相關文獻的基礎上，本文綜述了國內外對該系統研究概況，闡述了該類系統原理和特點;闡述了矢量控制的基本原理，並基於這一原理建立交流異步電動機的數學模型;分別建立了泵控馬達系統和泵控缸系統的數學模型，並給出了模擬分析;設計了用於泵控馬達系統的集成閥塊，加工了密閉壓力油罐;針對現有直驅式電液伺服裝置所存在的問題，本文主要針對系統工作過程中所產生的噪音與爬行問題進行了一定的研究。The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced
論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況，在回顧電梯液壓控制系統節能技術的基礎上，介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理，分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式；詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計，重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容；最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。Conditions of normal mode realization are deduced and optimized model with the multivariate mode indicator function as the target function is built. through solving the maximal eigenvalue problem, the original shaker force vector of appropriation is reached. then the realization approach of the optimal shaker force vector based on single shape principle is proposed and at the same time the automatization of normal mode appropriation is realized
對于模態物理分離技術的多點正弦激振純模態試驗技術，尋求其最佳激振力矢量是最為關鍵的環節，本文先推導出純模態實現的條件，建立以多變量模態指示函數為目標函數的優化模型，通過求解最大特徵值問題，得出適調純模態的初始激振力矢量，再提出以單純形原理為基礎的最佳激振力矢量的實現方法，同時也實現了純模態適調過程的自動化。According to the characteristic of ann itself and the complexity of factors which influence the elevation, the paper analyses the influence aspects of ann. on the promise of bridge construction precision, the paper raise determining principle and method for neural network ' s import vector in bridge construction process
根據神經網路自身的特點，以及橋梁立模標高影響因素的復雜性，對神經網路影響因素進行分析，在滿足橋梁施工精度的前提下，提出了在實橋施工過程中神經網路輸入矢量的確定原則和方法。In paper, reaching the aim, firstly, we have researched thorough about symbol recognition and theory understanding relative theory and technology, and basing on those theory and technology, we adopt the based global characteristic symbol recognition and engineering drawing understanding algorithm which can automatic convert the vectorgraph which doesn ’ t include the relative physical information into the vectorgraph which includes the relative physical information. secondly, researching about the 2d computer animation technology and combine the cbt system, we have presented the new path animation model which include the union path description, animation pattern and time - velocity and time ? distance parts
為達到上述目標，本文首先對目前圖形符號識別技術進行系統的、較深入的分析，結合民航飛機原理圖特點採用基於全局特徵的符號識別演算法對原理圖進行符號處理，並以此為基礎改進了基於圖的方法和全局知識的語義分析方法相結合的原理圖理解演算法，可將無序的矢量圖轉化成高層的知識表示，為動畫製作提供素材，為后續的電路完整性檢測及動畫自動播放提供相應的知識支持。This paper expatiated that the mathematics models of ac motor is higher order, non - linear and closed coupling, multivariable input - output system. and introduces the principle and the algorithm of sine pulse width modulation ( spwm ), opened - loop space voltage pulse width modulation control ( svpwm ) and field oriented control ( foc ). finally, realized the control strategies of variable - frequency speed regulating using assembly and c language
文中闡述了交流異步電機的數學模型是高階、非線性、強耦合的多變量輸入輸出系統，介紹了交流電機的正弦脈寬調制、開環電壓空間矢量的u / f控制和磁場定向控制的原理及控制演算法，並利用dsp構成控制系統，通過匯編語言和16位定點c語言混合編程的方法實現了上述的變頻調速控制策略。In chapter 4, we discuss the method of vos abstraction based on temporal segmentation in detail. first we put forward affine modal, which is a kind of 3 - d motion modal of rigid body, compensate global motion vector based on this modal, and get the changed detection mask ( cdm ). then we introduce the conception of optical flow field, compute the local
首先構建三維剛體運動的模型，提出一種計算模型的全局運動矢量的方法，並進行全局運動補償、變化檢測模板提取和連通域標記等步驟，然後引入光流場的概念，並介紹其計算原理和方法，用horn - schunck迭代法計算圖像中各點的局部運動矢量，並據此對變化檢測模板的結果進一步提取，獲得時域上分割的信息。V ) based on cbr ( cased - based reasoning ) principle and characteristic of garment structure graphics design - strong experience - oriented, this paper selects cbr as the basic theory of intelligent subsystem, which creatively combines point - grading, vectorgraph method, theory of fuzzy reasoning and bezier curve algorithm together and devise case reuse and revise algorithm
（ 5 ）在基於實例推理（ cbr ）原理及服裝結構圖形設計特點?強經驗性的基礎上，選用cbr為基於autocad的服裝結構圖形設計子系統的解決方案。創造性的將點位移及矢量法膜糊推理原理和bezier曲線演算法相結合，設計了實例重用和實例修正演算法。Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。Based on the analysis of image wavelet transformation and the space / frequency distributing characteristics of different subbands " coefficients, this dissertation fully exploits the following theories and methods : scalar quantization, vector quantization, trellis coded quantization, trellis coded vector quantization, vector classification, codebook expansion and weighted mean square error rule basing mankind visual characteristics, etc. from different angles of information amalgamation, it develops several innovative algorithms of image compression and coding, gives their realization schemes, and makes plentiful simulation tests
本文在分析了圖像小波變換的原理和子帶系數空間及頻率分佈特點的基礎上，充分利用標量量化、矢量量化、網格編碼量化、網格編碼矢量量化、矢量分類、碼書擴展和基於人眼視覺特性的加權均方誤差準則等思想和方法，從信息融合的不同角度展開了對小波圖像的壓縮編碼研究，同時也討論了這些方法在靜止圖像量化中的具體應用。To solve the problem, researches on the theory of refine rolling mill cycloconverter - feed synchronous motor vector control system are carried out, while the characteristic of this system are analyzed and the model of air - gap flux orientation control system of synchronous motor is set up
針對這種情況，本文對精軋機交-交變頻同步機矢量控制系統運行原理進行了研究，分析該矢量控制系統的特點，建立了氣隙磁場定向控制的交-交變頻同步電機矢量控制系統的模型。This dissertation firstly introduces the fundamental elements and modulation methods of three - phase ac - ac mc. then mainly analyzes modulation process of mc with dual space vector modulation ( dsvm ) and gains the mathematic relations between inputs and outputs
本文首先介紹了三相交交矩陣變換器的基本原理和調制方法，並重點分析了採用雙空間矢量調制策略矩陣變換器的調制過程，得出了輸入輸出量之間的數學關系。Secondly, based on the defects of the uptodate balancing machine which were employed in the motorcycle manufacture plants, this dissertation has presented a new method on the means of checking unbalance mass of the motorcycle single - cylinder engine crank - connecting rod mechanism. it has adopted the hard - bearing balancing machine as the prototype, utilized tow group of resistance sensors placed in vertical direction with one another to pick up the information which stand for the inertial force of the motor engine crank set when it is running
其次，通過對當前國內外曲柄連桿機構動平衡試驗的現狀及其存在問題的分析研究，提出了一種新的測試方法：在工作原理上採用硬支承型測力式動平衡機，在測量方法上應用互成90的兩點測量來矢量合成任意一點旋轉慣性力大小及方向，這也是其不同於以往試驗機的最大之處。The simulation results of a hvdc light system based on vsvpwm and pid controller verify the feasibility of vsvpwm and pid controller to hvdc light systems. the power flow model of hvdc light system is also proposed, and a power flow calculation program incorporating with hvdc light is developed, based on psasp / upi. the epri 7 - bus test system is applied to test the proposed model and algorithm, and the results prove it feasible and correctness
本文分析了用於vsc控制的電壓空間矢量脈寬調制（ vsvpwm ）的基本原理，提出了基於pscad / emtdc軟體的vsvpwm模擬方法；建立了hvdclight系統的穩態模型，並結合該模型確定了控制量與被控量的合理對應關系，設計了適用於hvdclight系統的pid控制器；通過對採用vsvpwm和pid控制器的hvdclight系統的數字模擬研究，驗證了vsvpwm和pid控制器應用於hvdclight系統的可行性；建立了hvdclight系統潮流計算的數學模型，利用psasp軟體及其用戶程序介面功能開發了含hvdclight的電力系統潮流計算程序，並結合epri7節點測試系統的算例分析，證明了該模型及其實現方法的可行性和正確性。Compared to piv technology, dpiv technology has the advantages of faster processing and smaller errors. so we made a detailed research of dpiv technology, which mostly includes the principle of velocity mesurement of dpiv, digital image processing, the correction of velocity vectors, the construction of flow field and so on
與piv技術相比， dpiv技術具有處理速度快、計算誤差小等優點，因此本文詳細研究了dpiv技術，主要包括dpiv的測速原理、數字圖像的處理、速度矢量的校正以及速度場的重建等。In this paper, the concepts, the historical background, the importance and current application of scientific computing and visualization of scientific computing are introduced and the visualization of computational detonation mechanics is specially expounded. based on the sumarization of the visualization software visc2d and visc3d directing at the mmic ( multi _ material in cell ), the key point of the improvement and the research contents are listed. based on the basic visualization reference model and the data file format of mmic, the file format of vector data is defined. the 2 - d data field visualization technology is described in detail. include the visualization of scalar field and vector field. the weak points of the visc2d software is overcome, and we propose the full - frame coloring mapping method and the visualization of the vector data using the clic ( coloring _ noise line integral convolution ). in addition, the method to draw and display shock wave by edge probing operator is introduced. in the design of the program, in order to overcome the shortcoming of visc2d with sdi ( single document interface ), the software vsv ( visualization of scalar and vector ) with mdi ( multi document interface ) is designed. compared with visc2d, the advantage of vsv includes : ( l ) vsv is a mdi applied software which can be used to view various kind of data, ( 2 ) vsv resolves the flash during displaying moving images which are produed by full - frame coloring method used to the visualization of scalar fields, and ( 3 ) vsv can be used to visualize vector field such as velocity. at last, the visualization of the output data from mmic in explosion and shock is realized by vsv
首先簡要介紹了科學計算與科學計算可視化的概念、歷史背景、意義及應用現狀，重點說明了計算爆炸力學中的可視化問題，在總結多流體網格程序mmic的可視化軟體visc2d和visc3d的基礎上提出了改進要點和本文的研究內容。在介紹可視化基本參考模型和mmic程序的數據文件結構的基礎上，給出了矢量數據文件的結構，詳細闡述了二維數據場的可視化技術，包括標量場和矢量場的可視化，針對原visc2d軟體的不足，給出了改進方法，提出了全幀著色映射方法和用於矢量數據可視化的基於噪聲著色的線積分卷積方法，以及提出了利用邊緣檢測運算元提取和顯示沖擊波的方法。在程序設計上，針對原visc2d軟體只適用於單文檔窗口的缺點，本文利用多文檔mdi窗口，研製了標量場與矢量場的可視化軟體vsv （ visualizationofscalarandvector ） 。From the basic principle of the double - fed machine the paper analyses the character of the speed system. by the vector control and the coordinate transformation, we present the mathematical model on the synchronous coordinate
從雙饋電機的基本工作原理出發，分析雙饋電機調速的特點，引入矢量控制技術，進行坐標變換，得出雙饋電機同步坐標繫上的數學模型。It gives three effective coding schemes, firstly it reviews the fundamental theory of vector quantization and its current algorithms, then it analyzes and summarizes characteristics of wavelet image quantization with vq
首先回顧了矢量量化的基本原理和一般演算法，對小波變換結合矢量量化技術的特點作出分析和總結。As the kernel of software, the algorithm is another emphasis of the paper ' s works. based on the principle of relaying working, after comparing the effect between the algorithm of instantaneous sampling and the algorithm of vector, the virtue of short data windows and precision action was stood out. and the choice of algorithm with three sampling data was for the reason of short data windows
演算法理論作為微機保護的軟體核心也是本文的討論重點，以保護的動作原理為基礎，認真研究了采樣瞬時值法與一般的矢量值法的效果比較，突出了采樣瞬時值法時間窗短、動作準確的優點；而針對低電壓閉鎖所採用的三采樣值積演算法也正是出於時間窗較短，便於配合保護動作的考慮。分享友人