攝動系數 的英文怎麼說

中文拼音 [shèdòngxìshǔ]
攝動系數 英文
perturbation coefficient
  • 攝 : Ⅰ動詞1 （吸取） absorb; assimilate2 （攝影） take a photograph of; shoot 3 [書面語] （保養） cons...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Second, it presents the project design of an astronauts ’ kinetic measurement system that can precisely measure the forces and moments of key points on motorial person. it presents a principle and flow of the project design of an astronauts ’ kinetic measurement system. and it particularly discusses the demarcate of camera system, the gathering and storage of experiment pictures, pick - up of the symbol data, the parameter calculating method of target movement, and the general design of assistant equipment

    然後給出航天員作用力測量實驗系統的設計方案，該系統能夠克服重力影響，較精確地得出運動時人體各關鍵點產生的力和力矩;給出了航天員運動參數測量實驗系統的原理及流程，並詳細論述了攝像系統標定，實驗圖像的採集與存儲，標志點數據的提取及目標運動參數解算的方法;給出了輔助設備的概要設計。
  2. In the positioning servo - system, which generally is configured by the d. c. pulse width modulator ( pwm ) velocity governing system and position servo - loop, the parameter perturbance of pwm velocity loop really exist by reason of such as the load behavior ; power voltage supply ; operating setting value, etc. 1, 2 ， and it cannot be ignored. by using the identification technique to form the mathematical model of the system, authors have confirmed the facts. therefore, to design the discrete sliding mode controller ( dsmc ) of the positioning servo - system, the perturbed parameters value bounds of the pwm velocity loop, which is as the controlled plant of position servo - loop, should be accounted. consequently, the design principle of dsmc for accounting system with parameter perturbance is proposed by the authors. the proposed method can ensure the stability of system with parameter perturbance and the behavior of non - overshoot, fast precise positioning. in order to reveal the effects of the design method, the comparative research work is done by the authors. also, it has been tested in an industrial experiment, the results proved it is satisfactory

    由直流脈寬調速系統（ pwm ）和位置環構成的定位系統中，速度環的參數隨負載特性；電網電壓；給定工況而攝動是不容忽視的.作者通過系統辨識建模也證實了這一事實1 ， 2 .因此在設計位置環的離散滑模控制時，必須針對速度環（即位置環的控制對象）的參數攝動范圍採用「對象參數攝動離散滑模控制器的設計方法」 ，以確保系統在參數攝動時的穩定性和快速、無超調、準確定位的優良動態品質.為剖析該設計方法的控制效果，本文作了對比性研究，並將該設計方法用於工業試驗中，取得了滿意的結果
  3. In these years, image measuring has been used in every walk of life gradually. this paper discusses the characteristic, the virtue and the application of digital image measuring. in this paper. after analyzing the practical situation and theory, it has confirmed the project that identify automatically the pointer and the reticle of the pressure gauge with technique of optic photographic system, image process and automatic identification

    近年來，圖像測量逐漸應用到各行各業。本文討論了數字圖像測量的特點、優點及應用范圍，結合實際情況和理論分析，確定了利用光學攝像系統和圖像處理、識別技術，自動識別壓力表的指針和刻線的方案，解決了壓力表示值的自動檢定問題，研製了一套集計算機、圖像處理和識別、自動控制和光學等技術於一體的壓力表示值的自動檢定系統。
  4. Thirdly, an ideal satellite orbit is simulated, and on this foundation, we establish some typical simulation and testing circumstances. lastly, after simulation in the simulation and testing circumstances, we compare the performance of ukf and ekf. and then, based on the outdoor experiment of the vehicle, an analysis and contrast between our simulation results and commercial data process software is carried out, and the conclusion is obtained

    首先在第三章提出的目標運動模型的基礎上建立了系統狀態方程;其次簡要分析了衛星導航系統中的各類誤差，建立了基於偽距觀測量的系統觀測模型;第四節利用yuma格式歷書數據模擬了未受攝動影響的衛星軌道，並在此基礎上建立了幾種典型的動態模擬測試環境;第五節為模擬分析和比較，先對ukf演算法和ekf演算法在動態模擬測試環境中進行了模擬比較，然後針對外場試驗，對非線性濾波獲得的定位結果與商業軟體進行了分析比較，並得出結論。
  5. Based on the normal form obtained above, a global perturbation method is utilized to give the analysis for the global bifurcations and chaotic dynamics of the rotor - ambs system. the global bifurcations analysis indicates that there exist the heteroclinic bifurcations and the silnikov - type homoclinic orbit in the averaged equations

    利用全局攝動法研究了電磁軸承-轉子系統的全局分叉和混沌動力學，利用數值模擬方法分別對平均方程和原方程進行了分析，得到了的描述系統混沌運動的相圖和波形圖，從而驗證了理論結果的正確性。
  6. Considering that electromechanical actuator ( ema ) has the feature of being sensitive to the parameter perturbation and load disturbance, being poor in rigidity etc., deep research has been done to the principle and design method of the ema control system by using the robust control theories

    針對電動舵機存在的易受參數攝動及負載擾動影響、剛度較差的特點，採用魯棒控制理論，對電動舵機控制系統設計理論及方法進行了深入研究。
  7. Focusing on the performance evaluating and the design of tripropellant injector, adopting the cold test rig with background pressure supply, malvem particle analyzer, ccd photography system, tripropellant hot test - bed, numerical simulation software and auxiliary theoretical a nalysis, the d ischarge c haracteristic a s w ell a s a tomization p erformance o f the injector and the combustion performance as well as the mode - transition characteristic of thrust chamber are studied detailedly based on the 3 different structures of coaxial tripropellant injector, large numbers of important conclusions are gained

    本文圍繞三組元噴嘴的性能評定及設計方法。採用反壓冷試臺、馬爾文測粒儀、 ccd高速攝影系統、三組元發動機熱態試驗臺、數值模擬程序及輔助理論分析等多種技術手段和研究方法，對三種結構的同軸式三組元噴嘴深入進行了噴嘴流量特性和霧化特性、推力室燃燒性能和轉工況性能研究，得到了大量重要結果。
  8. Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed

    本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。
  9. Simultaneously with the micro - displacement started the processe of the grating sensor measuring the displacement and image collection of the system. the grating sensor ( length gauge ) measures the displacement of the dial gauge with surveying rod. it is delivered to the computer with a block k220 in real time and the dial image by ccd camcorder is shown on the computer screen with the image collection card in real time

    在實現微量進給的同時，啟動系統的光柵位移測量過程和圖像採集過程，光柵傳感器（長度計）測得指示表測桿的位移量，由計數卡ik220實時傳送給計算機，由ccd攝像頭攝取的表盤圖像經圖像採集卡在計算機屏幕上得以實時顯示，最後通過對指示表指針位移計算處理與光柵傳感器測量的位移量進行比較，得到指示表受檢點的示值誤差。
  10. Secondly, the effectiveness and limitation of the classical perturbation, such as the method of multiple scales and the poincare - lindstedt method, are discussed in detail through a duffing oscillator with delayed velocity feedback. it is shown that the two perturbation methods are effective only in solving the approximate solution of the first two orders. an ambiguity or paradox will be encountered when they are used to seeking for the third or higher order approximation of solution

    其次，以一具有時滯速度反饋的duffing系統為例，研究了經典攝動法如多尺度法， poincar - lindstedt法等在求解時滯微分方程級數解時的適用性和局限性問題，指出利用這些方法只能有效求得系統的前兩階近似解，而在求系統的三次以上近似解時會出現矛盾或二義性。
  11. Anechoic coatings " efficiency is getted from its front and back many layer ' s transfer loss compared. first, absorptive characteristic of homogeneous material is analyzed thoroughly. then wkb perturbation means are used to calculate absorption coefficient of the impedance transition structure in this paper

    本論文首先對均勻材料的吸聲特性做了深入的分析，並詳細討論了wkb微擾攝動法，利用wkb方法計算阻抗過渡結構的吸聲系數。
  12. Based on the perturbation riccati transfer matrix method, the calculating program are developed. the program can be used to the perturbation analysis and the sensitivity analysis of the real and complex, the single and repeated eigenvalues and eigenvectors for lateral vibration of rod and beam structures, especially suitable to the perturbation analysis and the sensitivity analysis of eigenvalues and eigenvectors for rotordynamic systems ; 2. the perturbation riccati transfer matrix method was applied to identify the parameters of the rotor for a boiler supply pump, and the accurate dynamic model of the rotor was archived

    該程序可以對桿、梁結構橫向彎曲振動的實數、復數的孤立和重頻特徵值問題進行攝動分析和靈敏度分析，特別是適合於轉子動力學系統特徵值和特徵向量問題的攝動分析和靈敏度分析； 2 、用攝動riccati傳遞矩陣方法解決了某電站鍋爐給水泵轉子的參數識別及動力模型修改的問題，並給出了該種型號的給水泵轉子的更準確的力學模型，為進一步的轉子動力學分析與設計奠定了可靠基礎； 3 、給出了攝動理論在相關領域如隨機特徵值分析、隨機振動響應分析、可靠性分析、靈敏度分析、優化設計以及參數識別中的應用公式。
  13. The resulting control systems are robust and reliable in that guaranteed stability and performance were provided not only for any admissible parameter perturbation, but also in case of control - channel outages

    該方法能夠保證對于給定范圍內的任意參數攝動和控制通道失效，受控系統都是內部穩定且滿足指定的性能指標。
  14. In this chapter, the stability judgements are proposed for the sps in four conditions respectively. they can offer the upper bound of the dead - time and the perturbed parameter. an application example shows that the judgements are easy to use

    本章通過對一類奇異攝動時滯不確定系統的研究，給出了該類系統在四種情況下出現參數范數有界攝動時保證系統穩定的時滯t和奇異攝動參數。
  15. Sometimes, we can not choose a proper lyapunov function that satifies theory ' s conditions, but we can consider its perturbed systems and can use sevsral lyapunov functions to study the systems

    有時，我們不能選取到一個恰當的lyapunov函數滿足定理的條件來直接判斷系統的穩定性，但是，我們可以考慮其攝動系統以及採用多個lyapunov函數來解決問題
  16. In this case, we give the formulajs to calculate first - to third - - order perturbation coefficients of the eigenva1ues and eigenvectors

    在這種情形下，我們給出了計算特徵值和特徵向量1到3階攝動系數的計算公式。
  17. In this case, we give the formulas to caiculate first - to third - order perturbation coefficients of the eigenvalues and first - to second - order perturbation coefficients of the eigenvectors. 1n second case where the eigenprobiem for the first - order perturbation coefficients of a defective eigenvalue hajs repeated eigenvalues, we give the formulas to calculate the first - to third - order perturbation coefficients of the eigenvalues and first order perturbation coefficients of the eigenvectors. the third case is an extension of the first case, where one of the first - order perturbation coefficients of the eigenvalues associated with the lowest - order jordan blocks is zero

    第一種情形是特徵值一階攝動系數都不相同，在這種情形下，我們給出了計算特徵值1到3階攝動系數以及計算特徵向量1到2階攝動系數的計算公式；第二種情形是特徵值一階攝動系數有相等的情形，在這種情形下，我們給出了計算特徵值1到3階攝動系數以及計算特徵向量1階攝動系數的計算公式；第三種情形是第一種情形的擴展，此時對應于最低階jordan塊的特徵值一階攝動系數有一個是零。
  18. This paper get a result about practical stability of its perturbed systems and a result about its practical stability using several lyapunov functions

    本文又得到了脈沖混合微分系統的攝動系統的關于兩個測度的實際穩定性定理，給出了一個例子，並利用多個tapanunov函數得到了關于該系統的實際穩定性結果
  19. In section one, we study its practical stability using lyapunov ' s direct method and comparison method, we also get a result about practical stability of its perturbed systems and a result about practical stability using several lyapunov functions

    52j利用ly punov函數直接方法、比較方法和多個ly3punov函數研究了脈沖混合微分系統關于兩個測度的實際穩定性，還得到了一個關于其攝動系統的實際穩定性結果； 52
  20. The convergence of the solution of a linear singularly perturbed system in distribution topology as tends to zero is considered

    摘要討論了線性奇異攝動系統廣義狀態解當趨于零時在廣義函數空間上的收斂性問題。
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