main rotor 中文意思是什麼
main rotor
解釋
水平旋翼-
In this paper, the rotating machinery at high speed is studied. there are discussed about numerical calculating methods for non - linear dynamical system, the rotor system radial impact and rubbing dynamics behavior analysis having the nonlinear rigidity on the unsteady and non - linear oil film, the rotor system dynamics behavior analysis with bending - torsional - pendular coupling vibrations, application of wavelet, fractal and network in fault diagnosis. the main works in this paper are as follows : ( 1 )
本文以高速旋轉機械為主要研究對象，系統、深入地研究了非線性動力學系統的數值計算方法、具有非線性剛度的轉子系統在非穩態非線性油膜力作用下的徑向碰摩動力學行為、轉子彎扭擺耦合振動的動力學分析、小波和分形理論及人工神經網路在故障診斷中的應用問題。 -
Helicopter is hard to hover precisely for its bad stability. ordinarily, it is improved by flight control system, such like rotorcraft unmanned aerial vehicles which use bell bar or bell - hiller stabilizer bar. bell stabilizer bar, fixed across with teetering main rotor, consists of a bar and masses at two ends
貝爾穩定桿由一桿與兩質量塊組成，它與貝爾直升機的蹺蹺板旋翼垂直交叉放置，這種旋翼裝置有助於加大角速度阻尼，改善貝爾直升機的穩定性，但同時也降低了操作性。 -
The smart rotor with active trailing edge is a new system for reducing the vibration which can adjust the air load of the blade to actively counteract the main harmonic of the force to the fuselage by controlling the deflection of the trailing edge
主動后緣附翼控制是一種較新的旋翼減振系統，它通過控制后緣附翼的偏轉，調節槳葉的氣動載荷，實現對機體激振力主要諧波分量的主動抵消。 -
For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions
針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。 -
The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。 -
However, the technology of manufacture about helical rotor is always the key problem, which blocks its development off since 1994, the cnc research center in shenyang university of technology has pursued research on complex special helical pole. it firstly put forward the non - instantaneous pole envelope method in china, and pursued systemic research on the theory of envelope method and nc programming method, then acquired a lot of achievements. therefore in this thesis the main job is the simulation model built on basis of non - instantaneous pole envelope method and the three - dimension graphic dynamic simulation system
從1994年起，沈陽工業大學數控研究中心即對復雜異形螺旋面加工進行攻關研究，在國內首先提出了無瞬心包絡加工方法，並對其包絡加工原理、數控編程方法等多方面進行了系統的研究並取得了一定成果，本文的主要工作即是以無瞬心包絡法加工過程為基礎建立的模擬加工模型和三維圖形動態模擬系統。 -
This is the second bifurcation of the rotor, leading to low frequency movement at about 1 / 6 rotary speed. ( 3 ) in the third part of the paper, we focus on how to establish a rotor model with multi. span and multi. disk including main linear and nonlinear stimulations on the rotors system. the rules for establishing this kind of rotors model are put forward at the beginning of this part
（ 3 ）提出了轉子大系統的理論建模準則，考慮非線性油膜力、聯軸節剛度及標高等因素的影響，建立了一個16dof兩跨四盤四支撐不平衡彈性轉子模型，並提出了大型汽輪發電機組全軸系的48dof理論模型，建立了考慮陀螺效應時的復數形式的非線性動力學模型。 -
Abstract : this paper briefly presents th e application of advanced brazing techniques for a larye number of assemblies of space vehicles, such as thrust chamber and turbine rotor of launch rock et engine, titanium tube of satellite, attitude control engine injector and wave guide component of satell ite, reflector, tube and honeycomb panel of manned spacecraft, main engine nozzl e and preburner of space shuttle as well as the pipeline systems of space statio n
文摘:簡略地介紹了先進釬焊技術在航天器部件，例如運載火箭發動機的推力室和渦輪轉子、人造衛星的鈦導管、姿控發動機噴注器和波導器件、載人飛船的反射器、導管和蜂窩壁板、航天飛機的主發動機噴管和預燃室以及空間站的管路系統等的廣泛應用情況。 -
Siemens is supplying a twin main drive with cylindrical - rotor synchronous motors, which, at 40 revolutions per minute, will produce a rated output of 8000 kilowatts and is designed for an overload of up to 275 percent
西門子提供一對帶有鼓形轉子同步電動機的主驅動，每分鐘40轉，將產生8000千瓦的額定輸出，適合超載量達275 % 。 -
But the variation of its aerodynamic forces will induce flapping motion and produce the cyclic pitch on the main rotor blades by the bell mixing mechanism. in order to study the effect of bell - hiller stabilizer bar on helicopter stability and control, this paper first analyze the function and the principles, give the flapping equation and a flight dynamic model with bell - hiller stabilizer bar. and then works over the stability and control of uav r - 50 in hover and cruise condition, and analyzed the influence from parameters of the bar to it
為了深入研究希勒伺服旋翼對直升機穩定性和操縱性的影響，本文首先分析了希勒伺服旋翼的功能和工作原理，推導了伺服旋翼的揮舞運動方程，建立了帶有希勒伺服旋翼直升機的飛行動力學模型，然後以yamahar - 50無人直升機為例，分析該直升機在懸停和前飛時的平衡、穩定性和操縱性，在此基礎上進一步研究希勒伺服旋翼設計參數變化對直升機穩定性和操縱性的影響。 -
Two main aspects are involved in the paper. firstly, by the research on the digital signal processing, the digital signal processing program of vibration fault analysis for rotor system is developed
本文主要進行了三方面工作:第一，對數字信號處理技術進行了研究，編制了轉子系統振動故障的數據分析程序模塊。 -
As a result of the heightening of mechanical operation speed and the application of new materials and new structures, the nonlinear dynamic behavior in rotating machines is becoming increasingly outstanding and important. nonlinear dynamic phenomena in rotating machines cant be described, explained and predicted by rotordynamics based on linear system theory. along with the deepening and permeating of nonlinear scientific research, the nonlinear vibration of rotor systems has become an attractive field in recent years. from a point of view to set up the distinct corresponding relations between vibration states and failures of rotating machines, main advances in the research of rotor nonlinear vibration are summarized, and typical nonlinear dynamic phenomena and their forming mechanism are also summed up in the paper. the aim of the paper is to enrich the diagnostic knowledge base of rotating machines. 55refs
由於機械運轉速度的不斷提高和新型材料、新型結構的推廣應用，旋轉機械的非線性動力學行為日顯突出和重要.基於線性系統原理的轉子動力學理論與方法難以對實踐中出現的豐富的非線性動力學現象作出準確的描述、闡釋和預測.近年來，隨著非線性科學研究的深入和滲透，轉子系統非線性振動已成為應用力學和機械工程領域的研究熱點之一.從有利於建立旋轉機械振動狀態集與故障集之間的映射關系出發，綜述了近年來轉子系統非線性振動研究的主要進展，總結了轉子系統中出現的典型非線性動力現象及其產生機理，目的在於豐富旋轉機械故障診斷知識庫.參55 -
The large machined main gear and standard 15 tooth pinion gear comprise the rotor head drive system on the synergy n9
大型機械齒輪、標準主要包括1915年牙杯頭插齒傳動系統的協同n9號 -
This system makes a breakthrough of traditional incremental motion control theories. it breaks the strict ambit between continuum and discrete, speed and position, rotation and step, the space vectors of stator magnetic field and rotor magnetic field are selected as the main control objects, incremental motion control and motion control are combined organically to make incremental motion control develop to large capability, high efficiency, high precision
這其中的交流步進控制理論打破了傳統的增量運動控制思想，打破了連續與離散，速度與位置，旋轉和步進的嚴格界限，以定、轉子磁場空間矢量為主要控制目標，將增量控制與運動控制有機的結合起來，使增量控制向大容量、高效率、高精度方向發展。 -
The study of flywheel battery concerns the intercross of many disciplines, such as mechanism, material, electronic engineering, heat engineering, computer, and so on. in this dissertation, two main key techniques, the high speed flywheel rotor and the magnetic bearing, are investigated deeply and systematically. the main contents of this dissertation are as following : in chapter 1, the background, source, purpose and significance of the subject are introduced
其研究涉及到機械、材料、電工、熱工、計算機等多學科的交叉，國內外目前大都在研究原型裝置，對設計理論與方法尚未進行系統深入的研究，本論文則對飛輪電池儲能涉及的兩大關鍵技術? ?飛輪轉子設計與磁浮軸承及其相關技術進行了系統的理論分析與模擬研究。 -
The observer makes use of motor parameters to estimate speed, but these parameters ( stator and rotor resistance, magnetizing inductance ) will vary because of the change of environmental temperature, iron loss and main flux saturation. so parameter variation will lead to the error of estimation, the purpose of this paper is to study the influence and the compensation of parameter variation
因為觀測器在估計轉速時利用的是電機的額定參數，而電機的參數（定子電阻、轉子電阻、勵磁電感）由於環境溫度的變化、鐵心損耗和主磁飽和的影響將發生變化，所以必然有估計誤差產生。 -
Main rotor blades were severed within the first few metres through contact with small trees and rocks, and the underbelly and right side of the fuselage were damaged substantially
主旋翼槳葉在直升機沖前首數公尺處因碰觸地面矮小樹叢和石塊而斷裂，機腹和右側嚴重損毀。 -
The left skid was substantially damaged. the main rotor blades remained intact but were bent and twisted
主旋翼槳葉被折彎和扭曲，但保持完整。 -
Examination of the wreckage trail indicated that substantial damage was inflicted on the aircraft, in particular the main rotor blades, within the first few metres after initial impact
墜機路線調查顯示，直升機尤其是主旋翼槳葉，在首次撞擊后的最初數公尺受損嚴重。 -
The chinese clones typically use cheap plastic for the main rotor hub, main blade grips, frames and other critical parts
中國復製品的典型是用廉價的塑膠做主要的轉軸轂，主漿夾片，框架和其他關鍵的部位。
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