空載變速 的英文怎麼說

中文拼音 [kōngzǎibiànsù]
空載變速 英文
no load speed changing
  • 空 : 空Ⅰ形容詞（不包含什麼; 裏面沒有東西或沒有內容; 不切實際的） empty; hollow; void Ⅱ名詞1 （天空） s...
  • 載 : 載Ⅰ名詞（年） year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 空載 : carrying idler; idler; idling; no live load; empty load; no load; non load; weight empty空載變速 ...
  1. Sicp / al matrix composites, with 5, 15 and 25 % volume fraction of sic particles, were prepared by vacuum hot - pressing sintering processing in this paper. based on mechanics properties, sem observation and energy dispersive x - ray analysis, the interface reaction phenomenon of sicp / al composites made by vacuum hot - pressing sintering, as well as the reinforcement and fracture mechanisms of this composite were analyzed. the dynamic responses of sipc / al composites were studied by a split hopkinson high - speed pressure bar impact system which strain rate was from quasistatic state strain rate ( 3. 3 10 - 3s - 1 ) to dynamic state strain rate ( 5. 2 103 s - 1 )

    本研究以武裝直升飛機防護裝甲材料為研究對象，採用真空熱壓粉末冶金燒結工藝制備了含sic顆粒體積分數分別為5 、 15和25的sic顆粒增強鋁基復合材料，結合其力學性能、掃描電鏡和界面微區能譜分析結果，分析了sic _ p al復合材料的真空燒結過程中的界面現象，以及材料增強和斷裂機理，並利用hopkinson高速壓桿沖擊實驗系統對其從靜態到動態（應變率為3 . 3 10 ~ （ - 3 ） s ~ （ - 1 ） 5 . 2 10 ~ 3s ~ （ - 1 ） ）的壓縮破壞響應進行了研究，分析了不同體積分數sic _ p al復合材料高應變率壓縮載荷下，材料的變形和微觀損傷機理，以及利用高速沖擊空氣炮測定了改復合材料制備剃度復合板的穿透性能。
  2. Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. the subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows : ( 1 ) considering the effects of the finite length of primary core, one - dimension analytical solution for the air gap field is cited in this paper. based on it, the single layer winding magnetic field is studied. considering whole - pitched and short - pitched winding configuration with odd poles and half - fulled slots in both ends, the double - layer winding magnetic field is analyzed, respectively

    本文對大圓環直線感應電機進行了深入細致研究，內容包括： （ 1 ）本文採用有限長行波面電流作用於有限長鐵芯上的模型，引用了氣隙磁場一維解，研究了單層繞組磁場，奇數極半填槽雙層繞組在採用整距和短距時磁場的分析、比較，簡單介紹了二維解； （ 2 ）用有限元軟體ansoft對大圓環直線感應電機空載氣隙磁場進行了靜態分析，並分析了結果； （ 3 ）用軟體進行了額定電壓下的瞬態分析，得到了轉矩，位移，轉速隨時間變化曲線圖，利用單極性霍爾元件測定轉速並與軟體計算結果進行了比較，採用等效電路法計算了堵轉時的最大電磁力並做實驗進行了驗證，由實驗測得了三相電流波形，並與計算結果進行了比較，對其不對稱性進行了定性分析。
  3. 2. dynamics analysis : by setting up jacon matrix differential coefficient sport is passed to descartes space. it makes terminal executing manipulator produce differential coefficient of acceleration and force in every different coordinates can be got. then the effective inertia, coincident inertia and gravity load of two manipulators are calculated by lagrange method. so generalized joint torque of each joint is got, and along with equivalent driving torque, actual driving torque of each joint can be worked out. 3

    動力學分析：建立雅可比矩陣將關節空間的各關節的微分運動傳遞到笛卡爾空間，使末端執行器位姿產生微分運動，以用於求加速度及力在不同坐標系間的線性變換，再用拉格朗日法計算兩機械手的有效慣量、偶合慣量、重力載荷，從而計算得到各關節的廣義關節力矩，並與等效驅動力矩共同算得各關節的驅動力矩。
  4. Using the traits of arc adjust itself of the co _ 2 welding, adopting slow - descending feature or even feature of electrical source equipping with system that delivering the welding rod at the invariable speed, then, the arc burning steadily is realized, and the quality of welding is improved

    利用co _ 2氣體保護焊電弧的自身調節特性，採用緩降或平硬特性的電源配等速送絲系統，通過改變電源空載電壓來調節電弧電壓，再利用電弧電壓和熔化速度之間的關系調節焊絲熔化速度使之等於送絲速度，最終實現電弧的穩定燃燒。
  5. The experiments show that ultrasonic motors can operate under vacuum condition, but the performance is different from that under general condition, its unloaded speed decreases significantly, while the stall - torque increases a bit

    試驗結果表明，超聲電機可以在真空環境下工作，但性能較常態環境下有所變化，其空載轉速明顯下降，堵轉力矩有所增大。
  6. Airborne gravimetry is a new kind of technique for surveying the gravity acceleration over the earth ' s surface and is advanced in gravimetry history, which basing on aircraft, including gravimeter, gps, altimeter and attitude sensor etc.

    航空重力測量是一種新型的重力測量技術，它以飛機為載體，綜合應用重力傳感器、 gps 、高度傳感器、姿態傳感器等設備測定近地空間重力加速度。航空重力測量是重力測量的一次歷史性變革。
  7. The main contents of this paper are following. ( 1 ) the mechanical models of ball bearings are set up by both the quasi - dynamic method and the finite element method in this paper, and then the load distribution of ball bearings is studied. the rules of the contact angle, the deformation, the stiffness and the limit rotational speed in different structure parameters and load parameters are analyzed

    本文圍繞航空發動機高速滾動軸承的力學特性，開展了以下工作: （ 1 ）分別採用擬動力學法和有限元法，建立了滾動軸承力學分析模型，研究了滾動軸承的載荷分佈特性，分析了不同結構參數和載荷參數對其接觸角、變形、接觸剛度和極限轉速的影響規律。
  8. Secondly, to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing. the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator. thirdly, it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow. the author constructed reliable and integrated experimental system and did a series of experimental study including no - load, cutting - in network and power generation at, below and above the synchronous speed

    論文首先分析了風機運行特性及其最佳風能利用原理，通過模擬及實驗驗證了採用直流電機的輸出特性模擬風力機的最大輸出功率曲線的可行性，並給出了模擬系統的硬體結構；然後為了實現交流勵磁發電機有功、無功功率獨立調節機理，分析了交流勵磁雙饋發電機的數學模型和在追蹤最大風能捕獲變速恆頻風力發電時必需的定子磁鏈定向矢量控制策略；針對雙饋發電機轉子能量雙向流動的要求，提出並設計了具有能量雙向流動能力的雙pwm交流勵磁用變頻器；最後為實現從理論到實踐的全面研究，研製出了一套小功率完整的雙pwm變頻器交流勵磁的雙饋風力發電機實驗系統，進行了空載、並網、同步速及上、下的發電運行等一系列的運行實驗；所完成的模擬和實驗研究均驗證了理論、模型和控制策略的正確性、可行性。
  9. With the computer controlling the output of the digital signals and the analog signals, controls and adjusts startup, stop, turn and rotational rapidity of the transducer - electromotor and the strength of brake actuator ; installs the torque sensor on dynamical axis, and installs the encoder on non - dynamical axis of the dimensional globoidal indexing cam mechanism ; utilizes the virtual instrument language labview development the test and control system, with the computer real - time monitoring, late displays and storages the data of the test, and processes the data and analyses it

    利用計算機控制數字量輸出和模擬量輸出來達到控制和調節變頻電機啟停、轉向、轉速;控制制動器的啟停和加載力;在弧面分度凸輪的加載軸和空軸上安裝扭矩傳感器和編碼器;應用虛擬儀器語言labview開發試驗臺的測控軟體系統，用計算機進行實時監測與事後顯示與存儲，並進行信號處理與分析。
  10. Prototype of the symmetrical typical voltage space - vector of open - loop variable frequency speed system is designed by using the tms320f240 digital controller and the ipm ( intelligent power model ), with which had a exam on the motor and the experimental results are also given. from the results we can conclude that the results are according with the theory analysis

    利用ipm智能功率模塊，設計了採用基於tms320f240數字控制器的對稱空間電壓矢量的開環變頻調速系統的原理樣機，對電機進行了空載實驗，給出了它們的實驗結果，實驗結果和理論分析相一致。
  11. It is difficult to replicate hinge moment accurately and rapidly because surplus torque affect dynamic performances of load simulator system badly with large intensity and continuous variation derived from variable velocity of rudder system

    這種干擾作用具有強度大、隨舵機速度不同連續變化的特點，它的存在嚴重影響了負載模擬器的動態性能，使得加載系統難以準確、快速地復現空氣動力鉸鏈力矩。
  12. After the discussion of the numerical simulation method based on the fdtd method and the pml technique, the motions of the charges and the electrical field lines were first employed to describe the radiation procedures of the pulse electromagnetic waves. then the causes of how the charges are accelerated and how the motion status of the charges are maintained were further studied from the angle of interaction of charge and field. after these analyses, it was pointed out that the pulse radiation is due to the suddenly occurred time - varying electrical field ( displacement current ) in the open space. this view was further evidenced by two examples : one is the partly resistance loaded antenna, the other is the partly curved antenna. the radiation procedures of the pulse electromagnetic waves of many different situations were simulated throughout this paper with the contours and waveforms of electric field given. these figures are very helpful to the understanding of the radiation mechanism of the pulse electromagnetic waves

    在討論了基於時域有限差分法和完全匹配層技術的數值模擬方法之後，首先從運動電荷和電力線的角度直觀地描述了脈沖電磁波的輻射過程，然後進一步從場與電荷相互作用的角度分析了天線上電荷是如何被加速以及如何維持其運動狀態的，指出了開放空間中突然出現的時變電場（位移電流）是脈沖電磁波輻射的根本原因.文中還對局部電阻加載的天線和局部彎曲的天線進行了研究，以進一步說明上述觀點.對多種情況下的脈沖輻射過程進行了數值模擬，並給出了電場的等高線和空間波形圖，這些圖形對理解脈沖電磁波的輻射機理非常有益
  13. In the holds of these aircraft, high - value goods, perhaps products of cooperative partnerships and synergies between u. s. and hong kong firms, would be transported to speed - and service - minded customers around the globe. similarly, air cargo firms could put together creative flight combinations that respond to rapidly shifting production sources and markets while maximizing efficiency and profitability

    這些飛機將高價值產品，可能是美港合作的結果，運載到世界各地求好求快的客戶手中。同樣地，航空貨運公司在提高效益和利潤的同時，推出更有創意的服務，回應快速轉變的生產源地和市場。
  14. The results were as followed : pollen germination and tube growth were decreased in ga mutant, and increased in ga overexpression strains as compared to wild type, while pollen germination and tube growth were not affected in gp mutant

    結果表明：體外實驗中gpa1突變體花粉的萌發率及花粉管生長速率均低於野生型花粉，而超表達g花粉的萌發率及花粉管生長速率則高於野生型及空載體對照； g突變體agb1 - 1與野生型花粉的萌發率及花粉管生長速率差異不大。
  15. Besides the routine characteristics, xs series worm gear units adopts the helical gear - worm wheel type to make the structure more reasonable. the series not only has higher transmission efficiency and loading capability than those of single - stage worm wheel transmission, but also reduces space. moreover, under the close volume, the series can obtain higher transmission ratio and is more favorable for equipment setting

    Xs系列蝸輪蝸桿減速機除具有常規特性外，該機還採用了斜-蝸輪形式，使結構更加合理化，它不僅改變了比單級蝸輪蝸桿傳動具有更高的傳動效率和承載能力，而且在結構布局上縮小了空間佔地面積，同時在相近體積條件下，能獲得更大傳動比，更有利於設備的配置，該機能與各種減變速機組合，滿足不同的使用要求。
  16. Analysis of a great many data shows that some strong earthquake will arouse seismogenic zone loading and bring the increase of stress, accelerate accumulation of nonlinear strain of medium. it will make the earthquake source rupture of high stress status in unsteadiness in advance, which resulting the proceeding earthquake occur in advance

    表明：某次強震活動可以引起某些孕震區的加載，介質非線性應變積累加速，使處于高應力狀態的震源失穩提前進入不穩定狀態，后續強震提前發生，即強震之間存在著時間、空間上的關聯性。
  17. Sliding mode control during variable speed constant frequency doubly - fed wind generator no - load connecting electric grid

    變速恆頻雙饋風力發電機空載並網滑模控制
  18. The results show that in the later stage of the nucleation process, the maximum slip velocity is monotonically accelerating ; the slipping hot spot ( where the slip rate is maximum ) migrates spontaneously from a certain instant, and such migration is spatially continuous ; when the maximum velocity reaches a detectable order of magnitude ( at least one order of magnitude greater than the loading rate ), the remaining time is 20 hours or more, and the temporal variation of slip velocity beyond this point may be used as a precursory indicator ; the average slip velocity is related to the remaining time by a log - log linear relation, which means that a similar relation between rate of microseismicity and remaining time may also exist ; when normal stress variation is taken into account, time scale of such processes can be extended by about 2 times

    結果表明，在成核的後期階段：最大位移速率單調加速增加；滑動熱點（最大滑動速率處）在後期階段開始自發性遷移，且在空間上連續；當最大滑動速率達到可以明顯探測的量級時（高於載入速率一個數量級以上） ，倒計時間為20小時或更長一些，這時的速率變化可作為臨震預測標志；平均滑動速率與倒計時間的關系在臨震階段呈對數線性趨勢，由此可推測微震活動增長率與倒計時間同樣存在對數線性關系；正應力的變化對上述時間尺度有延長作用，使之大致增加到原數值的2倍。
  19. Second, engine ' s partial velocity characteristics model and universal characteristics model are built the throttle opening is considered as an essential factor to build the model for reflecting the actual working performance of engine. the situation of the throttle opening change is studied, and a simulation method is given to use torque curved surface and vehicle dynamics equation on base of differential approach method. engine test software is developed for the engine no - load test, variable throttle opening test and throttle step change test

    其次，建立了發動機的部分速度特性模型和萬有特性模型；為了更好的反映發動機的實際工作特性，將油門開度作為一個重要參數參與建模，並對發動機變油門的情況進行了研究；結合轉矩曲面和整車動力學方程，採用微區間逼近法確定了發動機變油門過程模擬方法；開發了發動機試驗測控軟體，利用該軟體進行了發動機空載響應試驗、發動機不同油門開度試驗和油門階躍變化試驗，並對實際試驗數據和數學模型計算數據進行對比；在vc + +平臺上開發了發動機特性模擬模塊，在系統中用軟體實現了變油門控制發動機特性的功能。
  20. It has the following four features : 1. reduce starting and stopping impact, travel smoothly ; 2. the lifting speed can be designed at random in the range of 1 / 8 rated speed ; 3. to improve work efficiency, the lifting speed with no load can be set at random between the rated speed and 1. 5 times the rated speed ; 4. to change the frequency of the motor through transducer and make the motor work with slow speed in order to improve its site accurateness

    該產品具有以下四個特點： 1 .能減小啟動、停止時的沖擊，具有平穩運行的性能； 2 .能按需求設定起升速度，可在1 / 8額定速度之間隨意設定； 3 .能提高工作效率，在空載下，起升速度可在額定速度到1 . 5倍額定速度之間設定； 4 .可以通過變頻器對運行電動機進行變頻控制，從而使運行電動機微速運行，提高運行定位的準確性，還可以進行點動操作。
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