流動畸變 的英文怎麼說
中文拼音 [liúdòngjībiàn]
流動畸變
英文
flow distortion-
Based on the principle of mechano - chemistry, the strong shock and crashing mechanical force produced by ls - 250 pulverizer can act to the surface of superfine carbon and white carbon particles during the process. the result of the experiment indicated that distortion and amorphism change occur to the surface crystal lattice of carbon particles, and the phenomena are prick up as the action time of mechano - chemical force
依據機械化學原理利用ls一250型流能粉碎機高速旋轉的動齒工作過程中產生的強烈沖擊、碰撞機械力,使其作用於超細石墨及白碳黑顆粒表面,檢測表明,石墨粒子表面晶格發生畸變及無定形化,且隨著機械力作用時間的延長而加劇。The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly
但是在母線區外發生短路故障(特別是故障電流含有大量非周期分量)時, ct會出現飽和現象, ct飽和后,不能正確地傳變一次側電流,從而使二次電流發生嚴重畸變,產生很大的差電流,這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題,近年來提出的在ct二次電流過零時的線性傳變區投入差動保護,避開ct飽和區,能對母線故障做出正確判斷。The temperature dependences on the resistance in all the thin films show that in the low temperature range the width of eg band level changes the transports, but in the high temperature range the thin films forms the small polarons hopping conductivity. the phase transition induced by the current is explained by the demagnetization and lattice distortion
在高溫部分,材料呈現小極化子跳躍形式輸運特徵;實驗研究了不同偏置電流對薄膜的相變影響,表明電場可以引起材料中磁性的變化和晶格畸變,導致相變溫度點向低溫方向移動;材料的光致相變研究表明光子能量、光強和極化方向對輸運性質有影響。When there are struts at the divergent parts of inlet, the total pressure recovery coefficients and the kinetic energy coefficients of inlet decrease, and the flow distortion index increases obviously
當進氣道擴壓段有側向支柱存在時,進氣道總壓恢復系數和動能系數均有所降低,而流場畸變指數則顯著增大。In order to investigate the unsteady flow frequency domain performances of an axial flow compressor at different mass flow, rotating speed and blade row spacing, plus inlet flow distortion, and considering aerodynamic characteristics and stability of the compressor, the low speed research compressor ( lsc ) at college of energy and power in nuaa is used to carry out the experiment studies. a large amount of test data has been gained through dynamic pressure transducers embedded in the stator blades at the tip, middle and hub section, then fast fourier transform algorithm ( fft ) is applied to calculate the frequency data
為探討軸流壓氣機在工作流量、工作轉速及動?靜葉排軸向間距變化時的葉片排流場非定常頻譜特性變化規律,並耦合進氣畸變的影響,同時與壓氣機氣動性能和氣動穩定性相關聯,作者利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機( lsc )試驗器,採取在靜子葉片表面埋入動態壓力傳感器的實驗方法,對葉尖、葉中和葉根三個截面的動態壓力進行了測量,獲得了大量的可靠的實驗數據。The widely applications of nonlinear instruments have produced many high order harmonics, they are flowing into the power network and greatly influence the quality of electric power. and the frequency is n ' t constant but changed around 50hz
電網中非線性設備的使用日益增多,所產生的高次諧波電流大量注入電力線路中,使得電網電壓、電流波形發生畸變,同時電網頻率並不是固定不變的,而是在50hz附近波動。Based on the generalized dynamic inflow theory and classic non - steady aerodynamic loading theory, a real time model is obtained by establishing wake distortion and decay
在廣義動態入流理論的基礎上,基於經典非定常氣動載荷理論,建立了尾跡畸變和尾跡耗散的實時分析模型。The resolution of optical system can not reach its diffraction limit because of the phase aberrations caused by atmospheric turbulence and other wavefront errors. adaptive optics technology uses deformable mirrors to perform dynamic phase modulation and endow optical system the ability to decrease the influence of dynamic wavefront errors
大氣湍流等動態干擾使光波面相位發生畸變,使光學系統的解析度無法達到其衍射極限,而自適應光學系統使用變形鏡對光波面進行動態相位調制,賦予了光學系統能動可變的能力而有效地解決了動態干擾的問題。The non - ideal bemf waveform of bldcm is often caused by two facts. one is that the platform width of bemf waveform is less than 120 ; the other is the cogging harmonics existed in the bemf waveform
非理想反電動勢波形的無刷直流電機有兩種情況,一種是反電動勢的梯形波的平頂寬度小於120 ;一種是由於磁場分佈受齒槽的影響,反電動勢存在齒諧波,使其波形發生畸變。The experimental results show that the unsteady flow frequency domain performances of the axial flow compressor will be varied with mass flow, rotating speed, blade row spacing and inlet distortion
實驗結果表明,工作流量、工作轉速、動?靜葉排軸向間距以及進氣畸變均對壓氣機的非定常頻譜特性產生影響。To put into operation a large amount of non - linear load, make in harmony wave of rural power grids serious becoming in pollution, pass to rural local electric wire netting main in harmony analysis of wave source, put forward in order to restrain from insert rural power grids in harmony wave source voltage total in harmony wave distortion rate and the containing rate change last device number pulsating for increase of goal, increase the pulse of the current change device and install light specified value electricity active wave filter mix with passive wave filter near the harmonics source to control the wave in harmony
摘要大量非線性負荷的投運,使農村電網的諧波污染日趨嚴重,通過對農村地方電網主要諧波源的分析,最終提出了以限制接入農村電網的諧波源的電壓總諧波畸變率和各次諧波電壓含有率為目標的增加換流裝置脈動數,以及在諧波源附近裝設小額定值的電力有源濾波器配以無源濾波器的混合型電力濾波方式,以進行諧波治理。To study the aircraft - engine stability assessing technology about total - press distortion, four different structure insert - boards and testing schemes are designed, based on the technology of russian insert - board distortion and assessing compressor stability of english and usa. the low speed compressor ( lsc ) at college of energy and power in nuaa is used to carry out the all insert - board distortion experiments studies
為了能夠更清楚地認識俄羅斯關于總壓畸變下的航空發動機穩定性評定的技術,本文在了解俄羅斯插板畸變試驗技術和英美等國家的穩定性評定技術的基礎上,設計了4塊不同結構形式的插板畸變擾流器裝置及試驗測量方案,利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機( lsc )試驗器,完成了各插板的畸變試驗。Apf can achieve dynamic compensation for harmonics and reactive current, and the compensate performance is not affected by the impedance of the electric network, it has advantages as follows, fast response, high controllability and adaptability, etc. analysis is performed to existing main circuit topology, harmful current detecting method and current tracking control of apf in this paper
有源電力濾波器可實現對諧波和無功的動態補償,其補償特性不受系統阻抗的影響,具有響應快、可控性高、自適應性強等優點。本文對現有的有源電力濾波器的各種主電路拓撲、畸變電流檢測和電流跟蹤控制方法進行了分析。At the same time, the possibility of using nonlinear optics in widening the detecting wave band of hartmann - shack wavefront sensor is exploringly discussed. adaptive optics guarantees the beam quality of laser projecting system. beam cleanup, atmospheric turbulence compensation and correction of any disturbance and fabrication error in the light way are required to promise a near diffraction beam, but normal adaptive optics system can only correction one of them
自適應光學進行光束大氣傳輸波前畸變校正時,要求系統必須能進行光束凈化和校正大氣湍流造成的波前畸變,並且能夠同時有效地克服發射系統製造誤差、重力變形以及光路內部氣體擾動的影響,得到接近衍射極限的輸出激光光束。Repetitive control is used to reduce voltage distortion under abrupt load variation or nonlinear loads and attain good quality of the voltage waveform ; current loop is designed to quicken the dynamic response and strengthen the ability of the inverter control
重復控制可以抑制逆變電源在負載變化嚴重(空載加到滿載)或者非線性負載條件下的輸出電壓畸變,保證輸出波形的質量;電流環用以改善輸出波形的動態響應特性,提高逆變控制的能力。With development of high - speed missile imaging detection aero - optical effects, certain accomplishments on theoretical analysis have been obtained. the laboratory test system needs to be built to vertify the correctness and validity of theory. at the same time, to study the transient influence of high - speed flow on image transmission, an aero - optical effect experiment of wind tunnel is needed furtherly on the foundation of the transform of wind tunnel, in order to use the researching accomplishment of aero - optical effects in the aero - optical distortion image adjustment evaluation
隨著高速導彈成像探測氣動光學效應機理研究工作的深入開展,在理論分析上取得了一定的成果,需要搭建實驗室試驗系統來驗證理論的正確性和有效性,同時為了較真實地研究高速流場對圖像傳輸的瞬態影響效應,需要在風洞改造的基礎上進一步進行氣動光學效應風洞試驗,期望將獲得的氣動光學效應研究工作成果用於氣動光學畸變圖像校正效果的評估。In the modern power system, acute fluctuation of load lead to great difference of wave crest and trough, abundance non - linear load make severe aberrance of current and voltage wave. these factors make remarkable increase of error of energy metering and unrational billing
現代電力系統中,負荷波動劇烈使負荷峰谷差值很大,大量的非線性負荷使電流、電壓波形畸變嚴重,這些因素使電能計量誤差顯著增大,並使計費不合理。On the basis of analyzing the result of the test, we have improved the structure of the damper and revised the systematic model. we have experiments on the damper to test its damping performance. comparing with the simulation force - displacement curves, we gave an explanation of why the factual force - displacement have aberrances, which gave warrants to the parameter design and structure ' s improvement. we found the state equation of the semi - active suspension on the semi - active adaptive control strategy and use computer simulations to compare the passive suspension structure and er semi - active suspension. computer simulations indicate that er semi - active suspension have greatly improved driving smoothing and control stability. at the same time semi - active suspension is of simple structure and low cost. so in the long run, the semi - active suspensions may have wider application
在對試驗結構進行分析的基礎上,改進了減振器的結構,修正了系統的模型;對自適應減振器性能進行了大量的測試,通過與模擬結果比較,分析了造成示功曲線局部畸變的原因,為機構及其參數設計以及改進提供了依據;基於振動半主動自適應控制策略,建立了半主動懸架系統的狀態方程,並且進行了模擬,從而得出與被動懸架結構相比,採用電流變流體減振器的半主動懸架在汽車行駛平順性和操縱穩定性上均有較大的改善,性能大為提高。The extensive applications for power electronic apparatus and nonlinear equipment distort the waveforms of voltages and currents. as a result, power quality is going much worse. in addition, due to the improvement of industrial automatization, such parts of an apparatus as mpu and plc are applied to industrial process controls, which are disturbed easily by stirs from power system
一方面由於電力電子器件和非線性設備的廣泛應用,使得電網中的電壓、電流波形發生畸變,造成電能質量的嚴重惡化;另一方面由於工業自動化水平的提高,微處理器和plc等智能器件大量應用於工業過程式控制制,而這些精細過程式控制制更容易受到電力系統抖動的影響,因此現代工業對電能質量提出了更高的要求。分享友人