無控制流動 的英文怎麼說
中文拼音 [wúkòngzhìliúdòng]
無控制流動
英文
uncontrolled flow- 無 : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
- 控 : 動詞1 (告發;控告) accuse; charge 2 (控制) control; dominate 3 (使容器口兒朝下 讓裏面的液體慢...
- 制 : Ⅰ動詞1 (製造) make; manufacture 2 (擬訂; 規定) draw up; establish 3 (用強力約束; 限定; 管束...
- 流 : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
- 控制 : control; dominate; regulate; govern; manage; check; cybernate; manipulate; encraty; rule; rein; c...
- 流動 : 1. (液體或氣體移動) flow; run; circulate 2. (經常變換位置) going from place to place; on the move; mobile
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Depend on the comprehensive analysis and study of the structure, principle, and exterior characteristic of the motor, through the methods of system modeling and digital simulation analysis, two kind of control device that work for the low voltage ( lvdc ) and the high voltage ( hvdc ) in avigation are researched respectively. point to the control technique of close - loop speed stabilization at a limited adjustment speed range, we bring out the close - loop speed control method that using the rotor position sensor indirectly measure the speed of the motor
在全面分析了稀土永磁無刷直流電動機的結構特點、工作原理、運行方式以及外部特性的基礎上,通過系統建模和數字模擬分析,分別針對航空低壓直流( lvdc )和高壓直流( hvdc )兩種電動機構用永磁無刷電動機,在小范圍轉速連續調節下的閉環穩速控制技術進行了詳細理論研究,提出了利用轉子位置傳感器信號間接測量電機轉速進行電機轉速閉環穩速控制的策略。This paper is based on " the remodeled item of the 122mm automatic barbette servo system ". it introduced the controlled project of brushless direct current motor realized by dsp at first. on the base of analyzing and studying the driving wave of the brushless direct current motor thoroughly and fully, it carried on the servo system ' s simulink and presented the concrete software and hardware ' s devise of the whole system in the end
本論文的撰寫是以「 122mm自行迫榴炮伺服控制系統的改型項目」為基礎,首先介紹了dsp實現無刷直流電機的控制方案,在深入、系統的分析和研究了無刷直流電機驅動波形的基礎上,然後進行了伺服控制系統的模擬,最後給出了伺服控制系統具體的軟硬體設計。In conclusion, it is primarily described that the expectable social and economical benefits of this mis are great, and the design can be fulfilled smoothly. the difficulty of this thesis is : not only think about the coordination each other synthetically on workers, equipments, technologies, data and user ' s priorities, different project and different continuation day, but also must ensure that it is agility, controllable and safe when the data be transmitted on internet or intranet
本管理信息系統強調是針對無形的數據信息產品( gis等海量數據)的生產管理信息系統,不是單純的統計計算,還要實施嚴密的控制,除需要綜合考慮人員、設備、技能技術、權限、工程、工期在計劃調度統計方面的協調性外,還需要強調海量數據信息產品的原始數據、半成品、成品在網路上流動的靈活性、可控制性和安全性。Development of control technology of brushless direct current motor
無刷直流電動機控制技術研究This paper presents the method of design and parameter optimizing in a phase - locked controller, which is used in high - speed brushless direct current motor ( bldcm ) speed control
摘要提出一種用於高速無刷直流電動機鎖相速度控制器設計和參數優化方法。This traditional building method has many shortcomings : dissever factitiously some process and nobody is responsible for connection sections, many works distributed by different departments lose managing and controlling, and many overhead costs become virtual un - control cost ; confirming the overall budget management emphases through lifecycle method, it ' s unfit for enterprise group which deals in different fields, because these deals in different fields can effect each other, and make it ' s hard to distinguish the enterprise group ' s lifecycle
這種傳統的構建方法有許多不足之處,如:將一些作業或流程人為地割裂開來,使得它們的介面部位無人負責,眾多分佈於不同部門卻相互聯系的作業因此失去管理和控制,與此相關的眾多原本可控的間接成本因此而成為事實上的不可控成本;通過生命周期法確定企業預算管理的重點,對于多元化經營的企業集團,由於各個產業之間的互動關系,往往有生命周期淡化的特點,這種方法就顯得不是十分適宜。Recently, in the field of microfluidics system the drive mode of flow is a key problem, dc electroosmoticflow micropump bases on the principle of electroosmosis, which control the flow in the microchannel with electric field. recent years, it is more and more attracting people to realize it
當前在微流控系統中液體的驅動方式是一個關鍵問題,直流電滲流微泵是基於電滲原理,利用電場控制通道中的液體流動,實現無運動部件的液體流動系統,近年越來越受到人們的重視。Making use of the packet data service and short data service of tetra, the mcs system enables front - line officers to use their portable radios and in - vehicle mobile data terminals mdts to exchange data messages with rcccs
流動電腦信息系統利用地面集群無線電的封包數據服務和簡短數據服務,令前線警務人員可以使用手提無線電通訊機和車上的流動數據終端機與總區指揮及控制中心交換數據信息。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The shm ( single hole microblowing ) as a new perturbation active control technique has been applied to the slender body with different model noses at zero sideslip and high angle of attack
摘要在亞臨界流動范圍內,對具有不同頭部形狀的尖拱形細長旋成體在無側滑大迎角下進行單孔位微吹氣擾動控制實驗。While adopts bang - bang control to realize semi - active control of vehicle suspension system equipped with electrorheologic damper, the coulomb damping force of electrorheologic damper is fixed, as the bang - bang control is two - value control actually. the bang - bang control cannot make full use of performances of the electrorheologic fluids
由於開關控制是一種二值控制,採用開關控制策略實現對電流變液阻尼器半主動控制懸架系統的控制時,電流變液阻尼器輸出的庫侖阻尼力無法連續變化,不能充分發揮電流變液的特性。Hence, the automation level of the bed temperature, one of the most important parameters for the combustion control of cfb, cannot be improved effectively
因此,作為循環流化床鍋爐的燃燒控制中的一個重要參數床溫,其自動化水平一直無法得到有效提高。Using mass flux controller ( mfc ), gas regulation system achieved accurate mix of two kinds of gases, steel bottle gas ( some compressed gas ) and zero air ( pure air ). for the sake of data transmission between dynamic air regulator and other equipments in the monitoring air quality system, normal digital interface ( rs - 232c ) make correlative role of communication interface so that automatic survey could be achieved
本儀器採用國際先進的自動控制配氣原理,採用精密質量流量控制器( mfc )來控制鋼瓶氣(某種壓縮氣體)與零空氣(純凈無污染的空氣)的混合比來得到精確濃度的校準氣體,以便於對各種氣體監測儀進行高精度校準。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 simulation results prove that this control technique can effectively minimize the torque ripple for the bldcm drives whose back - emf waveform crest width is less than 120
模擬結果表明這種控制策略能有效地抑制反電動勢平頂寬度小於120電角的無刷直流電動機的換相轉矩脈動。Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles
對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較,模擬研究和實驗結果表明,當反電動勢的平頂寬度小於107電角時,採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上,更有效地抑制電磁轉矩脈動。Development of electromechanical actuation system for flight control is one of the most important technologies in the path to all - electric airplane
摘要飛行控制中機電作動系統的發展是全電飛機的重要技術之一,而高速大功率密度的無刷直流電動機是其中的關鍵部件。The experiment consequently prove that this soft starter operates well, has the simple construction, light weight, small volume, controllable starting current and starting time, smooth starting and can reduce the current impact for motor starting. its discrete frequency control starting mode enable it to control the induction motors which drive vated load during starting
實驗結果證明此軟起動控制器性能良好,具有結構簡單、無觸點、重量輕、體積小、起動電流及起動時間可控制、起動過程平滑等優點,能有效地減小電機起動時的電流沖擊。Therefore this approach has become the highlight of the cfd field, and has received much attention. based on this optimization design theory, this thesis deeply studies some kinds of aerodynamic design problem in inviscid and viscous flow, such as aerodynamic inverse design and drag reduction problems. at the same time, the aerodynamic design optimization programs have been developed successfully
基於該設計方法的研究價值和應用前景,本文通過應用控制理論的優化設計方法,對無粘性流動和粘性流動情形下不同類型的氣動設計問題進行了深入研究,如反設計、減阻問題研究,成功發展了相應的氣動外形優化設計程序。In tapestry 4, you would configure a parameter of a component with the name of a method to invoke when a certain event occured, usually a request from the client
經常,一個導航請求(由用戶發起)將產生許多控制流請求。例如:一個表單組件將被一個動作請求觸發,並且隨后將在表單提交被要處理時發出一個通知事件,無論成功與否。分享友人