逆壓實系數 的英文怎麼說

中文拼音 [shíshǔ]
逆壓實系數 英文
inverse compaction factor
  • : Ⅰ形容詞1 (方向相反) contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 (抵觸; 不順從) go aga...
  • : 壓構詞成分。
  • : Ⅰ形容詞1 (內部完全填滿 沒有空隙) solid 2 (真實; 實在) true; real; honest Ⅱ名詞1 (實際; 事實...
  • : 系動詞(打結; 扣) tie; fasten; do up; button up
  • : 數副詞(屢次) frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. 1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %

    從功率單向流動角度出發,提出了一種lcc諧振型恆頻移相單相高頻鏈變電路拓撲,在調制0 . 1 m 0 . 5情況下,控制移相角按正弦規律變化,使諧振電脈沖列的幅值追蹤參考正弦電信號,經過整流、濾波、低頻變,從而獲得正弦度較好的輸出電。理論分析和驗結果證明對于阻性負載或阻感性負載,移相全橋具有超前橋臂零電開通,滯后橋臂或者零電開通( _ 0 )或者零電流關斷( _ 0 )的軟開關特性,而低頻變器的各個開關均現零電條件下的開通與關斷。
  2. 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vt ,在此基礎上建立了用的電力統簡化的學模型,並將擴展的dfl理論應用於此模型統,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最優控制器,通過模擬驗與採用常規的按電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,證了採用此種控制器可以有效地提高電力統的暫態穩定性,並且在電力統遭受小干擾時同樣具有良好的調節性能。
  3. In this paper what is mainly discussed is the hardware implementation of the two application specific information processing modules by cpld or fpga, which are s + p inverse transformation, the inverse transform module of an image compressing system, and 4096 - point complex fft / ifft module, the central module of the digital pulse compressing system

    本文討論的就是應用cpld fpga來現兩個專用信息處理模塊的設計。它們分別是圖象統的圖象反變換模塊? s + p變換模塊及字脈沖統的核心模塊? 4096點fft變換模塊。
  4. This digital amplifier made up of a digital inverter can implement the sine voltage signal ' s power amplifying based on the digital signal processor. with the high processing ability of dsp, the advanced digital control arithmetic can be realized in the software. also the feasible and effective technique for the time delay compensation of digital control can be achieved

    該放大統用字化變器來現電力統正弦電信號功率的放大,利用dsp字處理器高速的處理能力,可以使現高性能的演算法控制,並且能靈活地對統的誤差進行補償,從而統的高性能和高精度,為解決電力統電容式互感器二次側帶負載能力弱的問題進行了有意義的研究。
  5. The pid control of output voltage feedback is easy to give attention to static and dynamic performance of the control system. output performance of inverter of ups is improved when rms of output voltage feedback is added to pid control system. the hardware and software is designed in order to achieve the digital pid control of inverter of ups

    設計了用於變器字化控制的采樣調理電路,結合tms320f240的硬體資源,通過軟體現了ups統的緩起動和市電跟蹤,並改進了變器電瞬時值控制,通過引入輸出電流中心值檢測,對反饋電進行補償,解決了變器輸出的偏磁問題。
  6. Researching on the technology if reverse order is to study strains if pits, structural systems if basement, environmental surwey and underpinnings. on account of emphasizing developing methods if checking strength if pick - ets, modemizing machenes of excavation and studying methods of underpinning is put forward and is a way if controlling the quality of pickets in sites, which leads an active effect ; synthetic application if rankintheory, spatial and time effect theory to excavation tl aanalyze the state of soil force and strain is brought forward and the time effect should be considered in the zone of clay, the formation and development of soil plasticity are analyzed and the most dangerous zone to decide how to excavate and where to begin is found ; analyzing the cause of picket settlement during reverse order and the differential settlement and discussing hlw to solute it. duringh the temporary survey and the environmental warship, bringing rorward the theory of environmental vibration and analyzing the state of soil force and probability of losing stabilization of soil under the effect of environmental vibration ; analyzing the state offeree in underground concrete wall by the method of mathematics and pointing out the place of the maximum force and deformation. based on systematic illustrating the reverse order, problems about application and development of reverse order and suggestions also are expressed

    鑒于國內外的研究把重點放在大力發展工程樁的驗室承載力監測方法與設備、如何使土方開挖機械現代化及對周圍建築的臨測方法上,本文提出了現場利用聲波層析成像技術監測鋼砼樁內部質量的方法與程序,並得出了聲波層析成像技術是砼樁的動態質量檢測的有效手段,這對指導施有積極、現意義;提出了綜合運用朗肯土力理論、基坑空間和時間效應影響理論來分析作法施工過程中基坑邊坡土體應力及應變的變化情況,指出粘土地區也應考慮時間效應,並且進一步分析了基坑邊坡土體的塑性區形成和發展,找出邊坡最不利的區域,以確定地下室土體的挖掘的方式和順序,指出憑主觀臆斷與經驗來施工是不可取的;在分析、經較作法與大開挖順作法的地下室結構體受力情況及施工順序的不同,提出了節點處理技術;分析了作法施工期間樁的沉降變化原因及由此而產生的差異,並探討了解決的方法;本文還提出了環境振動對土體邊坡穩定產生影響的觀點,並分析了在環境振動影響下,土體的應力狀態及土休失穩破壞概率,並且還運用彈性力學知識和學分析的方法定量地分析了地下混凝土墻受力狀態,指出了被監測墻體的最大應力、應變位置。
  7. Some research about sensorless control of induction motors in recent years has been introduced in chapter one. in chapter two, a field - oriented control system with current regulator and voltage source inverter ( vsi ) is presented firstly, which is proved in theory that the voltage feed - forward decoupler can be omitted, the good decoupled control properties of flux current and torque current is also validated by experiments with speed - sensor based on f240dsp real system

    論文第二章從異步電機的基本學模型入手,介紹了一種基於轉子磁場定向的帶電流內環控制的電變器輸出閉環矢量控制結構,在理論上證明了該模型可省略電前饋解耦環節,採用f240dsp晶元構建的帶速度傳感器統驗證了其定子電流勵磁分量和轉矩分量有良好的解耦控制特性。
  8. Regard how to structure the control system of sensorless bldcm with dsp - tms320f240 as the centre in this paper, the detailed argumentation course of the motor startup, bemf terminal voltage measurement and control strategy is given out, give and pay concrete details for the software and hardware realization and experimental result. in order to treat the bldcm control system with dsp clearly, the full paper divides into six chapters altogether : chapter one, introduceing the development course, the structure characteristic and operation principle, etc. of bldcm in the introduction ; chapter two, directed against the startup issue of bldcm, the chapter give and publish the rotor measure pulse orients technology for motor startup in detail ; chapter three, proceed with mathematics model of the bldcm, expounding the control schemes ; chapter four, two important devices introducing : dsp ( 240 tms320f ) and power invertor control chip ( ir2131s ) ; chapter five, give and publish the detail of hardwares of control system ; chapter six, by ccs ide of ti, realize the control schemes in the front chapters with software, offere the procedure flow chart of main subroutine and some key place of programming, the experiment result in addition

    全文共分六章:第一章、緒論中介紹了bldcm的發展歷程、電機本身的結構特點和工作原理等;第二章、針對五位置傳感器bldcm的起動問題,文中詳細給出了檢測脈沖轉子定位起動技術;第三章、從電機的學模型入手,詳細論述了反電動勢端電法和統的控制策略;第四章、介紹了硬體現中的兩個重要器件: dsp ( tms320f240 )和功率管變器控制晶元( ir2131s ) ;第五章、詳細給出了控制統的硬體現細節;第六章、利用ti提供的ccs集成開發環境,將前面章節的控制方案用軟體加以現,給出了主要部分的程序流程圖和一些編程要點以及驗結果。
  9. The paper analyzed the basic theory and mathematic model of three phase voltage pwm inverter and proposed one kind of control strategy based on the voltage - current double - loop. it used the exterior loop to control the voltage the eps outputted, and used the inner loop to control the current. simulation testified that the control method could improve the dynamic response character and interference rejection ability

    在建立三相電型pwm變器在兩相同步旋轉坐標下的學模型的基礎上,提出了一種三相電型pwm變器基於電電流雙閉環的控制方法,利用電外環現對輸出電的穩定控制,電流內環現對輸出電流的控制,模擬證明該方法有效地改善了統的動態響應及抗干擾能力。
  10. The constitution, interface and control principle of main circuit, rectifier control module, inverter control module, generator ' s rotor speed and rotor position measuring module, information exchange module are discussed. specially, the methods of implementing signals level match in multi - voltage system, synchronizing with pc in parameters measurement and measuring rotor speed and rotor position with high precision are explained in detail

    文中討論了主電路、整流器控制模塊、變器控制模塊、電機轉速和轉子位置測量模塊以及信息交換模塊的組成、介面方法和控制原理,詳細說明了統中現不同電等級間信號電平匹配的方法、統與上位機進行同步參測量的方法以及現高精度電機轉速和轉子位置測量的方法。
  11. This thesis introduce the design of dsp control for three phase inverter, witch includes digital realization of pwm control, digital pll, swap control between inverter and utility, and communication with mcu. base on inverter model, inverter output l - c filter is investigated, and double - loop control scheme with tms320lf240 are selected

    本文主要介紹了基於dsp控制三相變器統的總體設計方案,其中包括spwm控制的現、變器輸出電字鎖相、變器與旁路間的切換邏輯及變器與上位機的通訊。
  12. For the teaching the hardware pwm inverter is designed, including the choice of power module, filter tache, auxiliary power supply, brake unit and protection circuits. in addition data sampling system is contrived with encoder and current / voltage sensors. the control circuit with tms320f240 for the core is presented at last. the circuit includes memory extension, d / a converter digital i / o interface and the interface of the serial port. the way of space vector pwm realization is briefly introduced in this paper

    接著,設計了pwm電變器,其中包括主迴路功率模塊與濾波環節、控制電源、制動單元及保護電路設計。另外還利用霍爾元件與編碼器設計出據採集統。最後,給出了基於tms320f240的最小統,包括存儲器擴展、串口擴展、字i o介面以及空間矢量pwm的現。
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