power feedback 中文意思是什麼
power feedback
解釋
能量反饋-
In order to strengthen the power of moral education, besides the distinctive subjects, proper teaching methods, various forms and the active feedback, we should pay more attention to the students " personality. according to this we can make the proper plan for the moral education and get the expectative effect
要增強德育活動的實效性，除了要有鮮明的主題、良好的方法、活潑的形式、積極的反饋之外，真正應該引起我們組織者注意的是要提高德育活動的針對性。 -
The modulating signals of firing delay angle at the rectifier and firing lead angle at the inverter, and the excitation voltage are chosen to be control variables. the offset of the current of dc line and the extinction angle and the power angle of generator are chosen to be control outputs. then a nonlinear controller is designed for the system under study according to direct feedback linearization theory
以整流側觸發延遲角的調節信號、逆變側觸發超前角的調節信號以及發電機勵磁電壓作為控制變量，以直流線路電流、逆變側關斷角以及發電機功角的偏移量作為目標輸出，用直接反饋線性化方法設計了系統的非線性控制器。 -
In the hardware design, the paper completes modules ’ design like outside memory, patulous a / d, patulous d / a, rs232 communication, ecan communication, led control, keyboard control, distant control, emulation, reset, logic voltage switch, dsp supply power regulate and ac - dc power circuit, as well as room layout design like anterior panel, back panel etc. and dsp transfers data with peripheral equipments except outside memory using serial ports. besides, the whole circuit is configured in interrupt response. thus, it can meet system demand as well as take full advantage of tms320f2812 ’ s hardware resource. in the software design, the paper finishs programs like the interface programms intercommunicates with people, the distant control program, ad and da modules ’ control program, in addition, the paper select the velocity and acceleration state - feedback algorithm and is written in the program. the software design uses dsp integrate exploiting environment named ccs2. 2 of ti inc. as software instrument, and programs with the combination of c language and assembly language. moreover, in order to maintenance or modify the software expediently and shorten software ’ s exploitation time, the design adopt software modularization technique. finally, some air cylinder experiments are carried out to proved that the pneumatic controller is very practical
在硬體設計中，本文完成了片外存儲器擴展、 a / d擴展、 d / a擴展、 rs232通信介面、 ecan通信總線介面、液晶顯示控制、鍵盤控制、遠程控制、模擬、復位、邏輯電平轉換、 dsp工作電源校正電路和ac - dc電源等模塊設計以及控制器前面板、後面板等的空間布局設計。其中dsp與除外部存儲器的外圍設備之間的數據傳送全部採用串口通信，同時系統電路配置成中斷響應方式，這樣既滿足了系統要求，又充分利用了tms320f2812的硬體資源。在軟體設計中，本文完成了人機界面功能模塊、遠程控制模塊、 ad擴展模塊、 da擴展模塊、速度和加速度狀態反饋的控制演算法的程序設計。 -
Besides tt & c transponder, the power support for pico - satellite also covers cmos camera, data processing unit and energy subsystem, by connecting and charactization which, full course from modulation and demodulation of instruction data to feedback of image data, wireless long - range transmission and the feedback of sidetone signal could be achieved
4 、整個衛星的電系統除了通信一體機外，還包括cmos相機和數據處理單元以及能源分系統。具備了這幾部分，對系統聯試，實現了從指令信號的調制解調和圖像信號的返回的全過程，並且可通過遠距離的無線傳輸。 -
Study of energy feedback snubber circuit in high power ipm three - level converter
大功率三電平變流器中的能量回饋型吸收電路 -
The company pays more attention to the sales network and after - sale service, builds a sales system centering around the provincial capital and major industrial cities, focusing on the prefecture - level cities and radiating to the county - level cities. its products are also sold to more than 10 countries or regions and supplied to the northeastern power transforming and transferring company, the liaohe oil field, sanxia project and the key projects in middle east and north america for use with good quality and favorable feedback
公司十分注重營銷網路和售後服務體系的建立，建立以省城和主要工業城市為中心以地級城市為重點縣級城市為輻射點的營銷體系，並遠銷國外10多個國家和地區並經東北送變電公司遼河油田三峽工程及中東北美等重點工程使用，質量過硬，反應良好。 -
First, it analyzes the working principle and some features of the system, such as the circulating current characteristics, power distribution characteristics, and characteristics about closed loop regulation of voltage. then it goes on to the study of some typical control methods, and designs on this basis, a parallel controller using a synchronization control strategy of racing to merging and a load - sharing strategy combined with feedback control and drooped control
文中，首先通過建立系統的數學模型，分析了逆變電源並聯運行的工作原理以及並聯系統的一些主要特性，包括它的環流特性、功率特性和電壓閉環調節特性；在此基礎上，又研究了幾種典型的並聯運行控制方式；然後，採用搶占與並發相結合的同步控制方式和反饋與下垂特性相結合的負載均分控制設計了並聯控制器。 -
In the end, the main content of this dissertation is addressed. in chapter 2, based on the analysis of present vibrator ' s principle and structure, two kinds of transfer functions and frequency response curves of the vibrator, driven by voltage feedback power amplifier and current feedback amplifier, are given separately. and turnover frequencies between different frequency rangs are also given
第二章分析了標準振動臺的工作原理和結構，在此基礎上，建立了標準振動臺的機械和電氣方程，給出了恆壓源和恆流源功放激勵下的振動臺傳遞函數及幅頻、相頻特性曲線，列出了不同頻段間的轉折頻率。 -
The essay deeply analyzes the elementary theory of the developing teacher - assess system and points out its intrinsic essence and basic principle, goes into the base in theory which consists of 5 respects and finally makes the comparison between the developing teacher assess and present - day teacher assess. the developing teacher assess system, with the purpose of the promotion, is a kind of formative evaluation which is based on the aim, stresses the process and the timely feedback. it does not consider the result of the assess as the base of prize or reproach. its direction is to face the future, its aim is to promote the all - round development of all staffs, its function is centered on the lead - in, inspiration, development, and its means is the formative teacher evaluation. it pays special attention to the desire of teachers and esteem the requirement of teachers as its motive and power of the assessment. however, the present teacher assess is the closed - ending one whose feature is mainly to stress the daily performance before the evaluation and accordingly judge whether they possess the conditions of being rewarded or reproached
其方向? ?面對未來，目的? ?促進全體教師的發展，功能? ?導向、激勵、發展為主，方式? ?形成性的教師評價制度，在啟動方式上注重教師自己的成就期望，把教師的需要當作評價的動機和力量。而現行的教師評價是終結性評價，其特點主要是面向過去，特別注重教師在評價前的工作表現，並根據教師的工作表現，判斷他們是否已經具備獎勵或處罰的條件。為了全面了解現行教師評價制度存在的問題，做到有的放矢，本研究對濟南市156名高中教師進行了調查，通過分析反映出以下問題： 1 、大多數教師對教師評價認識不清，引不起全體教師的共鳴，容易走過場。 -
The working principle, application range, merits and demerits of internal feedback speed regulation, variable - frequency speed regulation, and hydraulic coupler speed regulation are presented, as well their applications in power plants
摘要介紹火電廠電動機調速方案中的內饋式調速、變頻調速、液力偶合器調速原理、適用范圍和它們的優缺點，在火力發電廠的應用實例。 -
The final control circuit adopts power mosfet as current control device, which uses the principle of negative feedback to adjust and stabilize output current
末級電路採用功率mosfet作電流控制元件，運用負反饋原理穩定輸出電流。 -
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。 -
Topics covered include : properties and advantages of feedback systems, time - domain and frequency - domain performance measures, stability and degree of stability, root locus method, nyquist criterion, frequency - domain design, compensation techniques, application to a wide variety of physical systems, internal and external compensation of operational amplifiers, modelling and compensation of power coverter systems and phase lock loops
所涉及的主題包括：反饋系統的特性和優勢，時域和頻域性能度量，穩定和穩定度，根軌跡法，奈魁斯特準則，頻域設計，補償技術，種類繁多的物理系統應用，運算放大器的內部和外部補償，能量轉換系統的建模和補償，以及鎖相環。 -
In the differential input, positive feedback circuit was used to increase the switching speed and attain low power
在差分輸入端，採用正反饋電路結構，以提高開啟和關斷速度，並降低功耗。 -
Customers ’ needs has become the leading power of market operation, which demands the operators to pay attention to changes of customers ’ needs and lay more emphasis on their interests and feelings constantly, and get in touch with them and listen to their feedback information, so as to take necessary measures and to improve products and services, to meet the ever - changing demands of customers and set up permanent and steady relationship with them
論文分析了我國社會主義經濟發展現狀，論述了國內企業生產經營流程及營銷方式選擇，指出了企業建立營銷數據庫過程中存在的各種問題，並對這些問題的產生進行了系統的分析，找出了影響企業營銷成果的關鍵問題就是對消費者需求信息的理解和掌握，正所謂「知己知彼，百戰百勝」 。 -
The feedback of the output voltage is the major control loop. to achieve better frequency response and disturbance rejection of the input voltage, a input voltage feed - forward system is introduced in control loop. the duty - cycle of pwm applied at the gate of power mosfet is modulated by both input and output voltage
該晶元採用的控制方式為電壓型pwm （脈沖寬度調制， pulsewidthmodulation ）控制方式，以輸出電壓反饋作為主要控制參量，同時為了提高晶元對輸入電壓擾動的響應速度，採用了輸入電壓前饋方法，將輸入電壓因素引入了反饋控制環中，通過對輸入輸出電壓的檢測，控制加在功率mos管柵極電壓上矩形脈沖的占空比，進而調節輸出電壓。 -
On account of the disadvantages of the feedback reactive power compensator, a device of its simplified scheme is studied in this paper, in which the reactive power is adjusted by regulating the voltage of the low - voltage side of the transformer
由於這種反饋式補償方案存在一些問題，本文分析了它的簡化形式，即通過調節降壓變壓器低壓側的母線電壓來調節濾波器的無功出力的補償方案。 -
According to a real ac vf asynchronous dynomometer system, first step, the paper deducts the mathematic model of the system, and analyzes the system stability on the basis of the ? irst method ? of lyapunov stability, then draws the eigenvalues of the system under the situation of the variation of different parameters, and results in finding the changing regularity of the system stability caused by varitation of variant system parameter ; secondly, sets up a system simulation model in terms of a real power feedback ac vf asynchronous dynomometer system, and emulates different running states of the system, not only analyzes methods of adjusting parameters to improve the working performance in the field of weak flux of the system, but also proves the effectiveness of the methods via simulation ; at last, compares the simulation results of the model with the experiment results of the real system, and show the nearly correctness of simulation system, and also confirms the practical usage of the simulation system as an effectively assistant tool in the process of developing and design a real dynomometer system
首先根據實際系統工作原理推導出系統的數學模型，在系統數學模型的基礎上依據李雅普諾夫穩定性判別第一法進行了系統穩定性分析，繪制了系統不同參數變化時的系統特徵值變化圖，從而得到系統部分參數變化對系統穩定性的影響規律，為實際系統的參數設計提供了參考；然後又以系統數學模型為基礎，依據實際的電封閉交流變頻異步測功機系統建立系統模擬模型，模擬不同工況下系統運行情況，分析了改善弱磁區系統性能的某些系統參數調節方法，通過模擬證明了此類方法的有效性；最後將系統模型與實際系統的實驗結果進行了比較，驗證了模擬系統模型的基本正確性，也肯定了這一模擬系統在實際測功機系統設計中作為輔助工具的實用性。 -
The conventional rectifiers produce harmonic problem in power system. while three - phase pwm voltage source rectifiers ( vsr ) can provide constant dc bus voltage and get low harmonic distortion of input current. it also has line power feedback capability
傳統的整流裝置是電網污染的主要來源，三相電壓型pwm整流器具有輸出電壓恆定、能實現單位功率因數運行的特點，甚至可以實現電能回饋電網。 -
The paper describes a cw, non - cooling, digital all - solid - stated ld pumped nd : yvo4 driver which adopts microprocessor control, stability power of laser feedback and laser output power about 10mw. the system is composed of constant current source, soft diagram, protection, pulse schematic and laser power feedback loop. by combining appropriate hardware and software, we achieved, in our driver, a variety of protection features including the ability to suppress transients and reduce noise, relay soft and hardware over - current protection and overvoltage shut - off, we have obtained a continuously adjustable laser power output with high accuracy and stability
介紹一種採用單片機控制的連續運轉無製冷、數字式光反饋穩功率全固態激光器驅動電源，其輸出激光功率在10mw左右，系統包括恆流源、保護電路、脈沖驅動控制、光反饋穩功率控制等部分，結合硬體及軟體實現了激光二極體的可靠保護以及光功率穩定、準確輸出及在穩光輸出情況下，實現激光器的內外調制，並取得了一些有價值的研究成果。
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