負調制系數 的英文怎麼說

中文拼音 [fùdiàozhìxìshǔ]
負調制系數 英文
negative modulation factor
  • 負 : Ⅰ名詞1 （負擔） burden; load 2 （虧損） loss 3 （失敗） defeat Ⅱ動詞1 [書面語] （背） carry on th...
  • 調 : Ⅰ動詞1 （配合得均勻合適） harmonize; suit well; fit in perfectly 2 （使配合得均勻合適） mix; adju...
  • 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. 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
  2. 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逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實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壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。
  3. Finally, we can not use electric power but the engine of bus or subsidiary engine to drive air compressors of bus air conditions. because the change range of turnaround speed of engine is very wide, that brings difficulties in controlling the rate of flow of cold - producing medium. in the control of bus air - conditions, preventing evaporator from freezing to make the air - conditions work with high efficiency and controlling the temperature of railway carriage are the basic tasks in air - condition control

    與一般的建築空調相比，汽車空調的工作環境惡劣，條件差，控制難度要增加很多，主要體現在以下幾個方面：一是車外熱負荷變化大，難以確定控制參數；二是要求空調負荷大，而且要控制空調使其降溫迅速：三，不便於用電力作為動力源，必須用汽車發動機或輔助發動機來帶動壓縮機，當採用汽車發動機作為動力源時，由於汽車的車速變化大，發動機轉速的變化可從600r min到4000r min ，壓縮機轉速與發動機轉速成正比，其轉速變化高達7倍，給空調系統製冷劑流量控制帶來困難。
  4. When cooling load is less than ice - melting ability, optimal control strategy is just ice priority, optimal control saves 24 - 45 % operating cost compared with chiller - priority. when cooling load is more than ice - melting ability but still less than ice - melting ability plus half of chiller cooling ability, optimal control is to keep chiller load to half of chiller cooling ability and tune ice - melting to meet load, optimal control consumes 13 - 20 % more power but saves 9. 2 - 11 % operating cost compared with chiller - priority. when cooling load is more than ice - melting ability plus half of chiller cooling ability, optimal control is just ice - priority again, optimal control is to keep ice - melting to maximum and tune chiller to meet load, optimal control consumes 0 - 13 % more power but saves 0 - 9. 2 % operating cost compared with chiller - priority

    在冷負荷大於融冰供冷最大功率時，又分兩種情況:總冷負荷小於融冰供冷最大功率加一半的單主機滿負荷時，優化控制是保持主機供冷負荷系數為0 . 5 ，通過調節融冰來改變冷負荷，此時與主機優先比較增加能耗13一20 % ，節約運行費達9 . 2一11 % ;在冷負荷大於融冰供冷最大功率加一半的單主機滿負荷時，優化控制就是融冰優先，通過蓄冰槽滿負荷運行，調節製冷主機來調節冷負荷，此時比主機優先控制僅增加能耗o一13 % ，但能節約運行費o一9 . 2 % 。
  5. Then pid flow rate control algorithm is introduced. all experiments made in this chapter are about measuring the valve parameters according to spool positions, single actuator flow rate control by the calculated flow rate feedback control method, free flow rate dividing control under the sufficient pump discharge flow rate situation, proportion flow rate dividing and flow rate dividing based on meter - in flow rate feedback control method under insufficient pump discharge flow rate situation. the results of all experiments proved that the method presented in this thesis is an effective way to overcome the unreasonable flow rate dividing when simultaneously operating multi - actuators with different inertia loads

    第四章介紹了多執行器復合控制實驗系統和實驗方法；介紹了實驗採用的流量控制的pid演算法；並測定了執行器控制閥和閥芯位移相關的系數；做了單個執行器計算流量反饋流量控制、流量足夠情況下多執行器流量任意分配、流量不足情況下多執行器按比例調節流量分配和多執行器進油側流量反饋分流控制實驗；通過實驗說明了論文提出的分流控制方法能實現大小慣性負載復合操作時的合理分流。
  6. It includes : dynamic show of technics flow, real time data acquirement and show, history data save and print, fault alarm, etc. the plc control system mainly accomplishes the wastewater technics flow control, harmonizes the logical relationship among local intelligent control instruments and transmits the state of each local equipment to the industrial computer simultaneously, the plc control station receives the control commands from the industrial computer ; the local intelligent units take charge of the correlated parameters measure, disposal and control, and it will transmit the related parameters to the computer, etc. in this thesis, introduced municipal wastewater treatment technics, the integrated application program development of computer, the design method of plc control station, the communication between plc control system and computer, and the network of wastewater treatment with profibus - dp was also discussed

    上位計算機主要實現遠程監測和管理功能，具體包括:工藝流程動態顯示、實時數據獲得及顯示、歷史數據存儲與列印、故障報警等功能plc控制系統主要完成工藝流程式控制制以及協調現場各智能儀表之間的邏輯關系，將現場各設備的運行狀態通過通訊網路傳輸到上位計算機，並接收上位計算機的控制指令;現場各智能儀表單元負責各相關參數的監測和處理、控制，並將有關參數送往上位監控計算機進行處理、保存等。本文以莎車污水處理項目為例，介紹了城市污水處理工藝、上位監控計算機的綜合應用程序開發、城市污水處理自動控制系統plc控制站的設計和採用profibus系列中廣泛應用於現場設備的profibus - dp總線。
  7. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  8. Thermal stress control system actually gather the real - time data of unit sets ， compute temperature fields ， stress fields and maximum dangerous stress by the math modal ， decide target and speedup rotation in every stage of startup process ， and justify automatically to realize auto control a serial of processes of turbine ， such as speedup ， warm - up ， connecting net ， load changing ， stop and unsteady condition etc ， and improve automatic level of the unit sets. turbine auto startup ( tas ) system can automatically evaluate steam turbine ' s startup and load changing process according to thermal stress of

    熱應力控制系統實際是對機組運行參數進行實時採集與監控，通過數學模型實時地計算高、中壓缸轉子的溫度場、應力場分佈，以及最危險熱應力，以確定啟動過程各階段的目標轉數及升速率，並進行自動調整，實現機組沖轉、升速、暖機、並網、升負荷、停機以及異常工況下的自動控制，大大提高了機組的自動化水平。
  9. Then, as the substitute of the traditional pi controller, neuron adaptive psd controller is used to alternate the velocity loop of dc driver system, simulation results show that the super - shoot in new system is small and the performance in the way of anti - disturbance and anti - time - varying parameters are higher than the traditional pi controller and robustness of the dc driver system improved greatly, in addition, through analysis of the character of the neuron adaptive psd controller, the paper presents a neural network self - tuning control method for dc driver system in which the diagonal recurrent neural network is used to identify the plant to calculate the plant ' s sensitivity for psd controllers simulation results indicate that excellent static dynamic target was got with this control method and the performance of the system is improved greatly,

    然後，應用單神經元自適應psd控制器改造調速系統的轉速環，代替傳統pi調節方式的轉速控制器。模擬表明，新系統在超調、抗負載擾動和參數時變方面性能優于的傳統的pi控制方式，系統的魯棒性增強。在分析單神經元自適應psd控制器特性后，本文提出用對角遞歸神經網路辯識控制對象，為psd控制器提供靈敏度參數，從而構成一神經網路自校正控制方案。
  10. There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control ， decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively

    現代電站的生產過程中存在過熱汽溫、再熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象，它們中有些還是具有強非線性特性的對象或多變量耦合系統，採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段，則需要建立被控對象的數學模型，而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而極大地限制了其在現代電站中的應用。
  11. The research objective is to improve the control system performance through the combination of the advanced control strategy with the meaningful information mined from the history operation database. firstly, a new solution for the control performance enhancement is presented by the reference of the kdd technology. aiming at practical application, a novel boiler load control method, which combines the multiple model adaptive control strategy with the data mining technology, is put forward in this dissertation

    本文第一部分為熱工過程式控制制與數據信息採掘，研究的重點是通過先進控制策略的應用以及運行數據中發掘的有用信息，提高現有典型熱工過程式控制制系統的性能，內容包括：首次提出了借鑒數據信息採掘技術的思路和方法，用於完善現有的熱力系統優化控制方案；在此基礎上結合生產實際，提出了運用多模型自適應策略實施鍋爐負荷控制，並利用關聯規則的數據信息採掘方法，通過對燃料發熱量信息的在線診斷，優化控制器結構，同時實現鍋爐燃燒配風的自適應調整，提高負荷、燃燒控制系統性能。
  12. The water turbine regulation system is a complicate auto - controlling system, it ' s small fluctuation dynamic course means : when the water turbine regulation system is interfered by tiny disturbance of load or command signal, the change of different parameters in the system is less, we can thought they are subtle change near by the discussing conditions, so we can make each tache in the system linearization, that is, describe the dynamic specialty of each tache and the whole system by means of linear differential equation

    水輪機調節系統是一個復雜的自動控制系統，其小波動過渡過程是指水輪機調節系統在受到微小的干擾（負荷或指令信號擾動）時，系統中各參數的變化都較小，可以認為是在所討論工況點附近作微小變化，則可將調節系統各環節加以線性化，用線性微分方程式來描述各環節及整個系統的動態特性。
  13. Stability of main steam pressure is the foundation of the key parameter stability ( include the main steam temperature, the vapor pack water level, the oxygen content in the smoke etc. ) in the units, deb system increase the dependability and the economy greatly with the settlement of the energy ' s equilibrium between the boiler and the steamer

    本機組利用先進的硬體設備dcs和優化的控制策略deb ，圓滿解決了機組協調控制系統中主汽壓力穩定性及負荷適應性這一主要矛盾。主蒸汽壓力穩定是機組一切關鍵參數（包括主蒸汽溫度、汽包水位、煙氣含氧量等）穩定的基礎， deb系統解決了機組鍋爐和汽輪機之間能量平衡，使機組可靠性和經濟性大大提高。
  14. ( 1 ) the dissertation theoretically analyses software direct compensating motor speed loss of open loop pump - control - motor speed governing system with inverter. the motor speed loss formula and compensating coefficient formula are given, and this provides the theoretic foundation for using software direct compensating method. the dissertation puts forward the control scheme of software direct compensating motor speed loss of open loop pump - control - motor speed governing system with inverter, and the method of " load sectionalization linear compensation "

    具體來說，本文的主要貢獻包括如下幾個部分： （ 1 ）對軟體直接補償開環變頻泵控馬達調速系統的馬達轉速降落進行了理論分析，給出了馬達轉速降落公式和補償系數公式，為軟體直接補償開環變頻泵控馬達調速系統的馬達轉速降落提供了理論依據；提出了變頻泵控馬達調速系統的負載補償控制方法和「負載分段線性補償」方法，由此提高了調速系統的速度剛性和調速精度。
  15. The industrial computer mainly implements the functions of long - range supervision and management it includes : dynamic show of technics flow, real time data acquirement and show, history data save and print, fault alarm, etc ; the plc control system mainly accomplishes the wastewater technics flow control, harmonizes the logical relationship among local intelligent control instruments and transmits the state of each local equipment to the industrial computer, simultaneously, the plc control station receives the control commands from the industrial computer ; the local intelligent units take charge of the correlated parameters " measure > disposal and control, and it will transmit the related parameters to the computer, etc. in this thesis, introduced municipal wastewater treatment technics, the integrated application program development of computer, the design method of plc control station, the communication between plc control system and computer, and the network of wastewater treatment with industrial ethernet was also discussed

    上位計算機主要實現遠程監測和管理功能，具體包括：工藝流程動態顯示、實時數據獲得及顯示、歷史數據存儲與列印、故障報警等功能； plc控制系統主要完成工藝流程式控制制以及協調現場各智能儀表之間的邏輯關系，將現場各設備的運行狀態通過通訊網路傳輸到上位計算機，並接收上位計算機的控制指令；現場各智能儀表單元負責各相關參數的監測和處理、控制，並將有關參數送往上位監控計算機進行處理、保存等。本論文介紹了城市污水處理工藝、上位監控計算機的綜合應用程序開發、城市污水處理自動控制系統plc控制站的設計和採用工業以太網技術的污水處理通信網路。
  16. According to the characteristic of nine - area diagram of substation vol / var coordinated control, this system gives the defination of fuzzy sets and the degree of membership of input / output variables, and designs corresponding control rules. the results of simulation demonstrate the system can satisfy the constrains of the day - adjusting times of the switching of on - load transformer and paralleled compensation capacitors, and ensure voltage quality, reactive power basical balance. considering the var requirement in different load time period and the control demand in load saltation, a improved control scheme is provided. the results of simulation show the improved scheme can meet the demand of vol / var in different load time period, protect the wrong operation when either voltage or reactive power appears saltation, and decrease the times of regulation of the switching of on - load transformer and paralleled compensation capacitors finally, a background software module of substation vol / var coordinated control is designed, based on the supervisory control and data acquisition system of substation

    模擬結果證明該系統能在各種負荷條件下確保電壓合格和無功基本平衡，且能滿足變電站對有載調壓變壓器分接頭日調節次數和並聯補償電容器組的日投切次數的限制。通過考慮不同負荷時段對無功功率的需求和負荷突變情況下的控制要求，對上述模糊控制策略進行了改進，模擬結果證明改進后的控制策略能滿足不同負荷時段對電壓和無功的要求、抑制電壓或無功突變情況下的誤動作，且有效地減少了有載調壓變壓器分接頭和並聯補償電容器組的調節次數。最後基於變電站scada系統設計了一后臺電壓無功綜合控制軟體模塊。
  17. Besides supervising the system, mcu control system takes charge of the display of the current and the arc voltage, the communication with pc and the control of other assistant equipment. the following is the process

    單片機控制系統除了負責系統的總體管理外，在控制上還負責給定參數的的設置和焊接電流、電壓的顯示以及與pc機的通訊和一些輔助設備都是由它來實現協調控制的。
  18. This thesis analyzes the control principles of energy regulating ways in reefer units, compares the merits and demerits of these control methods in the outside working conditions of the changing burthen, and then puts forward the wvf, a entirely new energy saving regulative and control method. in addition, the thesis educes the heat response factors of container ' s round wall constructions by analyzing the dynamic heat transfer and adopting the method of heat response factors, and illustrates the refrigerated container ' s characteristics through an experiment on an empty refrigerated container

    本文通過分析目前冷藏集裝箱的能量調節方式，比較了這些控制方式在箱外負荷變化的情況下的能量調節優缺點，在此基礎上提出全新的變頻能量調節控制方式：通過對冷藏箱圍壁結構的動態傳熱性能的分析和熱反應系數法的應用，得出了各圍壁結構的熱反應系數；通過冷藏箱空箱降溫實驗分析了製冷系統在空箱打冷時系統的特性。
  19. This paper introduces the principle and method of forced - air cooling system of transformer controlled by dsp, according to the season and load of transformer, the designed system can automatically accomplish frequency conversion and the cooling device ' s devotion by fuzzy - neural network controller

    摘要介紹了以dsp作為核心控制器件的大型變壓器風冷控制系統的原理和實現方法，根據變壓器負荷、季節等變化，通過模糊神經網路調節器自動投切冷卻器組數以及是否進行變頻運行。
  20. The core control of the whole control system is accomplished by plc, including sequence action control, numerical calculation, processing control of frequency and so on, and the realization of vvvf is accomplished by transducer. the simulation of inertia load is completed well by union of both plc and transducer

    整個控制系統的核心控制由plc完成，包括動作順序控制、數值計算、頻率的過程式控制制等，而變頻調速的實現靠變頻器來完成的，兩者相互結合較好地完成了慣性負載的模擬。
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