field frequency control 中文意思是什麼

field frequency control 解釋
場頻控制
  • field : n 菲爾德〈姓氏〉。n 1 原野，曠野；（海、空、冰雪等的）茫茫一片。2 田地，牧場；割草場；〈pl 〉〈集...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • control : n 1 支配，管理，管制，統制，控制；監督。2 抑制（力）；壓制，節制，拘束；【農業】防治。3 檢查；核...
  1. Fly field frequency control is a key to fly field safety

    飛場頻率管控對飛行安全極為重要。
  2. When go to a new fly field, it is not only a courtesy but also a safety measure to register your frequency and follow the frequency control procedures

    當您去一個新的飛場的時候，主動注冊您的頻率遵守頻管規程不只是一種禮貌，更是保障安全的必要做法。
  3. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。
  4. This text will analyze technology requirement and realization way of flow field adjusting system of fl - 8, and expatiate the theory of frequency conversion. ac variable frequency speed regulator controlled by dtc become the key technology of this facility and make it more advantage and credible. new method and tactic to control wind speed was given

    本文分析了fl - 8風洞流場調節系統的技術需求和實現途徑；闡述了變頻原理， dtc控制的交流變頻調速器作為風洞流場調節系統的先進性和高可靠性及關鍵技術；提出了風洞風速控制的方法和策略。
  5. The dynamic character of the rotor system is the same as that without magnetic field when the magnetic field frequency is over a critical frequency, and the sinusoidal magnetic field cannot control the dynamic performance of the disk type mr fluid damper

    當磁場的頻率高於一個臨界頻率后，轉子系統的動力特性與無磁場時的動力特性相同，正弦磁場不能夠控制磁流變流體阻尼器的動力特性。
  6. This paper expatiated that the mathematics models of ac motor is higher order, non - linear and closed coupling, multivariable input - output system. and introduces the principle and the algorithm of sine pulse width modulation ( spwm ), opened - loop space voltage pulse width modulation control ( svpwm ) and field oriented control ( foc ). finally, realized the control strategies of variable - frequency speed regulating using assembly and c language

    文中闡述了交流異步電機的數學模型是高階、非線性、強耦合的多變量輸入輸出系統，介紹了交流電機的正弦脈寬調制、開環電壓空間矢量的u / f控制和磁場定向控制的原理及控制演算法，並利用dsp構成控制系統，通過匯編語言和16位定點c語言混合編程的方法實現了上述的變頻調速控制策略。
  7. According to the present problems and developing tendency of hydraulic turbine governor, four main issues of this field are studied in this paper. the content include hydraulic control system, frequency measurement unit, stability of the discrete control system, optimization of control parameters and self - adjusting pid control strategy based on fuzzy logic. several main achievement and results are obtained and shown as follows : the electric - hydraulic pilot valve driven by step - motor is firstly proposed, which solves the problem that the electric - hydraulic converter of hydraulic turbine governor hydraulic servo is prone to be stuck and blocked and improves the systemic stability greatly

    本文根據水輪機調節領域存在的問題和發展趨勢，對水輪機調速器的液壓控制系統、頻率測量環節、離散調節系統穩定性與調節參數最優整定以及適應式參數自調整pid控制策略進行了研究，得到以下主要成果和結論：首次提出了採用步進電機驅動的步進式電液引導閥，從根本上解決了水輪機調速器電液隨動系統中存在的電液轉換元件發卡、堵塞問題，使電液隨動系統的可靠性大大提高。
  8. A frequency conversion timing control system for constant pressure water supply based on lonworks field bus

    現場總線的恆壓供水變頻調速系統
  9. In chapter five, on the basis of setting up a set of math models of four - dimensional pressure control system, and making use of copying tool - simulink supplied by matlab, the frequency and time field specific property has been analyzed, and several curves of frequency and time field specific property in the systemhas been obtained. as a result, some modelled conclusions have been acquired

    第五章在建立四維井底壓力控制系統數學模型的基礎上，採用matlab提供的模擬工具? simulink ，對系統頻域特性、時域特性進行了分析，並獲得該系統的頻域特性曲線、階躍時間響應曲線等，最終給出模擬結論。
  10. For multiphase permanent - magnet synchronous motor ( pmsm ) frequency conversion speed control system has high reliability, so it becomes one of research emphases in the field of electric transmission

    多相永磁同步電動機變頻調速系統因為其高可靠性而成為電氣傳動領域的研究重點。
  11. All above are included in robust control theory in frequency field and robust control theory in state - space field. how to combine the results of the two fields to form a new method ? how to perform the method efficiently in application

    如何將頻域魯棒控制理論和狀態空間魯棒控制理論綜合在一起，併合理的運用於控制系統的設計，是一具有挑戰性的課題。
  12. The inverter apparatus controlled by pre - set voltage adjustment project has the advantages of low harmonic content, high output frequency precision, simple control circuit. therefore, this kind of project is the hot point in inverter power studying field

    用「開關預置式電壓調節方案」控制的逆變電源具有輸出諧波含量低、輸出頻率精度高、控制電路簡單等優點，是逆變電源研究領域的熱點。
  13. The design had friend human - computer interfaces to monitor the field situation, realized the high precision temperature control with the pid - fuzzy control method, realized the high precision control for motor combining plc with closed - loop control and tension - monitor on - line of variable frequency drives, avoid the hard border and overlapping yarn by four grades stroke modification and changing winding angle incessantly

    利用友好的人機交互界面，實現強大的監控管理功能；利用pid模糊控制實現熱箱溫度的精確控制；採用plc結合變頻器閉環控制和在線張力監測實現電機的高精度控制；通過四級動程修正和持續改變卷繞角，防止硬邊和疊絲。
  14. In the field of ac machines control, a strategy called variable frequency control is mostly used

    在交流調速領域中，應用最廣的是變頻調速技術。
  15. Also this paper investigates the control model based on the stator field - oriented vector control. this paper discussed the newly excitation system - matrix converter and compares the const speed const frequency asynchronous wind generators and vscf generator system

    本文在模擬風速和風機特性的同時，構造整個系統模型並對變速恆頻和恆速恆頻技術的優缺點進行了模擬分析比較。
  16. Our company focuses on the r & d of new products and high technology actively, make full use of the internal group ' s advanced technology ? electro - hydraulic control and microcomputer frequency conversion control, and develop the new machine category constantly in rubber & plastic molding machinery field, to meet market demand

    公司積極注重新品和高新技術的研發，充分利用集團內電液控制和微機變頻控制等先進技術的組合優勢，不斷開發橡塑成型機械領域的新機種，滿足市場的需求。
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