頻率鎖定 的英文怎麼說

中文拼音 [bīnlǜsuǒdìng]
頻率鎖定 英文
frequency lock
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 鎖 : Ⅰ名詞1 （安在開合處使人不能隨便打開的器具） lock 2 （姓氏） a surname Ⅱ動詞1 （上鎖） lock up 2 ...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 頻率 : frequency; rate
  • 鎖定 : [電子學] lock; locking; [訊] lockout; [航海學] caging; locking in; lock in; latch down鎖定插銷 de...
  1. It is discoverde that with a looped feedback circuit, the dds acousto - optic mode locking has the function of tracking the frequency interval of the laser resonator longitudinal mode, and stabilizing the quality of the laser beams

    Dds聲光鎖模器在增加閉環反饋環路后，可以跟蹤激光諧振腔縱模頻率間隔變化，穩定激光光束輸出質量。
  2. Empty affect refers to the frequency at empty electrical motors from lock - in normal circumstances to activate the pulse frequency

    空載牽入頻率是指步進電機在空載情況下能夠從鎖定狀態正常啟動的脈沖頻率。
  3. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  4. Since commercial pll ic came out, phase - locked - loop frequency synthesis has become widely accepted. but when narrow frequency - step is required, the loop bandwidth has to decrease while cannot meet the demand of frequency - hopping speed

    數字鎖相集成器件出現以來，鎖相式頻率合成器得到迅速發展，但是當需要窄頻率步進時，環路帶寬需要降低，致使鎖定時間變長，不能滿足快速跳頻的要求。
  5. 2. we studied the relationship between the locking bandwidth and the injected signal light intensity and verified that the locking bandwidth is asymmetric. the negative frequency detuning is larger than positive frequency detuning

    實驗證實了鎖頻范圍是不對稱的，負失諧范圍大於正失諧范圍，並且注入功率越大，鎖定范圍越大。
  6. It has been an important component of communication, radar, instrument, high - speed computer and navigation equipment. fractional - n phase locked loop ( fnpll ) frequency synthesis has been appeared in recent years

    頻率合成器是一種相位鎖定裝置，是通訊、雷達、儀器儀表、高速計算機和導航設備中的一個重要組成部分。
  7. At large attack angle the frequency of the vortex has n ' t a apparent zone of " lock - in ". the fluid - induced vibration at large attack angle belongs to the stable dynamic response problems. but a sudden skip of amplitude will occur at large inlet velocity

    在大攻角下分離渦脫落的頻率沒有一個明顯的頻率鎖定區域，流體振動屬于穩定的動力響應問題，但在大來流速度下會出現振幅突跳的現象。
  8. Firstly, the airfoil ' s classic flutter ( at small attack angle ), stall flutter ( near the static stall angle ) and response ( at large attack angle ) are analyzed. it is found from the numerical results that " lock - in " will occur at certain freestream velocity range near the static stall angle, where the frequency of the vortex will be equal to the natural frequency and the flutter has the characteristic of self - induced oscillation. when the attack angle is far from the static stall angle, the vortex will have its own frequency, which differs from the natural frequency, and the flutter has the characteristic of forced oscillation

    首先研究了二維翼型的古典顫振（小攻角） 、失速顫振（失速攻角）和動力響應問題（大攻角） ，得到以下結論：在靜態失速攻角附近的一定來流速度范圍內，分離渦會發生頻率鎖定現象，分離流的頻率與固有頻率趨于相同，這時的振動呈現自激振動的特點；遠離失速攻角時分離流頻率則擺脫固有頻率的影響，此時的振動具有強迫振動的特點。
  9. Using fiber grating to substitute traditional wavelength - selecting components, the 8nm tuning range is realized at a repetition frequency of 2. 5ghz. ( 5 ). the wavelength - tuning methods of an active mode - locked fiber laser using a ld as a modulator are researched, and two tuning methods including temperature tuning

    （ 4 ）對主動鎖模光纖激光器的波長調節技術進行了研究，用光纖光柵代替傳統的波長選擇器件實現了主動鎖模光纖激光器的波長調諧，並獲得了波長連續調諧范圍達8nm 、重復頻率2 . 5ghz的穩定的光脈沖輸出。
  10. It uses lock cirtle frequency compose technology. frequency stable is high

    採用鎖相環頻率合成技術頻率穩定度高。
  11. The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc

    系統基於斬波恆流驅動技術，按照頂層設計思想，採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架，設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能數字設定介面電路等，利用該單片機獨有的hso和hsi介面及其強大的指令系統，實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、數字化頻率設定、自動調頻變速控制、細分方波切換控制，在此基礎上，該系統還設有按預置步運行、 led頻率電壓相電流顯示等功能。
  12. The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively

    具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。
  13. The characteristic of " lock - in " can be used to explain all kinds of nonlinear phenomenon of the stall flutter

    這種頻率鎖定規律可以清楚地解釋失速顫振的各種非線性現象。
  14. Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems. the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication, radar and electronic countermeasure. the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer, the other is analog sampling phase locked frequency synthesizer. compared with the prior, the latter has many merits such as lower phase noise, samller volume, lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band

    利用鎖相原理來獲得波道數目眾多、頻率穩定度很高的頻率合成器，幾乎已成為現代通信、雷達和電子對抗等電子系統不可缺少的組成部分。鎖相式頻率合成器一般分為數字鎖相頻率合成器和模擬取樣鎖相頻率合成器兩類。取樣鎖相頻率合成器與數字鎖相頻率合成器相比，具有相位噪聲低、體積小、重量輕和功耗低等優點，尤其在微波波段的電子設備中，具有廣闊的應用前景。
  15. The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 %, which could meet the need of reference signal of the lock - in amplifier

    實驗結果表明，經過優化后的多普勒調制器的輸出調制信號頻率的相對標準誤差達到了1 %左右，能夠滿足鎖相放大器對輸入參考信號頻率穩定度的要求。
  16. Flock button. pressing the frequency lock button will disable all frequency determining controls on the front panel, to prevent accidental changes of frequency

    頻率鎖定，按下這個按鈕前面板所有頻率控制按鈕將被禁用，防止意外改變頻率。
  17. 3. the methods to improve and enhance the performance parameters of frequency synthesizer, such as phase noise and frequency stability, are discussed detailly and deeply through the linear phase model of pll which is using to implement the

    3 .利用鎖相環路的線性相位模型，詳細討論了利用鎖相環進行頻率合成時，頻率合成器的主要性能參數如相位噪聲和頻率穩定度的改進方法。
  18. At last we introduce the realization of all the parts, the problem in the circuit design and the measured data. the results show that the designed system has met the requirement. in this dissertation, direct digital synthesis technology has been used in the phase - locked frequency synthesizer, which can make full use of the characteristics of direct digital synthesis technology such as flexible output wave shape and continuous

    本課題將直接數字式合成技術用於鎖相頻率合成器中，該方法將直接數字合成的特點，如輸出波形靈活且相位連續、頻率穩定度高、輸出頻率解析度高、頻率轉換速度快、輸出相位噪聲低、集成度高、功耗低、體積小等與鎖相環路的頻帶寬、工作頻率高、頻譜質量好等優點有機的結合起來，從而在寬帶的條件下實現了比較好的雜散性能和相噪。
  19. The influence of the blowing factors to the flutter and the lift coefficient is analyzed. secondly, the self - induced vibration of seals are analyzed by fluid - structure coupling numerical method. the self - induced oscillation of the seals will occur at large rotational speed, however, this phenomenon ca n ' t be simulated with the

    採用本文的流固耦合方法成功地捕捉到頻率鎖定的現象，且發現隨著轉速的提高，固有頻率也增大，從而證明高轉速下密封轉子會發生自激振動，傳統的剛度阻尼方法對此是無法解釋的。
  20. In the modem experimental investigation of quantum optics and quantum information, the accuracy of the long - term frequency stability of lasers is required in the range of a few mhz

    由於在量子光學及量子信息等有關實驗中，需要多處進行頻率鎖定，且精度在兆赫（ mhz ）范圍。
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