automatic frequency control 中文意思是什麼
automatic frequency control
解釋
自動調頻-
Afc, automatic frequency control
自動周波數制御 -
Automatic frequency control afc
自動頻率控制 -
Afc automatic frequency control
自動頻率調節 -
Adopt dual cooperative control technology and frequency automatic following control, the protective performance is more complete and its reliability is much higher, low heat penetrating effect of frequency is good
200型主要特點：採用雙調控技術，頻率自動跟蹤控制，保護性能更完善，機器可靠性更高，頻率低透熱效果好。 -
Automatic frequency control characteristic
自動頻率控制特性 -
Control of microcomputer, frequency control of motor speed, touching panel, programmable operation with rcf automatic computing and setting, adjustable rise - and - fall speed
微機控制、變頻調速、觸摸面板、可編程操作、具有rcf自動計算與設定、 0 - 9檔升降速可調。 -
Control of microcomputer, frequency control of motor speed, touching panel, programmable operation with rcf automatic computing and setting, adjustable rise - and - fall speed from grade 0 to 9
微機控制、變頻調速、觸摸面板、可編程操作、具有rcf自動計算與設定、 0至9檔升降速可調。 -
Automatic frequency fine control locking - in range
自動頻率微調同步范圍 -
Electronic ends down testing, electronic length fixing, frequency control and automatic uplift of yarn bobbin on yarn break and full bobbin occasions by application of pneumatic technology
電子斷頭檢測，電子定長，變頻調速，在斷紗和滿筒子時，應用氣動技術紗筒自動抬升 -
Automatic frequency fine control pull - in time
自動頻率微調捕捉時間 -
Alfc automatic load frequency control
自動裝入頻率控制 -
Automatic frequency fine control pull - in range
自動頻率微調捕捉范圍 -
Afrc, automatic frequency ratio control
周波數比率制御方式 -
Automatic frequency fine control afe
自動頻率微調 -
This subject aim at designing a linear power amplifer whose output power is 40w for 225 - 450mhz band. but it seems not easy to finish the task because of this power amplifier own unique requirements including high output power, broad working frequency band, high linearity, and flat gain. due to the complexity involved, theoretically several soltuions are derived in the final scheme such as broadband matching technology, power - retreat, power synthesize, automatic power control and negative feedback. in addition, the design will be optimized by eda software and the final test result indicates that our design is successful
本課題的目標是研製一個輸出功率為40w的225 450mhz的線性功率放大器。由於該功放要求輸出功率大，工作頻帶寬，帶內增益波動小，線性度高，所以其終合設計難度大。鑒于這個原因，在理論設計上筆者採用了寬帶匹配、功率合成、功率回退、負反饋、自動功率控制等技術；在實踐中精心設計電路，並且配合eda軟體模擬，最終達到所要求的指標。 -
With the aid of these blocks, it is convenient and flexible to make up different kind of automatic - controlled simulating system and so to accomplish different kind of automatic adjusting task. this paper is focused on the construction of the simulation model of ccs by using the contrived control section model. the ccs employs advanced direct energy balance control strategy and can simulate different running patterns such as turbine following boiler pattern, boiler following boiler pattern, etc. two independent control loops : power control and frequency control, are used in the contrivance of deh and they are separately corresponding to the normal condition and the abnormal condition
本文利用開發的控制環節模塊，著重建立了協調控制系統的模擬模型，該協調控制系統採用了先進的直接能量平衡控制策略，並能模擬機跟爐、爐跟機、機爐協調、手動以及定壓和滑壓等運行方式；開發的功頻電液系統模型採用了功率控制和頻率控制兩個獨立的控制迴路，能夠在機組正常運行和啟停時對汽輪機進行控制。 -
2. as for the intermediate frequency part in integrated circuits ( ic ' s ), we introduce feedback automatic gain control ( agc ) loop in view of its fargoing dynamic range and convenient precision adjustment, hence stable power of fore - demodulator signal and maximum systematic gain are ensured
2 、中頻部分採用集成電路的反饋式自動增益放大環路，動態控制范圍大，控制精度調節簡便，是系統增益的最大來源，同時也保證了中頻解調器前信號的功率穩定。 -
Automatic frequency control af
自動頻率控制 -
Automatic frequency control
自動頻率控制 -
The algorithm of cross product automatic frequency control ( cpafc ) and frequency bin technology is used for tracking larger frequency deviation. the paper gives out a scheme of digitized carrier synchronization loop, in which the digitized costas loop is used as a basic part while cpafc and frequency bin technology as auxiliary
在此基礎上提出了數字化、軟體化的載波同步環路演算法方案，主要採用數字化科斯塔斯環的形式，並加以自動頻率跟蹤演算法和頻率開槽技術的輔助來實現載波同步。
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