脈波調制 的英文怎麼說

中文拼音 [màibōdiàozhì]
脈波調制 英文
modulation; pulse
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 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...
  1. 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。
  2. The subject inducts digital time division technology ( pwm ), which is more advantageous at the accuracy and the predigest of hardware than simulant multiplication. what they call measuring power energy reasonably is that measuting except harmonics power energy fed back power. yet it realizes reasonable measurement of power energy which measures by base wave ac parameters method base on digital time division

    本課題引入了數字時分割（ pwm ）脈寬調制技術，在測量的準確性、硬體電路的簡化等方面都比模擬乘法器具有較高的優越性。所謂合理的計量電能，就是不計非線性負載回饋給電網的負的諧波電能，而採用基於數字時分割的基波交流參數測量的方法，真正實現了電能的合理計量。
  3. 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。
  4. Firstly, according to the detailed analysis on the mathematical model of pmsm, the principle of field oriented control ( foc ) is illustrated. spwm and svpwm are analyzed and contrasted in detail too, and the digital realization techniques based on dsp are given

    本文首先在分析永磁同步電機數學模型的基礎上，闡述了永磁同步電機矢量控制基本原理；對正弦波調制技術（ spwm ）和空間矢量調制技術（ svpwm ）兩種脈寬調制策略進行了詳細的分析和對比研究，給出了基於dsp的數字化實現方法。
  5. The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits

    該系統能產生三相六路正弦脈寬調制（ spwm ）波形;調制頻率范圍為0 4khz ，分7級控制; 16位的速度控制解析度;載波頻率分8級控制，最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確，易修改，可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點，可應用於pwm變頻調速系統的全數字化控制。
  6. The spwm algorithm using symmetrical sample in this controller, can alter its frequency and amplitude. the good performance of the bldc motor controller using dsp is verified by the experiment

    本文在分析了幾種spwm調制方法的基礎上，將基於對稱采樣法的spwm調制演算法應用於本設計中，產生了可調頻調幅的正弦波脈寬調制信號。
  7. Step power is the key for step magnetic potential, the pulse width modulate technology that selects the triangle wave as the carrier and ladder sine wave as the modulate wave is researched, furthermore the design of the actuator drive adopts dsp as the digital controller is introduced

    步進電源是產生步進磁勢的關鍵，文章研究了三角波為載波，階梯正弦波為調制波的脈寬調制技術，進而介紹了採用dsp組成全數字控制器，完成步進電源觸發的執行器驅動器的設計。
  8. According to the mechanism characteristics of the ac motor, with zero - voltage switching technology, the pdm converter mathematical models both the pwm and rectangular wave control mode are given in this paper. and the voltage and current harmonic analysis and the simulation waveforms of the output voltage, current and power are also described respectively

    根據交流電機在恆轉矩區和恆功率區的特性，結合零電壓開關技術，分別給出相應的脈寬調制控制（ pwm ）方式和方波控制方式下的高頻交流脈沖密度調制變頻器的數學模型，電壓和電流的諧波分析以及輸出電壓、電流和功率的模擬波形。
  9. （ 2 ） the major circuit has been established, composed of rectifier 、 buck - chopper 、 push - pull inverter and matching network, which realizes high - power supersonic ac output. to achieve maximal output power, the pulse frequency modulation ( pfm ) has been applied to auto - adjustment of output frequency, which corresponds to the load ' s resonant frequency

    （ 2 ）建立了超聲電源主電路，其中包括：整流、直流斬波、推挽逆變器和匹配網路等部分，實現了大功率超聲頻交流電的輸出，輸出頻率的脈頻調制（ pfm ）和輸出功率的脈寬調制（ pwm ） 。
  10. Unlike inverters for general purpose, auxiliary inverters of subway vehicle have the characters of high power, wide range of high dc input voltage, entirely sealed electronic units and natural cooling. single pulse width modulation ( pwm ) technology is found to be optimal by comparing several different high power inverter technologies and is utilized in the 2 - channel staircase inverter discussed in this thesis

    針對地鐵車輛輔助逆變電源的大功率、直流側輸入電壓高且變化范圍寬、輸出電壓穩定且波形質量高，電子部件全密封且要求自然冷卻的特點，分析比較了幾種大功率逆變器技術方案，選擇單邊脈寬調制階梯波合成逆變器為研究對象。
  11. The author designed and developed a single phase mid - frequency inverter control unit, which is based on dual micro - processor system. the inverter is modulated by pre - set spwm pulse width wave

    本文研製出一種基於雙微處理器（ mpu ）控制的單相中頻逆變電源控制裝置，逆變電路基於開關預置spwm波脈寬調制。
  12. In the design, the diode of agilent ' s hsch - 9161 is used. with the diode circuits in parallel, the millimeter - wave short pulse detector has been designed. it works at the frequency of 37 to 38ghz, and the pulse duration is 400ps

    本文採用agilent公司的hsch - 9161檢波二級管，選取二極體並聯檢波電路形式，完成了工作頻率為37 ~ 38ghz 、脈沖寬度為400ps的毫米波短脈沖檢波器的研製，同時設計了一個毫米波短脈沖調制器。
  13. According to the space vector modulation method of the equivalent structure of the ac - dc - ac transformation, the transformation relations of the matrix converter are deeply investigated. the ac - ac direct conversion control and the double - space - vector pwm scheme of the matrix converter are deduced, the four - step current commutation strategy of matrix converter is expatiated, the design method of input filter and over voltage protection circuit is analyzed, and the modeling and simulation of a three - phase matrix converter are implemented

    從等效交-直-交變換的空間矢量調制方法出發，深入分析了矩陣式變頻器的變換關系，導出了交-交直接變換控制規律和雙空間矢量脈寬調制技術，闡述了矩陣式變頻器的換流控制策略，分析了輸入濾波器和過電壓保護電路的設計方法，實現了矩陣式變頻器的建模和運行分析。
  14. Firstly, the basic theory of switch reluctance generator ( srg ) is discussed in detailed, based on the mechanism electric energy converting analysis, non - linear analysis and non - linear simulation. three control methods of srg ( angle position control method, current chopping control method, pulse width modulation control method ) are deeply studied and analyzed. the electronic controller, which controlled by dsp or by hardware circuit are developed for low - power switched reluctance generation system

    首先系統地研究了開關磁阻電機發電運行的基本理論，從機電能量變換的角度分析開關磁阻發電機的機電能量變化規律；通過非線性分析和非線性模擬方法，明晰開關磁阻電機發電本質，概括出開關磁阻電機發電運行的特點；系統、深入地研究了開關磁阻電機發電運行的控制方案（角度位置控制、電流斬波控制、脈寬調制控制） 。
  15. The driving circuit was designed. 5. on the control mode, the pwm wave produced by mcu to control the dcmotive

    在控制方式上，採用單片機的定時中斷，產生脈寬調制波，對直流電動機進行控制。
  16. The performance of the electric vehicle is improved greatly in which the harmonic wave of output voltage, power loss and torque pulsation of the system are decreased by controlling the switch angles

    它運用規則采樣法產生正弦脈寬調制波，通過開關角的控制抑制逆變器輸出電壓中的諧波分量，降低了電動機的損耗和轉矩脈動，使電動車的運行性能得到了較大改善。
  17. This paper studies on used the ac servo system based on ti dsp ( lf2407a ) and the foc and digital signal processing thorem, achieves following results : algorithm. we employ svpwm ( space voltage pwm ) algorithm, improve the efficiency of the electric source, and decrease the harmonious elements. we build the mathematic model of the system and simulate it on matlab platform, dsigne segmented pid regulator to adapt variable speed and widen the speed range. measurement. the velocity and electric current measuring, we adopt multi - sampling - rate and digital filter principles. as more improvements we make, the whole system gets a good results. pc control. the complete controlling system can be controlled remotely. so we develop the pc controlling program.

    採用磁場定向脈寬調制演算法，提高了電源利用率，降低了逆變電壓的諧波，改善了電機的運行特性，降低了對電網的污染；在matlab平臺上建立了交流永磁同步伺服電機和電壓空間矢量脈寬調制控制系統的數學模型，在模擬的基礎上，對傳統pid調節器進行了改進，提出轉速調節器和電流調節器採用分段pid結構，根據給定轉速所處的區間，自動選擇相應pid調節器的參數，拓寬了調速范圍，提高了控制精度。
  18. The volume of the output filter can be reduced greatly used in cascade inverter with carrier - phase - shifted spwm technology which has a high equivalent switching frequency and a good output sine wave. it is the base of the high power density of asi

    載波移相正弦脈寬調制技術有獨特的消諧波優勢，其等效開關頻率高，輸出波形正弦度好，可以大幅減小濾波器體積，為實現系統的高功率密度奠定基礎。
  19. The forming mechanism of crosstalks in the tdm system was analyzed theoretically, and the relationship between crosstalks and the extinction ratio of optical pulse modulator used in the tdm system was investigated. the interchannel and intrachannel crosstalks in the wdm system were discussed separately, and the contributions to crosstalks were appraised from architecture ’ s alteration, the finite isolation between channels in multiplexers or demultiplexers, and nonlinear effects in the system. noises in the large - scale multiplexing system were studied theoretically, and all kinds of factors were considered that have relation to noises, phase resolution, and dynamic range of the system, such as multiplexing channel number, the length of the transmission fiber, using in - line erbium - dropped fiber amplifiers or not, and so on

    本文從理論上分析了光纖水聽器時分復用系統串擾的形成機理，分析了光脈沖調制器的消光比與系統串擾的關系;分別對光纖水聽器波分復用系統的異頻串擾和同頻串擾進行了理論分析，研究了光纖水聽器波分復用結構、波分復用器與解復用器隔離度等因素以及非線性效應對系統串擾的影響;對大規模光纖水聽器復用系統噪聲進行深入細致的理論分析，研究了系統噪聲、相位解析度、動態范圍與復用數目、傳輸光纖長度、中繼光纖放大器等諸多因素的關系。
  20. The sine wave pulse width modulation ( spwm ) is used to reduce the wastage and the noise of the motor more effectively, as comparing to the equal pulse width modulated pwm

    相對于等寬脈寬調制pwm ，正弦波脈寬調制spwm可以有效地降低電動機的損耗和噪聲。
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