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drive pulse 【無線電】驅動脈沖。

drive shaft

Some simulations with deltae has also been made to predict the performance of the system . at the end of this section , proposals and schemes are also given for the further experiments . 4 ) thermoacoustically driven puke tube refrigerator ( tadptr ) with the successful operation of the standing wave thermoacoustic prime mover , we transferred part of our efforts to the thermoacoustically driven pulse tube refrigeration , which is actually the original aim for our study on the thermoacoustic prime mover 熱聲驅動脈管制冷機在成功研制熱聲驅動器的基礎上,對其與脈管制冷機(一種在低溫端沒有運動部件的新型的低浙江大學博士學位論文金滔:熱聲驅動器及其驅動的脈管制冷研究2001年5月溫制冷機)的聯接進行了匹配分析,并搭建了熱聲驅動脈管制冷機的實驗臺,進行了系統的實驗研究。

This paper presents a method that chopping wave is done by switch devices which consist of three - level resistance regulating module and intelligence power module ipm , and which realizes constant - current discharge of storage battery . to achieve the intelligence control of the drive protection and the discharge process of ipm , the paper designs circuit formed by igbt threshold drive pulse pwm signals . ipm fault - blocking protection circuit and microcomputer 80c196 . the devices can accurately control the 0 ~ 150a discharge current and the discharge time of the storage battery and calculate the releasing power 實現蓄電池恒流放電過程智能控制是蓄電池放電裝置發展的必然趨,本文提出了一種通過三極電阻調節模塊和由智能功率模塊ipm為開關器件進行斬波從而實現蓄電池恒流放電的方法。為達到對ipm的驅動保護和放電過程的智能控制,文中設計了igbt門極驅動脈沖pwm信號形成電路和ipm故障封鎖保護電路及由單片機80c196為核心的微機控制器。本裝置能夠對蓄電池進行0 150a放電電流及放電時間的精確控制及釋放容量的計算。

This paper describes an automatic contest robot from the cctv holding “ the first robot tv contest all over the academician ” , describes the function and the realization of the robot in greater detail . the robot adopts two stepper motors in the stepped driving control system and putting - ball control system like fishing , with the control of at89c52 single - chip microcomputer , it can synchronously produce driving pulse for two stepper motors and control the moving of the robot along the predetermined line 該競賽機器人采用步進電機作為行走驅動,釣魚桿式的放球控制系統,在at89c52單片機的控制下,分別為左、右步進電機產生脈沖,控制機器人按照預設的固定路線行走,待機器人到達預定的目標位置后,同時控制多個放球機構,從而能分別將賽球準確地放入到比賽圓筒中。

The system comprises three modules : the first is the ccd driver module , which controlled with cpld . programming the cpld to produce ccd driving pulses and synchronized communication signals . after preprocessing , the output video signals are transmitted into high resolution adc module , in which they are converted into digital signals , and then processed in arm processing module 整個系統分為三個模塊: ccd驅動模塊的核心是一片復雜可編程邏輯器件( cpld ) ,對其編程產生ccd的驅動脈沖及同步控制信號;視頻輸出信號經預處理后,由高精度ad轉換模塊進行采樣,將ccd輸出的模擬信號轉換成數字量;最后,將數據送入arm處理系統中進行后續處理。

After reviewing the history and recent developments of the research on thermoacoustics , and introducing the classical thermoacoustic theory , we carry out the following investigations : 1 ) thermoacoustically driven pulse tube refrigerator ( tadptr ) experiments have been done on the self - built pulse tube refrigerator driven by standing wave thermoacoustic prime mover system 本文首先回顧了熱聲機械的歷史及現狀,詳細介紹了熱聲學理論基礎,重點研究了以下若干問題: 1駐波型熱聲驅動器驅動脈管制冷機在自行搭建的駐波型熱聲驅動脈管制冷機實驗裝置上進行了實驗研究。

In the next place , by studying the change of the resonant frequency of the whole system , this paper designs the circuit to track the resonant frequency of the system by cd4046 mainly . at the same time , in order to improve the efficiency and get better dynamic capability of the converter , we choose pll and fuzzy control after comparing the pll circuit , fuzzy circuit and pll ? fuzzy control circuit . in the end , this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter , using the dsp chip as the key part to realize four routes of pwm drive pulses with dead band of the control system 其次,通過對整個系統諧振頻率變化的分析和研究,設計了以鎖相環cd4046為核心的鎖相環控制電路,同時,在綜合比較鎖相環控制、模糊控制以及模糊控制和鎖相環復合控制三種控制算法的基礎上,進行了系統仿真,得出采用復合控制可使跟蹤電路既具有鎖相環路較好的穩態性能,又擁有模糊控制較好的動態性能,系統魯棒性能好,同時也提高了逆變器的效率。

Recent experiments have succeeded in obtaining oscillations from the new system , with frequencies of 66hz and 23hz for the cases with helium and nitrogen as the working fluids , respectively . the traveling wave system is expected to be one of the good candidates as a driver for pulse tube refrigerator , leading to a thermoacoustically driven pulse tube refrigerator without any moving component 還利用deltae對環路部分進行了數值模擬分析,著重討論了系統的起振臨界溫度與臨界加熱功率、效率與加熱溫度的關系、噴射泵的作用以及不同工質(氮氣和氦氣)的比較等,得出一些有益的結論。

The last part of the thsis presents a novel fast response digital variable optical attenuator . this device is driven by two electromagnetic driving units rather not stepper motors . a wide attenuation ( 40db ) was fully digitized and can be set by a certain number of driving pulses 論文最后針對現有數字可調光衰減器均由步進電機驅動,體積龐大,造價高昂且速度緩慢的缺點,利用微反射單元設計了一種高速數字式可調光衰減器。

A thermoacoustically driven pulse tube refrigerator capable of using low - qualified heat source 可利用低品位熱源的熱聲驅動脈管制冷機

Optimization of drive pulse configuration for transient ne - like fe x - ray laser 射線激光抽運脈沖結構的優化計算