隨動變壓器 的英文怎麼說
中文拼音 [suídòngbiànyāqì]
隨動變壓器
英文
follow-up transfomer-
Based on the hydrodynamic energy transport model, the influence of variation of negative junction depth caused by concave depth on the characteristics of deep - sub - micron pmosfet has been studied. the results are explained by the interior physical mechanism and compared with that caused by the source / drain depth. research results indicate that with the increase of negative junction depth ( due to the increase of groove depth ), the threshold voltage increases, the sub - threshold characteristics and the drain current driving capability degrade, and the hot carrier immunity becomes better in deep - sub - micron pmosfet. the short - channel - effect suppression and hot - carrier - effect immunity are better, while the degradation of drain current driving ability is smaller than those with the increase of depth of negative junction caused by source / drain junction shallow. so the variation of concave depth is of great advantage to improve the characteristics of grooved - gate mosfet
基於能量輸運模型對由凹槽深度改變引起的負結深的變化對深亞微米槽柵pmosfet性能的影響進行了分析，對所得結果從器件內部物理機制上進行了討論，最後與由漏源結深變化導致的負結深的改變對器件特性的影響進行了對比.研究結果表明隨著負結深（凹槽深度）的增大，槽柵器件的閾值電壓升高，亞閾斜率退化，漏極驅動能力減弱，器件短溝道效應的抑制更為有效，抗熱載流子性能的提高較大，且器件的漏極驅動能力的退化要比改變結深小.因此，改變槽深加大負結深更有利於器件性能的提高Shanghai xingzhong transformer limited company is the profession produces the profession business enterprise of various transformer, having obtained the iso9001 quantity management system attestation. the sg that company produce - three concern with type transformer, dg - single mutually transformer, bk - bkc - jbk3 series control transformer, qzb - three decline to press to start mutually to pound at transformer etc. product from the transformer of and neon lights, wear the knife for the domestic and international customer broadly, parts of products is already to export the overseas with the customer
上海興中變壓器有限公司系專業生產各類變壓器的專業企業，已經取得iso9001質量管理體系認證。公司生產的sg -三相干式變壓器dg -單相變壓器bk - bkc - jbk3 5系列控制變壓器qzb -三相降壓啟動自耦變壓器及霓虹燈沖擊變壓器等產品，廣泛地為國內外用戶配套，部分產品已隨用戶出口海外。There is difference frequency measurement requirement for every part of pid regulating, difference between dynamic quality and static quality in response time and accuracy. according to these, it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed, the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed, an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor. according to the drive character of five phase of response step motor, a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor
本文利用s7 - 200plc自身的特點設計了頻率測量單元，根據pid調節各個環節的特點，以及調速器動態特性、靜態特性對頻率測量的實時性和精度要求的不同，利用s7 - 200plc基本單元中內置的高速計數器以及相應的外圍放大整形、分頻電路，實現了水輪發電機組頻率的測量；在軟體上，對微機調速器的整個程序框架、並聯pid的離散化過程進行了分析，選用改進的pid演算法實現了變參數、變結構的pid調節模式；調速器的機械液壓隨動系統具有步進電機電液轉換元件，採用五相反應式步進電機，根據其驅動特性設計了變頻調壓驅動器，實現plc與步進電機驅動器之間數字介面。The pt secondary loop voltage drop is a changing amount and has the characteristics of indirection and certain randomness. the second, according to the cause of pt secondary loop voltage drop, the different methods to reduce the pt secondary loop voltage drop were analyzed and the conclusions are draw as below : 1. changing bigger section wire and maintaining the connector plugs regularly can reduce the pt secondary loop voltage drop effectively, but ca n ' t guarantee which meets the relevant rules
首先，通過對電壓互感器二次壓降的形成機理進行分析，得出以下關於二次壓降的相關結論： 1 、電壓互感器二次壓降等於二次迴路阻抗和迴路電流的乘積； 2 、電壓互感器二次迴路阻抗分為元器件自身阻抗和接觸阻抗兩部分，且接觸阻抗佔主要部分，從而使得電壓互感器二次迴路阻抗具有動態特性，而且具有一定的隨機性； 3 、電壓互感器二次迴路電流與二次負荷和迴路阻抗大小相關，因而二次迴路電流也是變化的； 4 、電壓互感器二次壓降是一個變化量，且具有單向性和一定的隨機性。Abstract : the rechargeble batteries are used for backup power internal electrically equipments and instruments. but batteries lifetime usually is shorten by overwork and then malfunctions of equipment are induced. to avoid the complexion described above, the protection circuit against overwork is designed. it is based upon the voltage comparator and regulator. it will light up a red led when the volume of the batteries discharged close upon 50 % ; it will switch off the load automatically when it discharged closing to 80 % of their energy capacity, thus overwork of batteries can be avoided and lifetime may be extended
文摘:用蓄電池做后備電源的系統（或設備） ，常因過放電導致電池提前報廢而造成設備故障.根據電池電壓隨容量變化的規律，利用電壓比較器和電壓基準源設計製作了電池放電保護電路，當電池放電量接近容量的50 %時，啟動預警信號；當電池放電量達到容量的80 %時，電路自動切斷負載，防止電池過度放電，延長電池壽命，保證系統（或設備）在供電恢復正常后能正常運行The results show that the elastic membrane thickness, actuator span and gap spacing have a strong effect on the deflection, the actuator undergoes the deflection increasing nonlinearly at voltages below pull - in voltage and snap through instability at voltages above pull - in voltage when subjected to a voltage ramp, the re - set time and repeatability are attractive when the actuated voltage is set to zero
結果表明，驅動器的彈性薄板厚度、跨度和電極間距明顯影響變形位移；驅動器的變形位移隨驅動電壓的增加出現穩定的非線性增加和不穩定的「拉入」現象；驅動電壓撤除后鏡面回復時間短，重復性好。However, when the actuator, which is made of piezoelectric ceramics, is bonded on a structure, it may influence some of the specimen ' s physical parameters, such as elastic modual. so the induced strain field is influenced. and the extent to which the parameters are influenced depends on the size of the actuator
然而，壓電陶瓷驅動器粘貼于試件表面時，會對試件的彈性模量等物理參數有所影響，進而影響到整個誘發應變場，隨著壓電陶瓷驅動器尺寸的變化，影響的程度也跟著變化；而且為了達到良好的控制效果，往往需要在不同的位置粘貼多片壓電片，這些問題都使得掌握粘貼型壓電驅動器的誘發應變場的位移圖及其尺寸變化對誘發應變場的影響成為必要。Power bond graph is used to established the bond graph model of the lifting and dropping of hydraulic pile hammer and state space equation in the paper for hydraulic pile hammer is perplexing nonlinear system. in order to attain the graph that pressure, position, velocity, acceleration vary with time in the course of driving pile simulation procedure solving state space equation is designed on the basis of combining four - order runge - kutta method with predicator - corrector method, dynamic simulation of the hydraulic system is studied in matlab 6. 5. it is convenient to analyse dynamic characteristics of the hydraulic syste m, beneficial to the design and parameter optimization of the hydraulic system. in the final part of the paper, under detailed analysis of the control characteristics for double - acting hydraulic pile hammer with double cylinders, control system based on the programmable logic controllers founded on technology of modern compute is designed
由於液壓打樁錘液壓系統是一個復雜的非線性系統，本文採用功率鍵合圖法建立液壓打樁錘上行、下降的鍵合圖模型和狀態空間方程，通過四階龍格?庫塔法和預估?校正法相結合編制了模擬程序對狀態空間方程求解，在matlab6 . 5中進行液壓系統的動態模擬，獲得液壓打樁錘運動過程中壓力、位移、速度、加速度等隨時間變化的曲線圖。此曲線圖方便了對液壓系統動態特性分析，為液壓系統的設計和參數優化提供了有益的借鑒。最後，在深入分析雙缸雙作用液壓打樁錘控制系統的功能要求后，採用了以現代計算機技術為基礎的新型工業控制裝置? plc可編程式控制制器，設計出了雙缸雙作用液壓打樁錘的電器控制系統。Regarding the accumulator to start motive force urgency treating the maintenance with maintaining, our factory is for suiting the needs of society to swift and violent development and extensive use along with automobile, motorcycle as well as agriculture with the car, by way of the constantly improvement to the old style battery - charging unit, producing out " full active protection battery - charging unit of computer ", it has collected to fill and the all direction protection such as flows and joining versely etc in an organic whole, being compared with the ordinary battery - charging unit, it adopts the ring mould transformer of high quality high efficiency, possesses that to bear the weight the current strong, grows in service life etc the characteristic, can make the accumulator 2 - 3 lengthening life span times
隨著汽車、摩托車以及農用車的迅猛發展和廣泛應用，作為啟動動力的電瓶急待維護和保養，我廠為適應社會的需要，通過對老式充電機的不斷改進，生產出「電腦全自動保護充電機」 ，它集過充、過流、反接等全方位保護於一體，與普通充電機相比，它採用優質高效的環型變壓器，具有承載電流強，使用壽命長等特點，可使電瓶延長壽命2 - 3倍。In the dissertation, the response characteristics of capacitive accelerometer whose sensing and driving combs have small angles of decline for step and shock signals are deeply researched for different driving voltage configurations. the dependences of the critical time of the pulse signal and the critical step signal for the different configurations and different angles of decline are developed
本文深入研究了梳齒小角度傾斜的電容式傳感器，不同驅動電容配置下受到脈沖加速度信號和階躍加速度信號作用時的響應特性，得到了在不同驅動電容配置，不同傾斜角度情形下的臨界脈沖可持續時間和最大階躍加速度信號隨驅動電壓的變化曲線。Currently most domestic break - test - plateform adopt the liquid - pressure - servo technique, which possesses the advantages of higher frequency - response and higher controlling exactness, but in the same time, the disadvantages of higher cost, variation of function with the change of oil viscousness produced by the fluctuation of temperature. moreover, the liquid - pressure system is sensitive to the pollution of oil, so it is necessary to take protective and filtrating steps
目前，國內的制動器試驗臺大多採用的是液壓伺服控制，這種控制具有響應頻率高、控制精度高等優點，主要缺點是系統成本高、油液粘度隨溫度變化引起工作性能的變化、且液壓系統對油液的污染比較敏感，必須要有良好的保護和過濾措施。In the recent years, a new smart damper, magnetorheological ( mr ) damper, is developed for vibration control, which is made of smart mr fluid. mr damper has an excellent variable damping property and its damping force can be changed by adjusting voltage applied to damper. therefore, semi - active control can be implemented with the damper
近年來，一種由高科技亞納米材料?磁流變體製成的磁流變智能阻尼器（ magneto - rheological （ mr ） damper ）問世並用於實際工程減振，該阻尼器的阻尼特性隨輸入電壓的變化而改變，具有良好的可變阻尼特徵，可實現半主動控制。Finally, the two dimensional flow in the diffuser is calculated, the results show that the change of ma makes an effect to the performance of the diffuser. owing to the accretion of ma, the action of oblique shock waves and the boundary layer pricks up, the flow separates from the wall where the shock waves impinge on the boundary layer more quickly, the cluster of diamond shock waves becomes larger. moreover, by comparing the change of flow field under different structure parameter, it is found that the augment of length of constant area section alter the structure of fluid field little, a smaller area ratio and larger angle of compression section make the diffuser working better
最後，針對擴壓器中的二維流場進行了數值模擬，結果表明馬赫數對擴壓器性能影響較大，隨著馬赫數的增大，擴壓器管道內激波-附面層干擾加劇，流動從附面層分離相應加劇，激波串數目增多;通過比較不同結構參數下的擴壓器內流場，發現等直段長度的變化幾乎沒有改變流場結構，只是對局部流場稍有影響，並且在其它參數不變的情況下，一定范圍內減小面積比a2 / a1和增大收縮角有利於擴壓器性能的提高。With the rapid development of power industrial in our country, the protectiondevice for transformer whether can exactly, timely, reliably act, which is one of animportant factor for power grid to guarantee running securely in modern electricsystem
隨著我國電力工業的迅速發展，在現代電力系統中，變壓器保護裝置能否準確、及時、可靠的動作是保證電網安全運行的關鍵因素之一。With the theory of wavelet transform and reversible integer - to - integer wavelet transforms based on shifting frame used in image / video compression field introduced, a new real - time implement of speck algorithm using dsp chip is provided. then the technology of motion estimation and motion compensation is discussed and an adaptive technique for the wavelet video codec to reduce the " block artifact " is presented. and the implement of the wavelet video compression system using adv611 chip is discussed next with the performance emulation result
在系統討論了小波理論在圖像視頻壓縮編碼領域的應用后，結合dsp技術提出一種基於dsp應用的實時低存儲需求的改進speck圖像編碼器；隨后探討基於小波變換的實時視頻編碼器的實現，在論述運動估計與補償技術的基礎上，針對應用空域運動估計補償技術的低比特率小波視頻編碼器提出一種自適應消除塊效應的技術；並討論了基於adv611晶元的視頻壓縮系統的壓縮性能；最後提出一種基於dsp平臺具有極低時延的小波視頻混合編碼方案，對該方案的壓縮性能進行了討論並給出初步的硬體實現方案。分享友人