U - usm 中文 - EN166

usm 短語和例子USM ＝1.underwater-to-su...

usma
The proposed driving circuit includes a low - pass filter circuit 、 feedback circuit 、 signal generated circuit 、 phase shifted circuit and power inverter circuit . a ti cooperation ' s dsp ( tms320lf2407a ) is chosen for the drive and control system based on the characteristics of usm , the interface circuit 、 each function ’ s flow chart and algorithm program are designed 根據usm的特點,選取一款專用于電機控制的dsp芯片tms320lf2407a ,設計了硬件接口電路、各功能部分的流程圖及控制算法程序,以ccs為編譯環境,進行電機整個控制系統的軟件編寫與調試。
In this paper , a farther study and design on drive and control of usm is made . according to usm ’ s characteristic and it ' s driving theory , a new kind of usm ’ s drive and control circuit is designed , it is used to realize frequency tracking and drive usm , an algorithm using bp neural network is selected for the system 文中根據usm的特點,設計了一種新型的驅動電路用來實現電機的頻率自動跟蹤及驅動電機的運轉,并采用了智能控制理論中的bp神經網絡算法,利用數字信號處理器( dsp )的運算能力強、精度高、速度快等特點,實現了一個超聲波電機的驅動控制系統。
Being a sort of new principle micromotor in the fronitier of science . the ultrosonic motor ( usm ) is developed at recently twenty years . utilizing the stator surface particle elliptical motion excited by piezoceeramics , the usm is drived by friction force between the stator and rotor . compared with the conventional electromagnetic motor , the ultrasonic motor has the following features : high speed , high holding torque when power is off and so on . because of it ' s characteristics , the ultrasonic motor has obtained some widespread application in robots , precise instrument , house electronical appliance , sapceecraft automobile and micromechanism 超聲波電機( ultrasonicmotor )是近二十年來發展起來的一種新原理電機，其原理不同于傳統的電磁型電機，它是利用壓電陶瓷的逆壓電效應使定子的表面質點產生橢圓運動，通過定子和轉子之間的摩擦力驅動轉子運動。這種新型的電機與傳統電磁電機相比，具有響應快、不受電磁干擾、結構緊湊、低速、大扭矩、斷電自鎖等優點，因而在微型機械、機器人、精密儀器、家用電器、航天器、汽車等方面顯示出廣泛的應用前景。
The application of bp neural network to speed control system on usm is discussed , and a program is designed for training the bp neural network by matlab ’ s nntool , a three layers neural network of 2 - 8 - 1 is determined through simulation , then write the weights and biases of the nn into dsp to make on - line training , and it reaches the purpose of controlling usm ’ s speed 利用matlab7 . 0中的神經網絡工具箱進行結構設計和離線訓練,通過仿真實驗最終確定了2 - 8 - 1的三層網絡結構,將訓練后得到的權值、閾值結果寫到dsp中,進行控制過程中給定速度的在線訓練,從而達到控制電機轉速的目的。
The influences of stator ' s teeth on vibrating modal of the linear standing wave usm are discussed in this paper , in which eigenfrequency and wave - shape are analyzed while the position and geometry dimension of stator ' s teeth are changed , and it can give some advice on design for standing wave linear ultrasonic motor 摘要本文對一類直線型駐波超聲電機振子的振動模態進行了系統的分析，討論了定子齒的位置、幾何尺寸對直線型超聲電機的固有頻率、振型的影響，為該類駐波型直線超聲電機的設計提供了理論依據。
When the travelling wave ultrosonic motor ( tusm ) ' s structure is determinated , it ' s peoformance will be lie on drive and control strategy . according to tusm ' s characteristic and it ' s driving theory , a kind of usm ' s driver and control strategy is designed in this paper , which is based on digital singal processor ( dsp ) 本文針對行波型超聲波電機的特點，以及行波型超聲波電機驅動的特點和要求，在對行波型超聲波電機的驅動控制系統進行了深入研究的基礎上，設計了一套基于dsp的簡單可行的驅動控制系統。
The program of whole control system is testing on the plat of ccs . a usm drive and control system based on dsp is designed , the results show that the instrument is efficient and accurate , and run stably , so it can realize drive and control of usm better 搭建了一個基于dsp的usm整體驅動控制系統,對系統進行測試實驗,實驗結果表明:本系統運行穩定、響應速度較快,能夠較好的實現usm的驅動及調速控制。
Being a sort of new principle micromotor in the fronitier of science , the ultrasonic motor ( usm ) is developed at recently twenty years . utilizing the stator surface particle elliptical motion excited by piezoceeramics , the usm is drived by friction force between the stator and rotor 本文以這一新型電動機為研究對象，對其運行特性和控制策略進行研究，是有較重要的理論和實際意義的。
According to tusm ' s characteristic and it ' s driving theory , a kind of usm ' s driver and control strategy is designed in this paper , which is based on digital singal processor ( dsp ) . the main work accomplished is summarized as follows 設計了兩相混和式電動機的控制軟件，實現了電機轉速的開環控制，并同時給出了實驗結果，并對實驗結果進行了分析，驗證了上述仿真結果的正確性。
In tins paper , a new type of standing - wave linear usm with square - ring vibrator was presented , which had two contact surfaces and a support structure with four flexure hinges for the power output 摘要利用有限元分析軟件對方環形直線駐波超聲波電動機的振子進行了動態設計，提出了一種環梁式雙接觸面的振子結構，該振子采用柔性鉸鏈與支撐結構連接，實現力的輸出。
This system is implemented on a dsp because the dsp is accuracy and efficient . on basis of referring and analyzing a large quantity of literatures , the following work has been carried out 本文在閱讀和分析了大量國內外有關參考文獻的基礎上,做了以下研究工作:介紹了bp神經網絡在usm速度控制系統中的應用。
A 180mm lens is getting long for portraits and the canon ef 180mm f / 3 . 5 l usm macro lens ' slow focusing might have an impact here as well 而180拍人像則顯得略長了一些，同時180緩慢的對焦速度也不很適合人像拍攝。
A new kind of driving circuit is designed , it realizes driving and frequency tracking of usm 本文研究并設計了一種新型的驅動電路,用以實現超聲波電機的驅動和頻率的自動跟蹤。
Another negative attribute of the canon ef 180mm f / 3 . 5 l usm macro lens is its slow focus speed 另外一個180的弱點是它有極其慢的對焦速度。
Research on the design of firewall management system based on usm 的防火墻管理系統的研究與設計
New generation method of pencil drawing using usm sharpening 銳化生成鉛筆畫的新方法