usm造句

• New generation method of pencil drawing using usm sharpening
  锐化生成铅笔画的新方法
• Usm unlisted securities market
  为挂牌上市证券市场
• Another negative attribute of the canon ef 180mm f / 3 . 5 l usm macro lens is its slow focus speed
  另外一个180的弱点是它有极其慢的对焦速度。
• A new kind of driving circuit is designed , it realizes driving and frequency tracking of usm
  本文研究并设计了一种新型的驱动电路,用以实现超声波电机的驱动和频率的自动跟踪。
• 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拍人像则显得略长了一些，同时180缓慢的对焦速度也不很适合人像拍摄。
• 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
  本文在阅读和分析了大量国内外有关参考文献的基础上,做了以下研究工作:介绍了bp神经网络在usm速度控制系统中的应用。
• 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软件对方环形直线驻波超声波电动机的振子进行了动态设计，提出了一种环梁式双接触面的振子结构，该振子采用柔性铰链与支撑结构连接，实现力的输出。
• 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
  设计了两相混和式电动机的控制软件，实现了电机转速的开环控制，并同时给出了实验结果，并对实验结果进行了分析，验证了上述仿真结果的正确性。
• 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
  本文以这一新型电动机为研究对象，对其运行特性和控制策略进行研究，是有较重要的理论和实际意义的。
• 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
  搭建了一个基于dsp的usm整体驱动控制系统,对系统进行测试实验,实验结果表明:本系统运行稳定、响应速度较快,能够较好的实现usm的驱动及调速控制。
• 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 )
  本文针对行波型超声波电机的特点，以及行波型超声波电机驱动的特点和要求，在对行波型超声波电机的驱动控制系统进行了深入研究的基础上，设计了一套基于dsp的简单可行的驱动控制系统。
• 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
  摘要本文对一类直线型驻波超声电机振子的振动模态进行了系统的分析，讨论了定子齿的位置、几何尺寸对直线型超声电机的固有频率、振型的影响，为该类驻波型直线超声电机的设计提供了理论依据。
• 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中的神经网络工具箱进行结构设计和离线训练,通过仿真实验最终确定了2 - 8 - 1的三层网络结构,将训练后得到的权值、阈值结果写到dsp中,进行控制过程中给定速度的在线训练,从而达到控制电机转速的目的。
• 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
  超声波电机( ultrasonicmotor )是近二十年来发展起来的一种新原理电机，其原理不同于传统的电磁型电机，它是利用压电陶瓷的逆压电效应使定子的表面质点产生椭圆运动，通过定子和转子之间的摩擦力驱动转子运动。这种新型的电机与传统电磁电机相比，具有响应快、不受电磁干扰、结构紧凑、低速、大扭矩、断电自锁等优点，因而在微型机械、机器人、精密仪器、家用电器、航天器、汽车等方面显示出广泛的应用前景。
• 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
  文中根据usm的特点,设计了一种新型的驱动电路用来实现电机的频率自动跟踪及驱动电机的运转,并采用了智能控制理论中的bp神经网络算法,利用数字信号处理器( dsp )的运算能力强、精度高、速度快等特点,实现了一个超声波电机的驱动控制系统。
• 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
  根据usm的特点,选取一款专用于电机控制的dsp芯片tms320lf2407a ,设计了硬件接口电路、各功能部分的流程图及控制算法程序,以ccs为编译环境,进行电机整个控制系统的软件编写与调试。