数字运动控制芯片IRMCK201在交流调速系统中的应用

数字运动控制芯片IRMCK201是美国国际整流公司开发的数字运动控制芯片，是专门针对伺服驱动系统而设计的。该器件可实现完整的速度环和电流环控制，具有快速的高性能伺服驱动能力。文中详细介绍了IRMCK201的主要功能、特点和主要接口，并给出了一个应用于随动系统的交流伺服驱动的实例。     

基于IRMCK201和ZigBee的圆网印花同步控制系统

针对圆网印花系统中导带驱动辊与圆网驱动对速度同步的要求,提出了基于IRMCK201和ZigBee技术的圆网印花同步控制系统,给出了同步控制系统结构。选用IRMCK201专用电机伺服控制芯片作为各驱动电机的伺服控制器,选用基于ZigBee技术的无线芯片CC2430作为系统主控制器和数据通信网络。设计了伺服控制电路、主控制器和无线通信节点电路以及相应的程序流程,实现了圆网印花系统各单元的速度同步控制。运行结果表明,该系统稳定可靠、抗干扰、能耗低、体积小、成本低,为纺织生产中圆网印花各驱动单元的同步控制提供了一种新技术。     

IR革命性数字运动控制集成电路有助省去编程工作

国际整流器公司 (IR) 专攻运动控制的iMOTION集成设计平台再添两项新器件。传统的电机控制皆依靠复杂的数字信号处理器或微处理器控制单元,而全新IRMCK201及IRMCK203数字控制集成电路则有所不同,通过其配备独特的运动控制引擎,可省去软件编程。其中,IRMCK201具备以编码器反馈为基础的电流和速度闭环控制功能,专攻伺服应用。该器件能与包括IR2175线性电流传感IC、IR2136三相逆变驱动IC、以及IRAM 6A至20A集成功率模块,等iMOTION芯片组其余部分兼容。IR2175可提供电流反馈信息,具有支持高频宽和特快加速的快速频率输出 (Fo…     

单轴转台伺服控制系统电路设计

单轴转台作为一种运动控制装置,已经在许多领域得到广泛应用。为了缩短转台伺服控制系统的开发周期和提高系统的可靠性,提出了以永磁同步电机为执行机构、以IRMCK203为伺服控制器的设计方案,并以智能功率模块PS21867和IRMCK203为核心进行了控制电路软硬件设计。     

基于PMSM调速的高精度跟踪系统设计研究

从跟踪系统定位的精确性、跟踪的平稳性需求出发,结合交流伺服电机优良的控制性能,详述了通过采用合理的ARM FPGA芯片组控制策略以及完备的伺服控制芯片IRMCK201完成PMSM调速系统精确控制的方法。该控制策略的使用,提高了系统整体运动性能,实现了硬件资源的最大化利用。同时为交流伺服电机的容量选取方法提供了具有可操作性的参考资料。     

iMOTION使运动控制更简单

国际整流器公司近日推出两款针对运动控制的iMOTION集成设计平台新器件：IRMCK201和IRMCK203数字控制IC，可针对不同种类的永磁或交流感应电机及其位置传感器，革新运动控制算法的配置工作。     

高性能IRMCK201型可配置数字AC伺服控制IC

IRMCK201是IR公司推出的一款交流伺服电机控制集成电路。它包含正弦波电流用的闭环电流控制及基于编码器位置反馈接口的闭环速度控制接口。它除具有一个标准RS232C或RS422通信口外，还有一个快速SPI通讯接口。与传统的DSP或微控制器不同，IRMCK201不需要编程即可完成复杂的控制算法。针对特定应用，用户可专门配置算法。     

IR新推出两款数码运动控制IC

国际整流器公司(International Rectifier，简称IR)专攻运动控制的iMOTION集成设计平台再添两种新器件。全新IRMCK201及IRMCK203数码控制集成电路(IC)，可针对不同种类的永久磁体或交流电感马达及其定位反馈器件，革新运动控制算法的配置工作。     

基于Freescale MC9S08GB60单片机的运动控制方案

运动控制开发平台具有如下特点： Freescale MCU和IR专用电机控制IC IRMCK201协调配合，发挥各自优点，实现优良的速度、电流和位置控制。     

伺服控制系统中高精度电流采样的设计

本文探讨了在高精度伺服控制系统中基本控制方案以及电流环的控制策略。详细叙述了电流采样与处理,以及关键件的选型,并给出了实验结果。所设计的伺服驱动控制器在数控加工中心进行机械加工测试,得到了微米级加工精度的良好结果。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks