基于F2407aDSP的全数字混合动力电动汽车驱动系统的设计

在50kW混合动力电动汽车驱动系统中，本文采用了Buck＋Full_bridge的电路结构。同时，由F2407aDSP构成的全数字控制系统，实现了电动、发电等工作模式。实验结果表明，该系统性能可靠，满足混合动力电动汽车的驱动要求。     

新型混合动力汽车检测技术的研究及应用

对混合动力汽车的"动力控制策略"和"运行状况的监控系统"进行了研究,重点分析了实现混合动力驱动车辆的关键技术,并给出一种新型混合动力汽车控制系统的设计方法.该系统汇集了先进的电子技术于汽车领域中,因此具备精确的检测功能,满足了混合动力车高效节能的油电混合驱动控制系统的要求,同时增强了控制系统的稳定性和可靠性.     

串联式混合动力多轴独立驱动车辆的电机驱动系统设计

混合动力汽车具有低排放、省油等特点,引起汽车界极大关注并成为汽车开发的一个热点。本文介绍了串联式混合动力三轴独立驱动车辆的电机驱动系统设计,包括了基于CAN总线的多轮驱动系统基本结构、多轴电机驱动力分配策略、单电机驱动系统的硬件电路设计和基于转子磁场定向的矢量控制。最后给出三轴六轮车辆在加速、制动等不同工况下的三电机运行特性结果,实验结果表明该多电机驱动控制系统基本满足车辆运行的基本需求。     

高性能变频器和PLC在包装印刷自动套色位置系统的应用

以快速、高精度跟踪为主要目标的位置伺服系统是广泛应用于高精度位置控制的主要控制方式之一，其驱动信号为代表位置命令的脉冲信号，本文提出以全数字高性能变频器MSD0421A系列作执行机构，以PLC作驱动控制装置，利用PLC的高速计数器和脉冲集成输出功能与MSD0421A的脉冲位置控制方式构成包装印刷传动的位置控制系统，并实现了该系统的硬件与软件的开发。     

压电式微定位工作台及其控制系统

为了提高机床的定位精度，研究、设计了一种以柔性铰链为导向元件、压电陶瓷为驱动器的微定位工作台。微定位工作台在滚珠丝杠副驱动的基础上，对工作台进行了二次精定位。给出了工作台的设计简图，并对其动力学模型进行了分析，结合检测装置和微机控制系统，设计了基于前馈控制同数字PID反馈控制相结合的复合控制的微定位控制系统。实测表明，微定位工作台定位分辨率可达到0．01μm，可满足精密、超精密加工的需要。     

基于MC9S12DG128单片机的快速位置伺服系统的设计

本系统由单片机最小系统、键盘／显示控制、系统输入模块、直流伺服电机驱动电路等组成混合闭环控制系统。系统利用Freescale公司的MC9S12DG128 CPU作为主控芯片,基于快速PID算法,使某火炮的旋转角度控制达到快速位置伺服系统的要求。文章还论述了控制系统各器件的选择和单片机控制系统的软硬件设计,以及最后的调试和结果。     

软起动器在斗轮堆取料机控制系统中的应用

采用SIEMENS-3RW22系列电子式软起动器，对斗轮、悬臂皮带驱动机构电动机进行软起动控制，起动平稳、对供电系统无冲击。控制系统工作稳定。     

DSP在平行双轮电动车控制系统中的应用

通过对平行双轮电动车结构的阐述,介绍了控制系统的构成和工作原理,以及对无刷电动机的控制,并对系统的软件设计做了介绍.在平行双轮电动车控制系统中采用DSP芯片进行开发设计,不仅可以完成电动机驱动及保护的功能,而且大大提高了处理数据的效率,使驱动性能更加稳定.     

基于灰色模型的网络控制系统预测函数算法研究

网络控制系统存在不确定性的时间迟延和数据丢包,可视作具有随机干扰和参数时变的灰色系统.将广义被控对象建模为灰色系统模型,在此模型基础上设计了预测函数控制算法,推导出模型预测输出和控制量计算方程的求解;设计了控制器采用事件-时间混合驱动方式,传感器和执行器采用时间驱动方式的网络控制系统仿真平台.仿真结果表明该算法在线计算量小、抗干扰能力强,跟踪速度快、控制效果良好.     

一种便携式半导体激光PDT控制系统

设计研制了与第2代光敏剂相配用的半导体激光光动力治疗（PDT）控制系统，该系统采用掌上电脑（PDA），用VC6.0编程，通过PDA并口控制恒流源及制冷电路来驱动半导体激光器。结果表明，系统接入半导体激光器，控制系统工作正常；系统受干扰影响较小，工作稳定，具有便携、经济、精度高和效率高等特点。     

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.     

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.     

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.     

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