食堂售饭系统窗口机设计

叙述了传统食堂售饭系统的不足，介绍了CAN总线与非接触式IC卡技术的特点和优势，并对以这两种技术为基础的新型食堂售饭系统窗口机的软硬件设计原理进行了较详细的分析。窗口机硬件系统主要由CAN总线通信接口、IC卡读写器、键盘、显示和存储器等功能模块组成，软件系统主要由窗口机初始化模块、窗口机监控模块、窗口机按键处理模块等组成。论文在对窗口机原理进行分析的同时，也对设计中遇到的关键问题进行了讨论，对于今后食堂售饭系统的设计提供了一个新的思路。     

应用电视设备管理控制系统

系统介绍了广播电视设备控制系统硬件基本结构及基本控制原理和系统管理软件包功能,对系统控制的实用性作了比较详细的分析和说明。该系统在电视台设备管理应用中具有很强的实用性和通用性。     

Closed‐form solution for seismic response of adjacent buildings with linear quadratic Gaussian controllers

Closed‐form solution for seismic response of adjacent buildings connected by hydraulic actuators with linear quadratic Gaussian (LQG) controllers is presented in this paper. The equations of motion of actively controlled adjacent buildings against earthquake are first established. The complex modal superposition method is then used to determine dynamic characteristics, including modal damping ratio, of actively controlled adjacent buildings. The closed‐form solution for seismic response of the system is finally derived in terms of the complex dynamic characteristics, the pseudo‐excitation method and the residue theorem. By using the closed‐form solution, extensive parametric studies can be carried out for the system of many degrees of freedom. The beneficial parameters of LQG controllers for achieving the maximum response reduction of both buildings using reasonable control forces can be identified. The effectiveness of LQG controllers for this particular application is evaluated in this study. The results show that for the adjacent buildings of different dynamic properties, if the parameters of LQG controllers are selected appropriately, the modal damping ratios of the system can be significantly increased and the seismic responses of both buildings can be considerably reduced. Copyright © 2001 John Wiley & Sons, Ltd.     

Multiobjective optimal FLC driven hybrid mass damper system for torsionally coupled,seismically excited structures

In most of the research work on structural vibration control only two‐dimensional plane structural modelling has been considered, although only a few practical building structures can be modelled as planar structures. Therefore, these methods are not directly applicable to the majority of the practical building structures. This paper discusses the design of a multiobjective optimal fuzzy logic controller (FLC) driven hybrid mass damper (HMD) system for seismically excited torsionally coupled building structures. Floor acceleration and velocity information have been used as feedback to the fuzzy logic controller. A three branch tournament Genetic Algorithm has been used for the multiobjective optimal design of the FLC driven HMD system, where the minimization of the non‐dimensionalized peak displacement, acceleration and rotation of the structure about its vertical axis, have been as the three objective functions. The proposed multiobjective optimal fuzzy logic controller has been verified for an example problem reported in the literature. This HMD system consists of four HMDs arranged in such a way that the system can control the torsional mode of vibration effectively in addition to the flexure modes of vibration. Copyright © 2002 John Wiley & Sons, Ltd.     

基于TMS320LF2407的遥感稳定平台控制器设计

在遥感过程中,要用稳定平台补偿飞行载体的姿态变化,以达到使相机垂直对地的目的。本文简要介绍了稳定平台的组成;分析了模糊算法和PID算法的控制优势;详细叙述了以微机械陀螺为反馈传感器,以TI公司的电机控制DSP芯片TMS320LF2407为控制器核心的控制系统软硬件设计与实现。结果表明,系统具有较好的稳定性和较高的精度,满足遥感平台的基本要求。     

基于RFID的智能语音导游系统的设计与实现

提出一种基于射频识别和单片机技术的智能语音导游系统的设计和实现方案,阐述了系统的工作原理,详细介绍了系统各模块的硬件实现方法以及模块间的接口电路,并给出导游系统工作的软件流程图.通过测试表明,该导游系统可智能定位,具有支持长时间语音播放及易于语音信息更新等优点.     

Parameter-dependent vibration-attenuation controller design for electro-hydraulic actuated linear structural systems

The problem of robust active vibration control for a class of electro-hydraulic actuated structural systems with time-delay in the control input channel and parameter uncertainties appearing in all the mass,damping and stiffness matrices is investigated in this paper.First,by introducing a linear varying parameter,the nonlinear system is described as a linear parameter varying(LPV)model.Second,based on this LPV model,an LMI-based condition for the system to be asymptotically stabilized is deduced.By solving these LMIs,a parameter-dependent controller is established for the closedloop system to be stable with a prescribed level of disturbance attenuation.The condition is also extended to the uncertain case.Finally,some numerical simulations demonstrate the satisfying performance of the proposed controller.     

天气雷达数据处理系统的设计与实现

天气雷达数据处理系统是“全国天气雷达终端更新”项目的关键,其目的就是要实现雷达回波信号的高速采集与处理、天线控制、实时显示与存储、回波强度定标等功能。设计中,利用复杂可编程逻辑器件（CPLD）和QuarmsII设计软件,产生各种复杂的时序逻辑控制时钟,协调信号处理器、天线控制器中各功能电路的工作。实现的数据处理系统达到了系统的技术指标,通过实际使用证明,系统性能稳定可靠、结构简单、界面友好、操作方便、便于升级,完全能够实时、高效地处理常规天气雷达信号。     

天气雷达数据处理系统的设计与实现

天气雷达数据处理系统是“全国天气雷达终端更新”项目的关键,其目的就是要实现雷达回波信号的高速采集与处理、天线控制、实时显示与存储、回波强度定标等功能。设计中,利用复杂可编程逻辑器件（CPLD）和quartusⅡ设计软件,产生各种复杂的时序逻辑控制时钟,协调信号处理器、天线控制器中各功能电路的工作。实现的数据处理系统达到了系统的技术指标,通过实际使用证明,系统性能稳定可靠、结构简单、界面友好、操作方便、便于升级,完全能够实时、高效地处理常规天气雷达信号。     

可编程时控器及其在地震台的应用

可编程时控器的原理是用电子数字钟的时间显示,经过适当组合、逻辑变换作为地址代码,直接在静态随机存贮器中写入或读出有关的操作指令,由此构成了一个新颖的时序控制器。这种时序控制器在武汉地震台的技术管理应用中,获得了良好的效果。