油井电火花解堵机器人控制系统设计研究

本文对电火花解堵机器人进行控制系统的设计研究.控制系统采用Motomla单片机作为控制芯片,具体介绍了硬件电路以及软件程序的设计过程.通过地面试验,该控制系统可正常工作,拥有较高的应用价值.     

水下滑翔机器人嵌入式控制系统

本文对水下滑翔机器人的特点进行了详尽的分析.针对水下滑翔机器人控制系统的软、硬件组成特点和水下滑翔机器人工作原理,详细介绍了水下滑翔机器人嵌入式控制系统的软、硬件系统的组织机构.细致地阐述了软、硬件系统的设计理念与实现方法.     

基于PLC的简易车辆清洗机控制

本文利用CPlH可编程控制器,设计了一款简易车辆清洗机控制系统,文中详细说明了控制系统的工作过程,并进行了硬件设计和软件设计,本系统编程、设计简单,可靠性高.     

数控弹簧机控制系统的设计

介绍了用触摸屏、PLC、变频器设计数控弹簧机控制系统,详细地介绍了该机控制系统的工作原理,硬件的选型,软件的实现.该控制系统具有性价比高,参数修改容易等特点.     

燃料电池车电机闭环DSP控制系统设计

燃料电池车作为新型能源汽车,已成为电动汽车发展的新潮流.通过研究设计和实验将现有燃料电池车电机开环控制系统改进为双闭环控制系统,并以DSP为核心完成了控制系统的软件设计和硬件设计,实验结果表明设计正确,满足燃料电池车性能要求.     

三轴飞行仿真转台控制系统设计

为实现转台的高精度控制,设计了转台数字控制系统.该控制系统以MSP430单片机为控制核心,采用模块化的设计理念和开放式的结构形式,设计了转台控制系统的硬件电路,并对其功能和原理进行了论述.以VC+ +6.0为开发环境,设计了控制系统的上位机软件结构;以IAR EW 5.0为开发环境设计了控制系统的下位机软件结构.为验证控制系统的性能,进行了控制实验,结果表明:系统控制效果良好,达到了预期效果.     

一种基于ARM9的CPT控制系统

介绍了非接触能量传输(Contactless Power Transfer)系统的嵌入式控制系统硬件设计及其软件编制.利用ARM9芯片和Linux操作系统以及MiniGUI图形库技术,设计出CPT系统的嵌入式控制系统.     

食品加工试验机的微机控制系统

基于食品加工试验机控制系统的性能指标,本文介绍了控制系统的设计和实现.控制系统的硬件由工控机和远程测控模块组成,采用了RS485总线.系统基于组态王组态软件的开发设计,对现场进行监控和调试.目前,系统运行良好,可靠性高,符合设计要求.     

基于单片机的氧化锌电炉控制系统设计

设计了一种以89C51单片杌为核心的氧化锌电炉控制系统,给出了控制系统的硬件及软件设计方案,该设计能够准确地控制氧化锌电炉的生产过程.实践结果表明,该控制系统设计方案合理可行,具有成本低廉,操作灵活,可靠性高等优点.     

FDM工艺中送丝电机可调速控制系统的设计与实现

介绍了送丝电机可调速控制系统的设计,包括硬件电路的设计和控制算法及软件的实现.验证表明,采用本文提出的控制系统,电机在稳定工作阶段,运行速度平稳,满足送丝电机可调速控制系统的要求.     

基于LVM 的系统扩容技术研究

近年来,随着大数据业务的使用,系统在运行时会产生大量的数据信息与日志文件并保存在磁盘中。由于在系统规划初期,对系统分区大小规划预期不足,很难合理规划磁盘空间,造成后期系统运行中经常出现系统分区磁盘不足的问题。当发生此类告警时,通常的分区很难动态调整大小,通常采用暂停业务,更换磁盘,数据备份与恢复的方式,该方式操作困难,程序复杂,有数据丢失的风险。在Linux系统里使用LVM(逻辑卷)技术,支持在线空间扩容,可以在用户无感知的情况下扩展系统分区容量,达到合理利用磁盘空间的目的。本文介绍了LVM技术,并在Linux系统里将分区做成逻辑卷,达到合理利用磁盘空间的目的。     

APSK调制在基于OFDM可见光通信系统中的性能分析

在基于正交频分复用(Orthogonal frequency division multiplexing,OFDM)的可见光通信(Visible light communication, VLC)系统中,发光二极管(Light emitting diode,LED)的非线性特性是影响系统性能的一个重要因素。为了减小LED非线性的影响,将幅度-相移联合键控(Amplitude-phase shift keying, APSK)调制与OFDM技术相结合的传输方式引入可见光通信系统中。本文介绍了APSK调制的原理及其在基于OFDM调制的可见光通信系统中的应用,建立了基于APSK-OFDM调制的可见光通信系统模型,并与常用的基于正交幅度调制（Quadrature amplitude modulation, QAM）的OFDM系统性能进行了对比。仿真结果表明,在OFDM系统中,如果信道是理想的,QAM调制的性能要比APSK调制的性能好;但当考虑到LED的非线性特性时,后者的性能要明显优于前者。     

一种属性权威系统的设计与实现

设计并实现了一个属性权威（AA）系统，该系统由农业银行属性权威服务器系统（AB AA）、农业银行属性注册权威服务器系统（AB ARA）和农业银行目录服务器系统构成，用于提供属性证书的签名、发放及生命周期管理等。     

基于多智体多库协同的一种虚拟现实仿真界面构建技术

一、引言计算机仿真接口界面,随着计算机软硬件的不断提高也在快速地变化着。从其发展趋势中我们不难看出这一点:从早期的命令行提示编辑Command Line,到全屏幕菜单编辑(Menu based Editor),再到图形用户界面Graphic User In-terface(GUI),界面在不断追求如何更好地适应用户、与用户更直接地交互。其具体特点包括自然而又丰富的色彩、逼真而又完美的几何造型、柔和而又动听的环境声响、质感而又具有力反馈的实物等。这些人们所需要的真实感,一种技术是难以胜任的,它需要各种软、硬件技术的综合与集成。从目前的趋     

Real‐time thermal Management of Open‐Cathode PEMFC system based on maximum efficiency control strategy

Improving the efficiency of the proton exchange membrane fuel cell (PEMFC) system is the main problem should be solved for the commercialization of PEMFC. In this paper, the efficiency characteristic of PEMFC system under load and stack temperature variation is analyzed through theoretical modeling and experimental verification. For high efficiency operation of PEMFC system, the maximum efficiency control strategy (MECS) is proposed for thermal management of PEMFC system. According to the efficiency characteristics of PEMFC system, the optimal efficiency trajectory of system is obtained under maximum efficiency optimization (MEO). As PEMFC system is a nonlinear system with the characteristics of time‐variation, and uncertainty, a constrained generalized predictive control (CGPC) is proposed to realize real‐time optimal efficiency trajectory tracking. The MECS based on MEO and CGPC is implemented on‐line, experimentally validated on the established H‐300 open‐cathode PEMFC system. The experimental result shows better tracking ability compared with PID control and testifies the validity of MECS for increasing the system efficiency. Therefore, the proposed MECS can provide better system dynamic response and higher system efficiency.     

基于数据仓库的投资项目决策支持系统研究

以投资项目决策支持系统IPDSS为例,研究了数据仓库技术在决策支持系统中的应用。介绍了决策支持系统的概念和作用,以及建立投资项目决策支持系统的意义,并在数据仓库、联机分析处理和数据挖掘的理论基础上,提出了基于数据仓库的决策支持系统的体系结构。然后,在此基础上建立了IPDSS,并分析了IPDSS的主要模块和模型、C／S体系的三层结构以及数据仓库管理系统。IPDSS的实际应用效果表明,将数据仓库技术应用到决策支持系统中。能够提高系统的性能和决策支持效果,是DSS未来发展的新方向。     

Adaptive RTRL based neurocontroller for damping subsynchronous oscillations using TCSC

Modern interconnected electrical power systems are complex and require perfect planning, design and operation. Hence the recent trends towards restructuring and deregulation of electric power supply has put great emphasis on the system operation and control. Flexible AC transmission system (FACTS) devices such as thyristor controlled series capacitor (TCSC) are capable of controlling power flow, improving transient stability and mitigating subsynchronous resonance (SSR). In this paper an adaptive neurocontroller is designed for controlling the firing angle of TCSC to damp subsynchronous oscillations. This control scheme is suitable for non-linear system control, where the exact linearised mathematical model of the system is not required. The proposed controller design is based on real time recurrent learning (RTRL) algorithm in which the neural network (NN) is trained in real time. This control scheme requires two sets of neural networks. The first set is a recurrent neural network (RNN) which is a fully connected dynamic neural network with all the system outputs fed back to the input through a delay. This neural network acts as a neuroidentifier to provide a dynamic model of the system to evaluate and update the weights connected to the neurons. The second set of neural network is the neurocontroller which is used to generate the required control signals to the thyristors in TCSC. This is a single layer neural network. Performance of the system with proposed neurocontroller is compared with two linearised controllers, a conventional controller and with a discrete linear quadratic Gaussian (DLQG) compensator which is an optimal controller. The linear controllers are designed based on a linearised model of the IEEE first benchmark system for SSR studies in which a modular high bandwidth (six-samples per cycle) linear time-invariant discrete model of TCSC is interfaced with the rest of the system. In the proposed controller, since the response time is highly dependent on the number of states of the system, it is often desirable to approximate the system by its reduced model. By using standard Hankels norm approximation technique, the system order is reduced from 27 to 11th order by retaining the dominant dynamic characteristics of the system. To validate the proposed controller, computer simulation using MATLAB is performed and the simulation studies show that this controller can provide simultaneous damping of swing mode as well as torsional mode oscillations, which is difficult with a conventional controller. Moreover the fast response of the system can be used for real-time applications. The performance of the controller is tested for different operating conditions.     

A novel hybrid DEPS optimized fuzzy PI/PID controller for load frequency control of multi-area interconnected power systems

In this paper, a novel hybrid Differential Evolution (DE) and Pattern Search (PS) optimized fuzzy PI/PID controller is proposed for Load Frequency Control (LFC) of multi-area power system. Initially a two-area non-reheat thermal system is considered and the optimum gains of the fuzzy PI/PID controller are optimized employing a hybrid DE and PS (hDEPS) optimization technique. The superiority of the proposed controller is demonstrated by comparing the results with some recently published modern heuristic optimization techniques such as DE, Bacteria Foraging Optimization Algorithm (BFOA), Genetic Algorithm (GA) and conventional Ziegler Nichols (ZN) based PI controllers for the same interconnected power system. Furthermore, robustness analysis is performed by varying the system parameters and operating load conditions from their nominal values. It is observed that the optimum gains of the proposed controller need not be reset even if the system is subjected to wide variation in loading condition and system parameters. Additionally, the proposed approach is further extended to multi-area multi-source power system with/without HVDC link and the gains of fuzzy PID controllers are optimized using hDEPS algorithm. The superiority of the proposed approach is shown by comparing the results with recently published DE optimized PID controller and conventional optimal output feedback controller for the same power systems. Finally, Reheat turbine, Generation Rate Constraint (GRC) and time delay are included in the system model to demonstrate the ability of the proposed approach to handle nonlinearity and physical constraints in the system model.     

利用GPS对计算机实现精确授时

阐述了如何利用GPS对单个计算机进行精确授时。系统利用软件，从GPS接收器获取UTC时间码和秒定时信息，并对计算机时钟进行校准。该系统具有投资省、精度高、用途广等特点，取得了满意的效果。     

基于CORBA与DDS技术改进DRS系统通信

为了解决目前国内现有航管雷达模拟机系统(DRS系统)数据通信时存在数据丢失、数据延迟、系统不稳定方面的问题,提出了一种基于公共对象请求代理结构( CORBA)技术与数据分发服务(DDS)技术的新通信模式.研究了现有DRS系统的通信模式及存在的问题,探讨了CORBA技术和DDS技术在DRS系统中的应用,并对DRS系统在新通信模式下的通信质量进行了分析总结.实验结果表明,该方法能很好解决目前DRS系统在通信上存在的以上问题.