基于LPC2478的以太网试验系统设计

设计了一种用于演示以太网通信关键技术的以太网试验系统,给出了系统结构和试验项目.设计了以ARM7微处理器LPC2478为核心试验节点的硬件.在软件设计中移植了嵌入式操作系统内核和TCP/IP协议栈,提高了软件可靠性和可扩展性.利用IP协议,以数据发送和接收为实例,介绍了试验系统对于以太网关键技术进行演示的方法.     

A Laboratory Setup and Teaching Methodology for Wireless and Mobile Embedded Systems

Increasingly, electrical and computer engineers are making their careers in designing wireless embedded systems. This paper presents a teaching methodology and the associated laboratory setup designed to meet the needs in teaching wireless embedded systems. The courses allow the students not only to apply their previous knowledge of digital system design, computer architecture, electronic circuits, wireless networking, and software engineering, but experience actual systems engineering by designing and implementing a large-scale team project within a semester. A flexible hardware platform was developed and was accompanied by teaching methodologies that allow quick completion of ambitious course projects in this area.      

Design exploration of efficient implementation on SoC heterogeneous platform: HEVC intra prediction application

The relationship between CPU and hardware accelerator is critical especially in some systems that require intensive tasks and large amount of data to deal with such as video coding systems. This cooperation provides significant improvements in run‐time speed and power consumption. As software (SW) and hardware (HW) solutions provide better flexibility and performance, HW/SW implementation has emerged as a more efficient and desirable methodology for real‐time implementation. In order to evaluate different implementation methods (SW) and (HW/SW) in terms of power consumption, run‐time and area cost, we choose the Xilinx Zynq‐based FPGA as a target to perform some hardware acceleration tasks. In this case, we choose to accelerate the intra prediction block because it is one of the most complex modules defined in the high efficiency video coding decoder chain. Experimental results show that HW/SW accelerations are more than 50% improved in term of run‐time speed relative to SW modules. Moreover, the power consumption of HW/SW designs is saved by nearly 80% compared with SW cases. Copyright © 2016 John Wiley & Sons, Ltd.     

基于工业以太网和实时操作系统的多CPU嵌入式变电站通信处理平台

介绍了一种嵌入式变电站通信处理软硬件平台.该平台硬件包括主CPU插件和各种功能插件,并由工业以太网、CAN现场总线组成内部通信网络,具有网络化、分布式、模块化、可扩展性和开放性等特点;软件基于嵌入式实时操作系统,采用模块化分层设计思想,设计了通信处理软件平台,实现了数据库管理层、硬件抽象层、通信协议层,层与层之间通过API函数实现松散耦合.在该平台上通过软硬件不同的配置实现了变电站内的远动工作站、保护管理机、嵌入式故障信息子站等通信处理装置,并在各种电压等级的变电站中广泛使用.     

双CPU电力直流电源系统控制器

介绍了一种新型结构的电力直流电源控制器,在该控制器中采用了双CPU并行处理工作结构,两CPU间采用共享I^C总线方式交换数据。还介绍了利用硬件电路结合软件实现共享I^2C总线的方法,该方法解决了内部不含有I^2C决线专用寄存器的CPU系列,如ATMEL89C5X系列、INTEL8031等无法直接实现总线竞争从而共享I^2C总线的问题。在实际电路中证实这种共享总线的方法简化了CPU的外围电路,提高了控制器的工作效率,增强了电路的可靠性。     

分期建设的发电厂监控系统开发与实现

对于分期建设的发电厂监控系统应该采用开放式系统结构,标准的通信接口,人机界面开发平台应该选用面向对象的组态软件.这样的设计可以节约工程投资,降低后期工程施工的难度和风险.从发电厂监控系统功能设计与工程施工2个方面,提出了系统开发与实现的总体思路.从监控系统结构选择、人机界面开发技术、通信协议转换等方面作了详细介绍,对同期并网、备用电源自动投入等发电厂特殊监控功能的实现方式给出了具体方案.为了提高发电厂监控系统的可靠性,所有智能单元与后台监控系统配备了双通信通道,并通过脚本语言程序实现了后台监控系统的在线故障诊断和自动切换.从而在软硬件2个方面保证了整个监控系统的可靠性.     

基于组态软件的当地监控实现方案

工控组态软件用于对工业控制中的数据采集与过程控制功能进行组态，是自动控制系统监控层一级的软件开发环境。灵活多样的组态方式提供了良好的用户开发界面和简捷的使用方法，其预设置的各种功能软件模块可以非常容易地被组态从而实现和完成监控层的各项功能。采用先进的工控组软件实现监控功能，可缩短系统开发周期。介绍了采用该技术的内昆线当地监控系统设计方案、软硬件结构及系统功能。     

Software Engineering Education

Recent trends have led to the expanded use of digital computers in large complex system applications. The major burden of meeting the requirements for these systems has fallen on the flexibility of software. This has placed many demands on all areas associated with digital systems development. A significant impact has been on the development of software personnel required to develop and manage these complex systems. The purpose of this paper is to present a three level program for software education of executives, managers, and engineers which is being offered at the Air Force Institute of Technology (AFIT). The needs and approaches in satisfying software engineering education requirements are presented. Educational objectives for executives, managers, and engineers serve as the foundation of the curricula, courses, and topics presented.     

智能型断路器测控单元的软硬件设计

介绍一种以80C196KC单片机的核心的智能型断路器测控单元及其软硬件设计。该测控单元实时监控电流电压信号，具有三段电流保护和接地漏电保护等动作特性，硬件和软件均采用模块化设计，硬件总体结构由开关电源，信号检测单元，微处理器系统以及执行元件四部分组成，软件设计采用主程序循环查询中断标志位的设计思思，将程序分为主程序和中断子程序两部分，并给出主程序和部门分中断子程序流程图，目前，该测控单元样机已投入运行，运动结果达到预期设计要求。     

嵌入系统在变电站经济运行控制系统中的应用

针对变压器经济运行控制及备自投实现中存在的系统成本高和可靠性低的问题，设计了一种基于嵌入式的软、硬件系统平台。该平台通过硬件的模块化设计可降低系统开发成本和缩短开发周期。文中讨论了嵌入式硬件平台构架，基于MCF5282的主模块硬件设计，变压器经济运行原理及备自投的实现等问题。初步试验效果令人满意，表明该设计是成功的。     

Patterns of engineering

Both individuals and disciplines, as a whole, learn from experience. Patterns are a way to capture that experience which is often lost in traditional design literature. Patterns work with other patterns under human guidance to support a process for building systems that employ local adaptation and piecemeal growth. The pattern language design technique has roots in architecture and has close ties to broad engineering practices; many engineering artifacts (such as the article's suspension bridge and the push-pull amplifier examples) are typical patterns. Patterns are being widely used in object-oriented software development and have pushed into other areas of software engineering. However, they are a natural fit for a broad spectrum of current engineering design practices. Design can be defined as the process that takes one from a problem to a workable solution. Whether your design techniques help you create the reinforcements in a large dam, improve the speed or density of a VLSI circuit, or create the layout of a new neighborhood, they all have to do with creating structures that solve problems. Many of the solutions to the design problems set to students can be taught as engineering rules. Such rules are often the foundation for teaching an engineering discipline.     

基于RTDS的风光发电系统数字物理混合仿真分析

风光发电系统的仿真分析研究是发展可再生能源发电技术的重要环节,本文针对风光发电系统数字物理混合实时数字仿真的关键技术展开研究,构建风光发电系统电气架构和通信架构,采用实时数字仿真器作为研究工具,建立基于RTDS纯软件的各微电源单体控制系统模型和基于RTDS的数字物理混合仿真单体微电源模型,并分别在稳态和动态两种情况下对其进行仿真分析,研究两者间特性的差异,证明所建模型的有效性,为两类模型的选择使用提供指导。数字物理混和仿真分析条件更接近于实际情况,既可在物理平台上对控制策略的性能进行检验和调试,又可实时修正控制参数、控制策略,为实际工程设计提供重要实践依据。     

A laboratory testbed for embedded computer control

There has been a tremendous growth in the use of modern embedded computers in control and other applications in the past few years. While courses offered in the electrical and computer engineering disciplines cover such topics as microprocessors, digital and analog hardware, control theory, and programming languages, there exist few courses that focus on integrating these subjects for designing embedded systems. On the other hand, there is a growing need in industry for engineers who can perform software design and system integration for various applications in embedded control. Toward filling this gap, this paper describes a laboratory testbed developed for a new course on Embedded Computer Control offered at the University of Western Ontario, London, ON, Canada. An outline of the course structure, laboratory setup, and the design aspects for implementing a modern embedded control application are presented. The embedded controller performs command, control, and user interface tasks required to operate a low-cost prototype of a thermal system. Furthermore, its network connectivity allows users to tune system parameters, start and stop running the system, and observe the status of the plant via the Internet.     

一类基于面向对象的监控系统设计新技术

基于对面向对象技术在软件开发领域的优势分析，结合Wonderware IAS平台软件和工程经验，提出了在工业自动化领域采用面向对象技术进行系统没计的基本方法，并对实现的关键技术作了深入论述，工程应用效果表明，该系统设计技术是可行和有效的，有工程推广价值。     

铁路牵引供电远动系统的工程设计

简要分析电气化铁道牵引供电远动系统的工程设计。根据系统的监控范围要求对系统的主要功能进行配置，根据系统总体设计原则提出3种网络构成方案以及2种工作模式。然后进行择优，进而确定通道及调度设备的构成模式。介绍了系统最终设计的硬软件配置。该设计方案已在武广线实施。     

电力系统硬件在环仿真应用的现状及展望

硬件在环仿真(HILS)是提升现代大电网系统仿真准确性、支撑开展高压直流/新能源等装置可靠性验证的有效手段。首先,在介绍HILS基本架构和优势的基础上阐述了HILS在提升电网一次系统仿真准确性、支撑电网二次控制系统测试验证方面的技术及应用现状;然后分析了电力系统HILS平台构建面临的挑战,提出可接入多异构数据模型的灵活架构技术、有限仿真资源下新能源场站等值和大型二次系统等效技术、控制对象接入的通用接口技术等技术方向;最后,从传统技术深化和与新技术融合发展2个角度探讨了电力系统HILS的未来发展趋势,以期对相关平台研发和仿真实验工作提供一定参考。     

Reconfigurable architecture of VDF filter for multidimensional data

In this paper, we present a hardware reconfigurable architecture of vector directional filter (VDF) and an experimental validation based on HW/SW implementation context. An FPGA with a Nios II processor combines the benefits of a programmable logic component as well as a microprocessor. VDF is very useful in multidimensional data (such as color images) for noise removal and details preservation. Comparative results between simulations of ANSI‐C and hardware implementation are given. An estimate method of nonlinear function is presented and serves as an approximation for the appropriate hardware implementation on FPGA. Finally, to verify the functionality of the implementation, a validation state using FPGA platform has been performed. This validation demonstrated that our implementation hardware system speeds up the filtering process as well as preserving a high data quality (image quality). Copyright © 2012 John Wiley & Sons, Ltd.     

嵌入式雷达综合诊断系统的设计与实现

为了满足雷达日益增长的对故障检测、诊断和维护的迫切需求,同时以提升雷达综合竞争力为研究目的,设计研制了一套针对雷达综合故障诊断的嵌入式系统。本文分别从系统框架和软件架构方面详细介绍了系统的设计原理、诊断策略和实现方法。该系统采用嵌入式的测试系统体系结构,结合基于构件技术的软件设计思想和开发方式,完成雷达BIT状态监测和性能自动化测试两大功能,实现对雷达故障的综合诊断能力,使得该诊断系统具有良好的通用性、可移植性和扩展性。实际应用证明该系统性能稳定,操作简单,使用维护方便,具有较高的实际应用价值。     

电力企业VPN管控系统体系结构设计

虚拟专用网络不仅具备低成本、良好的网络支持等特点,还具备租用专线的安全性优势,已广泛应用于拥有分支机构的大型企业.虚拟专用网络的管理已成为企业IT管理人员不得不认真面对的问题.文章在基于策略的网络管理、移动Agent等网络管理技术的基础上,提出了VPN管控系统架构.该架构能统一地管理包括VPN设备在内的网络设备,结合设备状态信息和预定义的管理策略,动态地实现全网管控,有效地帮助企业IT管理人员监控和管理企业VPN网络,优化网络资源的使用,减少维护工作的时间.     

用于电力系统控制的计算机辅助工程(CAE)平台的设计

介绍了用于电力系统仿真及控制器设计的计算机辅助工程平台的开发。给出了该平台的软、硬件设计方法,描述了该平台的功能和应用。利用该系统,可以使控制算法设计人员方便地将在平台上仿真后认为满意的算法直接提取出来,经平台提供的编译连接程序处理后直接下载到ＤＳＰ硬件中,从而显著提高了控制器设计的效率。文中还介绍了该平台在ＳＴＡＴＣＯＭ 控制方面的动模实验结果