A Digital Computer Engineering Laboratory

The course and laboratory discussed in this paper offer students an opportunity to gain realistic experience in the engineering of digital computers. The laboratory provides a sufficient number of logic elements to allow students to construct general purpose digital computers of modest design; only a few assemblies of fixed design are provided. The course progresses from work with basic combinational and sequential circuits through the design and testing of digital subsystems, to a project in which groups of students are challenged to specify, design, test, program, and demonstrate their digital computer. Two years of experience indicate that students are willing to enthusiastically expend a great deal of effort to meet this challenge.     

A Digital Systems Project Laboratory

In the past two years a Digital Systems Project Laboratory has been developed within the Department of Electrical Engineering at Massachusetts Institute of Technology. The major objective is to allow the student to acquire a working knowledge of digital systems early in his undergraduate career. The emphasis is experimental, but about one-third of the semester is devoted to classroom activities. The classroom portion of the subject is used to present theoretical material normally unavailable to the student until the latter part of his junior year. However, the principal emphasis, even in the classroom, is on the design and implementation of moderately complex digital systems using integrated circuits at realistic speeds. A modular equipment system is described. An evaluation of the subject has been made by the students and most of them consider it to be as interesting and valuable as most classroom subjects.     

分级计算机控制系统在企业中的应用

分级控制系统具有可靠性高、速度快、系统具有模块化、价格低、设计开发维修简便等特点,非常适合常规的工作控制。     

A Digital Control Laboratory

A laboratory facility is described that provides for the experimental study of digital control systems. The activities of the laboratory are designed to permit experiments in data conversion, data acquisition, hybrid system simulation, computer control of typical physical processes, and binary and decimal data transfer between a digital computer and peripheral equipment. The main facility of the laboratory is a PDP-8 computer, a small general-purpose computer. The laboratory program is part of an educational program in the study of discrete systems and computer control system. This program is also briefly described.     

Computer Based Supervisory Control Systems

The paper presents a comprehensive review of computer based supervisory control systems for pipeline control. It is organized into two main sections dealing with the functional requirements and the equipment requirements for these applications. Each of these main sections deals with general considerations and then specifically with central station terminal facilities and remote station requirements. The equipment section is supplemented with a discussion of system assembly and test procedures.     

16位单片机在SRM中的应用研究

简述开关磁阻电动机优点之后,指出当前SRM应用受到限制的主要原因和研制全数字计算机控制系统的必要性和迫切性.论文给出硬件和软件的设计,特别是PID框图,提供了试验曲线和结果,可以预言其应用前景非常广阔.     

多重采样在APF数字控制中的应用研究

有源电力滤波器(APF)控制器的主要功能是跟踪谐波电流指令,对控制器的稳态误差在较大频率范围内都有很高的要求.通常在采用数字控制的系统中,提高采样频率有助于提高系统的性能,采样频率越高,离散控制器与模拟控制器的性能越接近.多重采样在提高采样频率的同时,并不要求提高载波频率和开关频率,可以应用在高带宽场合.实验结果表明,采用多重采样后,相比于传统采样方式,APF的补偿性能有了明显提高.     

基于DSP的全数字式变频调速系统

该系统实现了基于DSP的全数字控制变频调速系统,DSP作为控制与运算的核心,具有极高的透明度、灵活性和高性能。驱动电路采用EXB840专用芯片实现。     

Toward More Meaningful Laboratory Experiences in Digital Signal Processing and Digital Control

Digital signal processing and digital control are of utmost importance for electrical engineering students, for they are present in many aspects of today's technical world. Complex topics like these should not be introduced into a curriculum as a crash program, but taken as steps in an evolutionary process. A successful example of this evolutionary process is well underway at the University of Missouri-Rolla.     

Load Flow Analysis of Electrical Distribution Systems Using the Digital Computer

This presentation discusses the utilization of the digital computer for load flow analysis and optimization in customer-owned electrical distribution systems. Discussed are a) program utility, b) program construction, c) input format, d) output format, e) interpretation, and f) options.     

A Real-Time Computer Control Demonstrator for Use in a University Control Laboratory

An angular position servosystem made of a dc servomotor controlled by a TM990 microcomputer is described. The objective is to offer a control laboratory demonstrator for the study of a number of questions concerning computer control theory and practice. The control strategy uses state feedback and can be chosen to be either of the Kalman regulator type or of the bang-bang relay type; the parameters of these strategies such as gain, threshold, quantization levels, and sampling frequency can be selected via appropriate teletype commands. The evaluation of the state can be made in three different ways: a direct position and speed measurement, a direct measurement of the position followed by the computation of the derivative to obtain the speed, and the use of a Kalman-Bucy observer. The computer program is written in Basic.     

Using Digital Measurement in Raw Mill Control Systems

Digital measurement is described, and its importance to the raw mill operation is discussed. The systems that can make use of digital measurement are also considered.     

计算机控制的起重机系统设计

基于起重机升降控制系统的特点和设计要求,提出了利用PIC单片机进行设计的方案,给出了硬件电路和软件设计,对系统安全控制和快速启动作了讨论。最后,对实验结果进行了相应的分析。     

火电厂数字图像计算机监控系统的设计与应用

分析了国内电站锅炉炉膛火焰与汽包水位电视监视的现状和运行需求,介绍了基于计算机数字图像处理的全炉膛火焰与就地水位计监控系统的功能设计、系统实现和应用,为锅炉测控和安全、优化运行提供了新功能。     

数字正交检波技术在无线声表面波传感器系统中应用

文中提出数字式正交检波技术来测量相应的方法，通过对声表面波的回波窄带信号进行仿真计算和误差分析，表明采用的方法性能良好，与已有硬件实现的正交检波器相比，测量精度大大提高。并分析数字正交检波方法的实现中，ADC对结果的影响。     

计算机监测系统在米酒发酵中的应用

计算机监测系统能实时准确地将检测量送到相应的部门进行分析控制,使发酵在理想的温度下进行。     

Digital Computer Control and Testing of Compressor Stations

The benefits of digital computer control have been discussed in relation to chemical, petroleum, and many other industrial processes at great length on numerous occasions. When discussing the benefits and principles of computer control, the gas transmission pipeline reciprocating compressor station can also be considered a processing unit which, in a very complex manner using expensive machinery, converts raw feed (natural gas fuel) into product (energy in the natural gas in the form of increased pressure). This is particularly true since the introduction of the latest generation of reciprocating compressors with their new innovations.     

PLC在过程控制系统实验装置中的应用

本文介绍了西门子PLC混合网络在过程控制实验装置中的应用。控制系统在逻辑结构上分为两层：现场设备层和网络控制层，PROFIBUS用于现场设备层，网络控制层采用工业以太网。文章对控制系统的设计思想、系统结构、组态方法进行详细的分析和论述。     

数字电子式互感器在分布式电力系统的应用

针对分布式电力系统(PSDG)下的测量、保护与控制问题,提出以数字电子式互感器(DET)为核心,构建小型化、智能化和网络化的PSDG测控保护系统的技术方案,以适应PSDG发展的需要。重点探讨了数字电子式互感器应用于PSDG时传感器暂态特性、同步采样、分布式通信及就地测控保护单元等关键问题及解决思路,并简要分析了DET技术研究对相关领域的影响。该领域的研究对于提高PSDG的自动化水平和运行安全可靠性、加快其在我国的应用和推广具有重要的理论和现实意义。     

Design of Appliance Control Systems Using Computer Simulation

The availability of computers and the advancement of control techniques have provided the necessary prerequisites for efficient investigation of appliance control systems by computer simulation. This paper discusses the general approach to simulation of appliance control systems, including discussions of determination of performance specifications, mathematic modeling of the appliance, simulation of the various control strategies, computer implementation, and evaluation of the results. Advantages and limitations of computer simulation are discussed. A specific application of a range temperature control system is utilized throughout the paper to demonstrate the application of the techniques and to show the value of computer simulation.