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Proceedings of the IEEE

Issue 1 • Jan. 1970

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Displaying Results 1 - 25 of 57
  • [Front cover and table of contents]

    Publication Year: 1970, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1970, Page(s):1 - 3
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    Freely Available from IEEE
  • Status of process control computers in the chemical industry

    Publication Year: 1970, Page(s):4 - 10
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (770 KB)

    This article discusses the status of process control digital computers in the chemical industry and traces the growth of their usage during the past eight years. Analog computers for individual loop control are not included. Progress in the use of process control computers in the petroleum industry closely parallels that in the chemical industry. One of the most challenging phases of control syste... View full abstract»

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  • Remote computer control of an industrial process

    Publication Year: 1970, Page(s):10 - 16
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (774 KB)

    The development of a nonlinear dynamic model of an industrial process is summarized. The model includes additive stochastic terms and not all the state variables were accessible. Nonlinear state estimation was approximated by a linearized Kalman filter and the control algorithm was from dynamic programming. The development of software and hardware for a remote on-line computer control experiment i... View full abstract»

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  • Application of combined optimum control and estimation theory to direct digital control

    Publication Year: 1970, Page(s):16 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    This paper demonstrates methods for applying combined optimum control and estimation theory to serial systems with time delay. The case of serial linear systems with time delay is considered in detail; a result analogous to the separation theorem of linear systems is presented. Illustrative examples of serial chemical reactors, rolling mills, and second-order plus dead-time approximations of highe... View full abstract»

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  • An approach to minimum cost steel rolling

    Publication Year: 1970, Page(s):23 - 30
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (722 KB)

    A metal rolling process is examined, and shown to be an implicit, discrete, multistage, control process with admissible control set dependent only upon the system state. By means of numerical techniques, dynamic programming is applied to this process to generate a closed-loop roll setting policy which is optimal in the sense that it achieves a specified final state at minimum dollar cost. Digital ... View full abstract»

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  • Experience in installing a computer control system in a hot strip mill

    Publication Year: 1970, Page(s):30 - 37
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (846 KB)

    It is highly desirable to reduce the application period of a computer control system to a hot strip mill. Completion of a hot strip mill computer control system chiefly depends upon the time when slab tracking is operative, and on the setup calculation method and its checking method. For slab tracking, many support programs were devised such as dump, on-line monitor, process input-output simulator... View full abstract»

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  • Design of a real-time central data acquisition and analysis system

    Publication Year: 1970, Page(s):38 - 48
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    A computer system is described for real-time data acquisition and servicing of 40 asynchronous inertial guidance system test stations. Some data are received automatically from the small guidance system computers at a maximum rate of eight words per second. Other data are input manually at each station via a mode selector and several 16-position thumbwheel switches. The data are received, partiall... View full abstract»

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  • Computer control in pulp and paper 1961-1969

    Publication Year: 1970, Page(s):49 - 69
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2368 KB)

    The pulp and paper industry is a major one in the United States and utilizes many complex processes. The first control computer was installed in 1961, and the number of installations has increased steadily to about 47 in March, 1969. The applications at many of these installations have been published in some technical detail. This paper briefly describes the processes, many of the control problems... View full abstract»

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  • Computer control in the cement industry

    Publication Year: 1970, Page(s):70 - 77
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (895 KB)

    The cement manufacturing industry in the United States is described, as are the processing problems which make the utilization of computer control attractive. Computers are being used to assist in the proportioning of raw materials, the operation of the rotary kiln, and in the raw material and product grinding operations. Process measurement and identification problems currently preclude complete ... View full abstract»

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  • On-line computer applications in the electric power industry

    Publication Year: 1970, Page(s):78 - 87
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1753 KB)

    In two areas of major importance to the electric power industry-interconnected system operation and steam-electric energy conversion--on-line computer use has expanded during the past five years to applications of increasing complexity and importance. In systems operation, direct digital control is now in successful operation, and many aspects of system security are now monitored by centralized co... View full abstract»

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  • Process control software

    Publication Year: 1970, Page(s):87 - 97
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1077 KB)

    This paper examines the nature of the software which is necessary so that a real-time computer may be used to control industrial processes. The general nature of a process control software system is discussed, and several methods for implementing such a system are examined. This paper is divided into several sections. First, the general structure of process control software systems is examined, an... View full abstract»

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  • A real-time language for industrial process control

    Publication Year: 1970, Page(s):98 - 111
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1460 KB)

    Industrial computer control systems require the economical production of efficient software including executive systems, maintenance programs, and both special and general purpose application programs for direct digital control. Moreover, the hardware configuration varies considerably from the single dedicated control computer to a general purpose multicomputer system. RTL, a real-time language de... View full abstract»

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  • Multilevel systems and concepts in process control

    Publication Year: 1970, Page(s):111 - 125
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1579 KB)

    The overall objective of the paper is to point out how multilevel concepts and techniques can be applied in the process control field. The approach provides a framework for the structuring and design of a control and management information system for achieving a totally integrated plant automation. The multilevel concepts are classified in terms of strata, layers, and echelons and the use of these... View full abstract»

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  • An approach to computer control research in a university environment

    Publication Year: 1970, Page(s):125 - 132
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    The general problem of research in the university environment is outlined with specific reference to research in the area of computer control of systems. An approach is presented based on experience with the industrially supported research program at Case Western Reserve University in the control of complex systems. The paper is organized around five aspects of the Case program as follows: 1) defi... View full abstract»

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  • Correction to "Encapsulation of integrated circuits"

    Publication Year: 1970, Page(s): 132
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  • Computational approach to screen design in color picture tubes by use of an electrical circuit analog

    Publication Year: 1970, Page(s):137 - 138
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (218 KB)

    The white brightness of a color TV tube can be calculated by use of an electrical circuit analog in which the role of the three individual cathodoluminescent phosphors may be thought of as three resistors in a parallel circuit. View full abstract»

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  • Comments on "Injection phase-locking characteristics of LSA-mode transferred-electron oscillators"

    Publication Year: 1970, Page(s):138 - 139
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  • An acoustic technique for studying thyristor turn-on action and di/dt capability

    Publication Year: 1970, Page(s):139 - 140
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    Mechanical shock waves have been detected emanating from the initial turn-on region in thyristors. This phenomenon has enabled the position of the ignition point to be determined and has allowed nondestructive examination of the effect of some parameters on di/dt capability. View full abstract»

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  • A comparison of the born and rytov methods

    Publication Year: 1970, Page(s):140 - 141
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB)

    A simple relationship between the terms of the Born and Rytov series is derived based on elementary considerations. Two examples are presented which show that the Born and Rytov methods can have a considerably different domain of validity. View full abstract»

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  • Instantaneous spectra and instantaneous frequency

    Publication Year: 1970, Page(s): 141
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    A simple relation exists between the instantaneous frequency and the instantaneous spectrum of an analytic signal which does not depend on an assumption that the instantaneous frequency varies slowly. View full abstract»

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  • Attenuation characteristics of coplanar waveguides

    Publication Year: 1970, Page(s):141 - 142
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    Some preliminary Q measurement results obtained on coplanar waveguides are reported. The novel surface strip transmission lines have loss characteristics similar to those of microstrip lines of the same width and characteristic impedance. View full abstract»

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  • Frequency comparison of five commercial cesium standards with a NASA experimental hydrogen maser

    Publication Year: 1970, Page(s):142 - 143
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    Recent long-term phase comparisons between five commercial cesium beam frequency standards and a NASA experimental hydrogen maser, NX-1, have yielded a value for the frequency of the hydrogen maser of 1 420 405 751.7767±0.0024 hertz which is 6.77×10-12±1.66 lower than that given by Vessot et al. in 1966. View full abstract»

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  • High-frequency MOST structures

    Publication Year: 1970, Page(s):143 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    By doping the substrate of a MOST more heavily near the Si-SiO2interface than in the bulk of the semiconductor, an improvement in the transconductance can be achieved. Since the gate capacitance after the turn-on remains unchanged, an improvement in the cutoff frequency results. The numerical results demonstrating this effect are presented. View full abstract»

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  • Comment on "Evaluation of transient response"

    Publication Year: 1970, Page(s): 143
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (126 KB)

    It is suggested that Thomson's recursive formulas are more general than originally indicated. These formulas have also been derived by Kaufman, but for a more general case and using a different approach. View full abstract»

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Editor-in-Chief
H. Joel Trussell
North Carolina State University