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Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry

Issue 5 • Date Nov. 1952

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Displaying Results 1 - 17 of 17
  • The analysis of sampled-data systems

    Publication Year: 1952, Page(s):225 - 234
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (715 KB)

    THERE is an important class of feedback control systems known as sampled-data systems or sampling servomechanisms in which the data at one or more points consist of trains of pulses or sequences of numbers. Such systems may have a variety of forms, a common example of which is shown in Figure 1. In the case illustrated, the sampling is performed on the control error by a so-called sampler which is... View full abstract»

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  • Electrification of Holland's railway system

    Publication Year: 1952, Page(s):235 - 244
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1674 KB)

    The railways of the Netherlands were almost totally destroyed at the close of World War II. This provided an opportunity to change from the former system of electrification at a minimum cost if desired. Reaffirming the earlier decision to electrify with the 1,500-volt d-c system, remarkable rehabilitation has taken place and electrification is being extended rapidly. Thus, 7 years after the cessat... View full abstract»

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  • Analogue methods for optimum servomechanism design

    Publication Year: 1952, Page(s):244 - 250
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    Optimum design of servomechanisms based on the criterion of minimizing the integral of squared error for representative inputs has been discussed by Hall,1 Phillips,2 and others. Investigations of related criteria, the mean-square and mean-absolute error for a square-wave input, are described in this paper. Experimental results on simulated second- and third-order servomechanisms check closely wit... View full abstract»

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  • Analogue computers for feedback control systems

    Publication Year: 1952, Page(s):250 - 254
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB)

    Feedback control design is passing into a third stage of development as the systems become more complicated, less subject to linear treatment, and more susceptible to noise problems. This article is a review of analogue computers which are useful in studying involved linear systems and those which do not lend themselves to direct mathematical analyses. View full abstract»

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  • A block-diagram approach to network analysis

    Publication Year: 1952, Page(s):255 - 260
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (365 KB)

    BLOCK diagrams have been used for many years to facilitate planning of assembly lines, chemical processes, and complicated electric and electronic systems. More recently, block diagrams have been used extensively in the study of automatic control systems involving electric, mechanical, hydraulic, pneumatic, optical, and other elements. By means of transfer functions, the blocks are used to represe... View full abstract»

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  • Progress in applications of electrical engineering to air transportation

    Publication Year: 1952, Page(s):261 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1147 KB)

    APPLICATIONS of electrical engineering to air transportation encompass almost all the various phases of electrical engineering: lighting, communications, electronics, rotating machinery, switch-gear, batteries, and so forth. The modern aircraft may have as many as 400 separate pieces of electric equipment, adding up to over 100 kilowatts of installed load; and may have three or four separate elect... View full abstract»

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  • Electric lighting in the first century of engineering

    Publication Year: 1952, Page(s):269 - 291
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1398 KB)

    THIS centennial year is a fitting time to set down a few of the historical facts regarding the men and the events that created and expanded the production and application of electric light as a science, an art, and an industry. Here, too, are recorded observations on the impact electric lighting has had upon our lives. View full abstract»

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  • Feedback control systems with dead-time lag or distributed lag by root-locus method

    Publication Year: 1952, Page(s):291 - 296
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (417 KB)

    A FEEDBACK control system is composed of a group of elements, which may be electrical, hydraulic, pneumatic, and so forth, whose behavior may be linear or nonlinear. The analysis and synthesis of a feedback control system with linear elements which can be described by a linear differential equation with constant coefficients have been well developed. In such analysis and synthesis, the term "trans... View full abstract»

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  • Lead networks utilizing a saturable core memory

    Publication Year: 1952, Page(s):297 - 302
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    AUTOMATIC feedback control systems have been deeply explored and widely discussed throughout the literature. This paper will discuss special circuits which are peculiarly adaptable to such systems. In particular, if the system is of the type employing a modulated carrier signal, it is possible to nullify completely the effect of a simple time lag by inserting nonlinear circuit configurations which... View full abstract»

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  • Vacuum-tube techniques applied to a hydraulic amplifier

    Publication Year: 1952, Page(s):302 - 306
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB)

    SCIENCE endeavors to describe large numbers of situations observed in nature by the simplest and most general theory. The more generally applicable a theory, the more useful and highly regarded it becomes. View full abstract»

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  • Voltage rating versus horsepower of synchronous and induction motors

    Publication Year: 1952, Page(s):306 - 311
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (530 KB)

    EVERY industrial plant of any size today has two or three utilization voltages, any one of which is available for supplying motors. The maximum primary distribution voltage within the plant buildings may be any voltage up to 15 kv, the maximum standard being 13.8 kv. Thus a choice must be made as to the most desirable voltage rating for the various motor ratings. Many factors must be considered if... View full abstract»

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  • Stabilization of a servomechanism subject to large amplitude oscillation

    Publication Year: 1952, Page(s):312 - 324
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    The saturation of an amplifier is found to cause large amplitude oscillations in a conditionally stable servomechanism. The employment of a suitable nonlinear element in the stabilizing network may prevent such oscillations. For a particular system containing a saturable amplifier, frequency response analyses are used to find the magnitude and frequency of the oscillation and to determine the desi... View full abstract»

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  • The use of graphite anodes for cathodic protection of the bottoms of inactivated ships

    Publication Year: 1952, Page(s):324 - 329
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (710 KB)

    THE FIRST large scale experimental application of graphite anodes and an impressed current to cathodically protect the bottoms of inactive ships was planned by the United States Maritime Administration (U.S.M.A.) in 1949 as a result of discussions with National Carbon Company representatives. View full abstract»

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  • Synthesis of feedback control system by phase-angle loci

    Publication Year: 1952, Page(s):330 - 339
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    THE synthesis of a feedback control system by means of phase-angle loci originates from Evan's root-locus method1 which enables one to find all possible roots of the characteristic equation of a feedback control system. Once the roots are chosen, the transient response then may be worked out. Thus, it allows the synthesis of feedback control system in time domain. However, the plotting of the root... View full abstract»

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  • Signal component control

    Publication Year: 1952, Page(s):339 - 343
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    THE proposed AIEE symbols and definitions for feedback control systems1 will be employed throughout this paper except for one omission and two additions. It will be assumed that the command signal is received with suitable magnitude and in appropriate electrical, mechanical, or other physical form so that the ¿reference input elements¿ will be omitted, although the term ¿reference input¿ will ... View full abstract»

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  • Residential heat pump experiments in Philadelphia ¿¿ Earth as a heat source

    Publication Year: 1952, Page(s):343 - 350
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (689 KB)

    This paper summarizes ground coil performance during two heating seasons at Whitemarsh and Lansdowne. There are also derived certain approximate relationships which should be useful for designing ground coils for other situations. View full abstract»

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  • Measurement of cathodic protection currents from sacrificial anodes

    Publication Year: 1952, Page(s):350 - 352
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    THE measurement of currents and voltages in low-energy circuits always presents certain difficulties. The presence of the measuring equipment causes changes in the circuit parameters, and even though an exceedingly accurate instrument is used, the instrument reading may be far from the true value obtained when the instrument is not present. View full abstract»

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Aims & Scope

This Transaction ceased production in 1963. The current retitled publication is IEEE Transactions on Industry Applications.

Full Aims & Scope