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

Issue 3 • Date July 1962

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Displaying Results 1 - 16 of 16
  • A graphical method of evaluating the describing function

    Publication Year: 1962, Page(s):101 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1204 KB)

    The describing function for a nonlinear element is evaluated from the nonlinear characteristic without going to the output waveform, and is shown to be a fraction of a certain area obtained by a simple graphical construction. The method is applicable to all nonlinearities. Phase shift, if any, is also determined in terms of areas. A template is suggested to speed up the graphical procedure. Simple... View full abstract»

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  • Computer solutions of algebraic equations

    Publication Year: 1962, Page(s):106 - 109
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (915 KB)

    Many engineers solve algebraic equations in a search for the roots of characteristic equations. Excluding very special analog computers, the three ways open in this direction are: paper-and-pencil computation; graphical root-locus technique; and the general-purpose digital computer. Unfortunately, there is a widespread misconception that hand computation requires approximate methods for any polyno... View full abstract»

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  • Design and synthesis methods for a class of multivariable feedback control systems based on single-variable methods

    Publication Year: 1962, Page(s):109 - 116
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1779 KB)

    A definition of noninteraction for a class of closed-loop multivariable control systems based on a small error matrix and high loop gains is proposed. It is shown that strong cross-coupling of the open-loop system is often necessary to realize the high gains. Methods of design based on single-variable methods are developed and numerous examples discussed. View full abstract»

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  • Cathodic protection of transmission and distribution underground cables

    Publication Year: 1962, Page(s):116 - 120
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1287 KB)

    This paper contains a brief description of the original 125-kv Somastic-coated pipe cable system of the Florida Power Corporation, and the additions to that pipe cable system. The graphite anode-rectifier type of cathodic protection system originally installed, and the deep ground bed-rectifier addition are discussed. Operation of the pipe cables is tied in with the type of cathodic protection ins... View full abstract»

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  • A new procedure for plotting phase plane trajectories

    Publication Year: 1962, Page(s):120 - 125
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1097 KB)

    A new procedure is developed for sketching the phase plane trajectories of second-order systems. This procedure is based on some extensions of Liapunov's second method of stability analysis, and allows these trajectories to be sketched with only a small amount of work. View full abstract»

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  • Minimizing integrals of absolute deviations in linear control systems

    Publication Year: 1962, Page(s):125 - 128
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB)

    A criterion function involving time integral of absolute deviations is considered. There are three critical regions in the time behavior of the desired function, r(t), and optimal policies are derived and discussed depending on the behavior of r(t) with respect to these three regions. An algorithm of shifting the origin to appropriate points in the time axis and restarting the process is provided,... View full abstract»

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  • A computer-oriented iterative design of linear control systems subject to open-and closed-loop specifications

    Publication Year: 1962, Page(s):129 - 132
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    An iterative technique is introduced which can be used to design on the digital computer a linear control system satisfying a set of performance specifications such as overshoot, peak time, settling time, velocity constant, bandwidth, etc., and incorporate a plant with a specified transfer function. The design is flexible in the number and nature of constraints used. It is nearly completely mechan... View full abstract»

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  • Report on reliability of electric equipment in industrial plants

    Publication Year: 1962, Page(s):132 - 151
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3420 KB)

    A knowledge of electric equipment reliability is required in the economic design of power distribution systems. An AIEE sponsored survey was undertaken in 1959 to collect reliability data in industrial plants. Responses were received from 33 companies, covering 85 plants in 5 industries. Survey results on 27 equipment items are shown in 46 tables. For each industry and for all data received, these... View full abstract»

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  • Application of the matrix methods to the optimum synthesis of multivariable systems subject to constraints

    Publication Year: 1962, Page(s):151 - 157
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1657 KB)

    Matrix methods are used to extend well-known concepts in single-variable systems to the case of systems with several inputs and outputs. The analysis of such multivariable systems, when subjected to deterministic and/or random inputs, is considered in the time and frequency domains. View full abstract»

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  • An adaptive control system with sinusoidal parameter perturbation

    Publication Year: 1962, Page(s):157 - 159
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (890 KB)

    An adaptive control system is analyzed in order to investigate system behavior. The system consists of a model system in parallel with a system whose parameters are adjusted or dithered sinus-oidally. The difference in output (error) of the two systems is squared and used as a performance criterion in optimizing the parameters of the adjusted system. It is shown that the deviation from the optimum... View full abstract»

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  • A new graphical method for feedback control system compensation design

    Publication Year: 1962, Page(s):160 - 166
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1537 KB)

    A new graphical method for feedback control system compensation design yields the parameters of simple compensators which will place a closed-loop pole at a designated location in the 5-plane with arbitrary open-loop gain. The gain limits for compensators with single or multiple identical sections are easily determined by this method, which is simple, easy to apply, fast, and accurate. Examples ar... View full abstract»

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  • Induction-motor model for industrial power system computations

    Publication Year: 1962, Page(s):166 - 172
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1532 KB)

    A mathematical model of the polyphase induction motor is developed, using nonproprietary data available from the manufacturer. Input impedance and output torque are expressed as tabular functions of speed, with voltage as a parameter. These functions are derived from current-dependent relationships, however, and include saturation effects. Examples illustrate use of the model in machine computatio... View full abstract»

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  • Automatic safety and vigilance control system for railroad locomotives and motor coaches

    Publication Year: 1962, Page(s):173 - 176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5193 KB)

    A new control system for locomotives and motor coaches which combines the features of the well-known safety or dead-man control with automatic supervision of the vigilance of the engineer is described. It is very effective, and considerably increases the safety of railroad operation. It can be installed on any kind of traction vehicle, and can be combined with other safety and protective devices. View full abstract»

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  • An introduction to the assessment of line-voltage thermostat performance for electric heating applications

    Publication Year: 1962, Page(s):176 - 183
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3356 KB)

    The key indexes of thermostat performance in electric heating systems are explained. Response, offset, cycle time, and droop are introduced, as are basic methods for their measurement in field and laboratory. Correlation of field and laboratory tests is outlined, and brief mention is made of the NEMA (National Electrical Manufacturers Association) test box. Modern thermostat components, such as sn... View full abstract»

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  • N. S. Savannah ¿¿ Electric system in the first merchant nuclear reactor system

    Publication Year: 1962, Page(s):183 - 193
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4151 KB)

    In addition to normal considerations for shipboard electric plants, the design for nuclear-powered merchant vessels is based on the need for an uninterrupted source of power. The installation of main, auxiliary, and emergency generating plants, the utilization of automatic devices for generator synchronizing and power source transfer, as well as the application of special interior communications a... View full abstract»

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  • Chemical-thermionic auxiliary power systems

    Publication Year: 1962, Page(s):193 - 196
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1067 KB)

    An analysis of the problems of matching the performance of a high-temperature plasma-thermionic static-energy conversion device to a heat source consisting of the combustion products of chemical fuels is presented. The thermodynamic relationships governing the efficiency and power densities of the thermionic converter as a function of cathode temperature and work function are established and the l... 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