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Electrical Engineers, Proceedings of the Institution of

Issue 6 • Date June 1979

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Displaying Results 1 - 25 of 34
  • Manoeuvre handling in a multiradar a.t.c. system

    Publication Year: 1979, Page(s):469 - 475
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (671 KB)

    This paper describes an approach to the detection of turns in a radar tracking system and discusses some of the difficulties encountered in a multiradar system when using more conventional manoeuvre detectors with ¿-ß or Kalman filter trackers. Typical aircraft tracks are presented to illustrate the improvements possible using the approach described. View full abstract»

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  • Probability density function for the indications of a 2-axis monopulse radar operating in the presence of system noise, clutter and interference

    Publication Year: 1979, Page(s):476 - 480
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (670 KB)

    A 2-axis sum-and-difference monopulse radar incorporating a signal processor which is close to optimum is considered to operate in an environment consisting of a Rayleigh fluctuating target and an arbitrary spatial distribution of fluctuating sources of clutter and intereference or jamming. The bivariate probability density function for the system indications, one for each axis, is derived and som... View full abstract»

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  • Improvement of slow-rate f.s.k. by frequency agility and coding

    Publication Year: 1979, Page(s):481 - 486
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (941 KB)

    An f.s.k. signal keyed at 75 bauds with 850 Hz frequency shift, can have one of several frequency allocations within any given h.f. voice channel. In the presence of interference from other users, the f.s.k. system performance may be improved by choosing the f.s.k. tone frequencies before message transmission, to correspond to frequencies within the voice channel where the interference is least. T... View full abstract»

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  • G.T.D. solution of slot admittance on a cone or cylinder

    Publication Year: 1979, Page(s):487 - 492
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (560 KB)

    The input admittance of an elemental radiator on a curved surface, e.g. a slot on a cone, plays an important role in the design of conformal arrays. A search through the literature reveals that, at present, there is no reliable theoretical method available for computing this admittance. The objective of this paper is to provide a solution to this problem using a surface-ray approach¿within the fr... View full abstract»

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  • Thyristor-controlled quadrature boosting

    Publication Year: 1979, Page(s):493 - 498
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (707 KB)

    With reference to the conventional quadrature booster transformer, this paper describes a way of achieving continuous phase-shift control based on point-on-wave thyristor switching. The proposed unit can provide continuous and practically instantaneous power-transfer control in transmission circuits. The theoretical waveforms are verified by experimental tests and computer studies. Consideration i... View full abstract»

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  • Application of optimisation techniques to the design of very-high-voltage power lines

    Publication Year: 1979, Page(s):499 - 505
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (742 KB)

    The economy of u.h.v. lines is of such importance that it is essential to select the parameters which decide its cost in a most careful way. Therefore, the application of optimisation techniques to the design of a transmission line has been considered. A nonlinear algorithm, using the concept of n.l.p. algorithm, and a mathematical representation of the line have been developed. View full abstract»

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  • Soil thermal and hydrological characteristics in designing underground cables

    Publication Year: 1979, Page(s):506 - 516
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1201 KB)

    In the present paper, the thermal and hydrological characteristics of the soil surrounding buried cables are investigated. First, the dependence of the soil thermal resistivity on two easily measurable parameters is shown. These parameters are the porosity and the saturation degree. The soil hydrological stability is then investigated and is found to be governed by one hydrological parameter only;... View full abstract»

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  • Performance and computational requirements of new piecewise load flow algorithm

    Publication Year: 1979, Page(s):517 - 519
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (301 KB)

    The summary discusses the computational aspects and requirements of load flow solution methods. In particular, new piecewise solution technique is considered. In the new algorithm, based on the Newton-Raphson method, the Jacobian is block diagonalised according to chosen subsystems, and the voltage correction vectors of the respective subsystems are solved independently. The effects of interconnec... View full abstract»

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  • Transient analysis and performance of crossbonded cable systems

    Publication Year: 1979
    IEEE is not the copyright holder of this material | PDF file iconPDF (194 KB)
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  • Reply: Transient analysis and performance of crossbonded cable systems

    Publication Year: 1979, Page(s):519 - 520
    IEEE is not the copyright holder of this material | PDF file iconPDF (312 KB)
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  • Use of triacs in naturally commutated cycloconvertors

    Publication Year: 1979, Page(s):520 - 521
    IEEE is not the copyright holder of this material | PDF file iconPDF (192 KB)
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  • Plugging of capacitor motors

    Publication Year: 1979
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | PDF file iconPDF (106 KB)
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  • Reply: Plugging of capacitor motors

    Publication Year: 1979
    IEEE is not the copyright holder of this material | PDF file iconPDF (106 KB)
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  • Erratum: Plugging of capacitor motors

    Publication Year: 1979
    IEEE is not the copyright holder of this material | PDF file iconPDF (42 KB)
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  • Discrete first-order models for multivariable process control

    Publication Year: 1979, Page(s):525 - 530
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (692 KB)

    The concept of an m×m invertible continuous first-order lag is extended to define an equivalent formulation for multivariable sampled-data systems. A large class of proportional-plus-summation-output feedback controllers is constructed. Each controller guarantees the stability of the closed-loop system and, also, low-closed-loop interaction effects if the sampling rate is high enough. The results... View full abstract»

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  • Dielectric breakdown of supercritical helium

    Publication Year: 1979, Page(s):532 - 536
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (658 KB)

    The paper reports the results of an experimental investigation into the dielectric-breakdown behaviour of super-critical helium, in the range from 4.2 to 30 K and 0.4 to 1.5 MPa under d.c., a.c. and standard impulse voltages, to assist the development of superconducting power cables. At helium densities above 80 kg m¿3, the uniform-field breakdown voltage for d.c. or a.c. is about 55 MV m¿1 at 0... View full abstract»

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  • Editorial

    Publication Year: 1979
    IEEE is not the copyright holder of this material | PDF file iconPDF (143 KB)
    Freely Available from IEEE
  • Compensation theory of multivariable root loci

    Publication Year: 1979, Page(s):538 - 541
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (451 KB)

    By regarding system compensation as the manipulation of the asymptotic directions and pivots of the root locus of the closed-loop multivariable system, the paper describes a general framework for the construction of forward path and minor loop compensation elements for a square, invertible plant with a transfer-function matrix G(s). The approach is based on the use of dynamic transformations of G ... View full abstract»

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  • Theory and practice of the characteristic locus design method

    Publication Year: 1979, Page(s):542 - 548
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (682 KB)

    Recent work on the application of complex-variable theory to the analysis of linear multivariable systems has led to a design philosophy that integrates the frequency-response and the root-locus approach. A brief discussion of the 2-stage design technique that derives from this philosophy is first undertaken, and its application to a 3-input/3-output model of a once-through boiler is considered. O... View full abstract»

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  • Pole assignment

    Publication Year: 1979, Page(s):549 - 554
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (644 KB)

    The problem of pole assignment using state feedback or output feedback is examined. A new algorithm for the design of fullrank minimum degree output-feedback compensators is presented, and results in a unification of previously obtained results. View full abstract»

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  • Algebraic-function theory in the analysis of multivariable feedback systems

    Publication Year: 1979, Page(s):555 - 562
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1002 KB)

    The `characteristic locus design method¿ is essentially a complex-variable approach, which relies heavily on algebraic-function theory for its rigorous foundation. In the paper, a summary is given of results developed during the past three years from an algebraic-function theoretic approach to the analysis of multivariable feedback systems. View full abstract»

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  • Dyadic expansions and their applications

    Publication Year: 1979, Page(s):563 - 567
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (704 KB)

    This is an expository paper devoted to surveying and explaining some of the basic concepts required, and the motivations for, the definition and use of dyadic expansions in systems analysis and controller design. Where possible, the material is related to the inverse Nyquist array and characteristic locus design methods. View full abstract»

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  • Sequential design of linear multivariable systems

    Publication Year: 1979, Page(s):568 - 572
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (653 KB)

    The paper describes and critically assesses, in the light of recent advances, the sequential return difference method for the computer-aided design of linear multivariable control systems. In this method, a sequence of single-loop designs, using classical procedures, yields a multivariable design satisfying various criteria such as stability, disturbance attenuation, low interaction and integrity. View full abstract»

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  • Computer-aided design of control systems via optimisation

    Publication Year: 1979, Page(s):573 - 578
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (869 KB)

    The paper describes a computer-aided-design procedure which may be used to design, inter alia, multivariable control systems which satisfy constraints on peak overshoot of step response on control magnitudes, control rates and on states, as well as conventional constraints. View full abstract»

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  • New formulation for the method of inequalities

    Publication Year: 1979, Page(s):579 - 584
    Cited by:  Papers (20)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (939 KB)

    A new version of the method of inequalities is developed for the design of feedback control systems that have nonlinear and multivariable characteristics and are subject to disturbances. The system is required to behave in accordance with a criterion which takes the form of a prescribed bound on each component of the error vector. View full abstract»

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Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

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