# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 24 of 24
• ### Simple bound to the error probability in coherent multiphase phase-shift-keyed systems with intersymbol interference and gaussian noise

Publication Year: 1973, Page(s):725 - 732
Cited by:  Papers (2)
| | PDF (812 KB)

An upper bound to the probability of error in coherent multiphase phase-shift-keyed digital systems is derived. The union bounding technique and the Chernoff inequality are used in deriving the bound. The bound is general and its accuracy improves as the number of phases N and the signal/noise ratio increase. The bound is given only in terms of the envelope component of interfering pulses and it i... View full abstract»

• ### Transient in a single-server queuing system

Publication Year: 1973, Page(s):733 - 738
| | PDF (597 KB)

The paper presents a new approach, using the stochastic transition signal-flow graph, for the study of transient in a single-server queuing system with Poisson input, first-come first-served queue discipline. A complete solution is obtained for the state probabilities of the system. Furthermore, the probabilities of waiting and loss, as well as the waiting-time distribution, are determined. The sy... View full abstract»

• ### Application of a 'Zwischenmedium' to the radiation from a flanged waveguide

Publication Year: 1973, Page(s):739 - 740
Cited by:  Papers (2)
| | PDF (217 KB)

The range of application of the orthogonal expansion for solving boundary-value problems is considerably extended by introducing a suitable ZwischenmediumÂ¿. The radiation problem considered in this paper is solved using a cylindrical ZwischenmediumÂ¿. Field matching on the surface of the `ZwischenmediumÂ¿ leads to an infinite system of linear equations for the unknown coefficients of the field ... View full abstract»

• ### Antennas employing conical dielectric horns. Part 1: Propagation and radiation characteristics of dielectric cones

Publication Year: 1973, Page(s):741 - 749
Cited by:  Papers (4)
| | PDF (932 KB)

An approximate theory for the propagation and radiation characteristics of dielectric cones is developed. A formulation in terms of spherical modes is used in the interior of the cone, and boundary conditions are applied so that the field exterior to the cone has surface-wave properties. The propagation and radiation characteristics are found to resemble closely those for corrugated horns, and exp... View full abstract»

• ### Antennas employing conical-dielectric horns. Part 2: The Cassegrain antenna

Publication Year: 1973, Page(s):750 - 756
Cited by:  Papers (7)
| | PDF (857 KB)

A design theory is presented for Cassegrain antennas employing dielectric-cone feeds. A modal approach is used to describe the aperture field over the subreflector, while a ray-optics method is employed to determine the sub-reflector profile and main-reflector aperture distribution. Experiments have been made with antennas designed for operation over bands centred near 11 and 18 GHz, and results a... View full abstract»

• ### Method for predicting the dynamic response of a variable-reluctance stepping motor

Publication Year: 1973, Page(s):757 - 765
Cited by:  Papers (6)
| | PDF (1150 KB)

A method is described for predicting the index response of a reluctance-type stepping motor from the results of static tests at the machine terminals. The method involves solving the system equations by numerical integration once an equivalent circuit representing one phase of the motor has been obtained. To obtain this circuit requires (a) representation of the flux linkages of one phase as a fun... View full abstract»

• ### Waves in the periodic overhead-conductor systems of electrified railways

Publication Year: 1973
| | PDF (190 KB)

The interaction between overhead conductor and pantograph is analysed by the use of the theory of waves in periodic systems composed of discrete elements. The equations of motion are linearised, and each of the identical spans is represented by only two masses. A 2-fold infinity of critical speeds is to be expected for a continuous cable, although only a few critical speeds are significant in prac... View full abstract»

• ### Generalised theory of induction motors with asymmetrical airgaps and primary windings

Publication Year: 1973, Page(s):767 - 775
Cited by:  Papers (13)
| | PDF (1155 KB)

The paper develops an analysis of induction machines with any number and configuration of stator windings, and a general nonconstant airgap. The analysis involves resolution into harmonic series, together with matrix inversions. It is ideally suited to solution by digital computer. The work is supported by experimental evidence from a variable-gap shaded-pole motor. View full abstract»

• ### Discussion on 'Computer method for design of electricity-supply networks'

Publication Year: 1973, Page(s):775 - 776
| PDF (395 KB)
• ### Submerged gas-circulator motors for advanced gas-cooled reactors

Publication Year: 1973, Page(s):777 - 785
| | PDF (1485 KB)

The paper, describes the historical background, development, design, execution and works' full-power full-pressure tests of submerged gas-circulator equipment rated 5 MW at 3000 rev/min for 11 kV, 50 Hz, 3-phase supply. The environmental requirements, due to the nuclear reactor, of 40 atm of CO2 with operation down to 1 atm of air, need careful consideration from various motor-design aspects: aero... View full abstract»

• ### Analogue modelling of thyristors

Publication Year: 1973, Page(s):786 - 788
Cited by:  Papers (2)
| | PDF (297 KB)

The paper is an applications report of an electronic model of an s.c.r.for use in predicting the conducting state of a thyristor. The model is entirely logical in operation, relies purely on voltage signals from the thyristor and does not depend on any current measurements in the main power system. This property allows the model to be used in thyristor arrangements without modification to the exis... View full abstract»

• ### Digital modelling of a thyristor

Publication Year: 1973, Page(s):789 - 790
Cited by:  Papers (2)
| | PDF (262 KB)

The paper outlines a logical model of a thyristor for use in digital simulation of silicon-controlled rectifier (s.c.r.) systems. The semi-implicit nature of the model is derived rigorously from Boolean principles, and its simplicity provides considerable advantage over other comparable arrangements. View full abstract»

• ### Fast digital computation of 3-phase thyristor bridge circuits

Publication Year: 1973, Page(s):791 - 795
Cited by:  Papers (28)
| | PDF (643 KB)

The paper describes a digital-computer solution for 3-phase thyristor bridge-rectifier circuits. To cope efficiently with the complex commutation conditions when the source impedance is significant, the solution is based on Kron's method of tensor analysis. Theoretical results are shown to compare closely with experimental results for the same circuit conditions. View full abstract»

• ### Power-system busbar impedance matrix by the method of structural numbers

Publication Year: 1973, Page(s):795 - 796
| PDF (247 KB)
• ### Suggested definition of reactive power for nonsinusoidal systems

Publication Year: 1973, Page(s):796 - 798
Cited by:  Papers (77)
| PDF (386 KB)
• ### Lur'e-type Lyapunov function for multimachine power systems

Publication Year: 1973, Page(s):798 - 799
| PDF (305 KB)
• ### Optimum Lyapunov functions and stability regions of multimachine power systems

Publication Year: 1973
| PDF (287 KB)
• ### Optical technique for measurement of current at high voltage

Publication Year: 1973
| PDF (134 KB)
• ### Dyadic approximation method for multivariable control-systems analysis with a nuclear-reactor application

Publication Year: 1973, Page(s):801 - 809
Cited by:  Papers (2)
| | PDF (867 KB)

A method is developed for the approximation of an NÃN plant transfer-function matrix by a transfer-function matrix consisting of the linear sum of N frequency-independent dyads with scalar transfer-function coefficients. The use of the approximation method in the design of failsafe feedback-control systems for the plant is described, and an application is suggested in the stabilisation of the rad... View full abstract»

• ### Low-sensitivity design of optimal linear control systems with transportation lag

Publication Year: 1973, Page(s):810 - 813
| | PDF (371 KB)

The design of low-sensitivity optimal linear control systems with transportation lag, which are relatively insensitive to parameter variations, is presented. The optimal control is with respect to a quadratic performance criterion which includes the state variable, control variable, state sensitivity function and control sensitivity functions as its arguments. A detailed example shows that the low... View full abstract»

• ### Describing functions, circle criteria and multiple-loop feedback systems

Publication Year: 1973
| PDF (128 KB)
• ### Erratum: Describing functions, circle criteria and multipleloop feedback systems

Publication Year: 1973
| PDF (128 KB)
• ### Influence of radiation on the sparkover of sphere gaps and crossed-cylinder gaps stressed with impulse voltages

Publication Year: 1973, Page(s):815 - 821
| | PDF (940 KB)

The influence of various forms of radiation on the sparkover characteristics of sphere gaps for 25, 50 and 75 cm-diameter spheres, and of crossed-cylinder gaps for 6.25 and 25 cm-diameter cylinders, has been studied when impulses of both polarities and waveshapes of 1/1000, 1/50 and 80/1000 Â¿s are applied. Radiation improves the accuracy with which the characteristics of such gaps may be determin... View full abstract»

• ### Dependence of loss on domain-wall spacing in polycrystalline material

Publication Year: 1973, Page(s):822 - 824
Cited by:  Papers (4)
| | PDF (523 KB)

Measurements of total power loss and domain-wall spacing have been made on individual grains in polycrystalline specimens of commercial grain-oriented 3% silicon-iron material. The loss per cycle versus frequency characteristic of a grain is found to consist of discrete linear portions, as distinct from the continuous function that has often been reported. These linear portions are found to corres... View full abstract»

## Aims & Scope

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

Full Aims & Scope