CoA. Notes: Electrical and Control Engineering (1961- 1969)
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Item Open Access Wideband measurement of transistor small signal parameters by time domain spectrometry(College of Aeronautics, 1969-04) Young, G. M.Time Domain Spectrometry (TDS) Methods are outlined and their application to measurement of transistor parameters is discussed. Experimental results are presented and the advantages and limitations of TDS methods are re-assessed. Future developments are suggested.Item Open Access Time domain and frequency domain measurement techniques(College of Aeronautics, 1969-01) Loeb, H. W.The principles underlying two distinct approaches to the measurement of electrical network characteristics over a wide frequency range are outlined, together with brief descriptions of currently available test systems which cover the range 0.1 - 4GHZ. The two techniques are assessed in terms of their ultimate capabilities with regard to accuracy, speed of measurement and costs.Item Open Access Superconductivity - some aspects of the theories and possible applications(College of Aeronautics, 1968-10) Hayden, J. T.Superconductivity is an effect exhibited by certain materials at very low temperatures in which normal electrical resistivity disappears completely. Summaries of the current theories which attempt to account for this phenomena are presented, and, various proposals for making use of this effect in practical devices are examined and discussed. Proposals for a programme of research in the application of superconductivity to rotating electrical machines are outlined.Item Open Access Proposals for a basic theory of air traffic control(College of Aeronautics, 1964-07) Lord, R. N.This note serves as an introduction to the work on Air Traffic Control currently being carried out at The College of Aeronautics. The basic principles of Air Traffic Control are examined and a mathematical basis for an analysis of the current and future ATC complex is discussed. The theory is based upon feedback control concepts using intermittent data. Examples showing the application to en-route airway and parallel track flying are given. These demonstrate the effect of positional data up-dating rate upon separation minima for both subsonic and supersonic aircraft. Application to both fixed route (Airway Control) and free-route (Area Control) are currently being considered. A full report is to be published at a later date.Item Open Access The realization of fourth-order rational transfer functions with adjustable coefficients(College of Aeronautics, 1963-06) Paul, R. J. A.Design techniques are described for the simulation of third-order and fourth-order rational transfer functions with adjustable coefficients. The realization procedure, which is based on the use of an ideal computing amplifier associated with linear passive R.C. two-port networks, is an extension of the methods described previously(1,2) for quadratic functions.