CoA. ASAE Reports (1966-1969)https://dspace.lib.cranfield.ac.uk/handle/1826/106522024-03-29T11:16:40Z2024-03-29T11:16:40ZThe experimental determination of tyre model parametersEllis, J. R.Frank, F.Hinton, B. J.https://dspace.lib.cranfield.ac.uk/handle/1826/106742019-02-09T19:03:23Z1966-09-01T00:00:00ZThe experimental determination of tyre model parameters
Ellis, J. R.; Frank, F.; Hinton, B. J.
SUMMARY
This report describes the analysis of a series of experiments on pneumatic tyres
which were designed to test the various hypotheses: regarding the deformed shape of a
tyre during the steering process.
The experiments consisted of several separate tests first described in Ref. 1 and 2.
a) The application of a point lateral force or a moment at one position on the tread band
which is restrained at the centre of the wheel, and the measurement of the resulting
lateral deflection of each point of the tyre perimeter.
b) The application of a uniform force around the tyre perimeter on a hollow cylindrical
former and applying a load at the centre of the wheel.
c) Direct determination of tread band tension by cutting the tread band and bridging the
cut by a dynamometer.
d) Estimation of the bending modulus of the tread band by test on sections cut from the
tread band.
The analysis of the experiments is carried out by first transforming the test results
into a Fourier series and determining the spectral content of the bending line with an
harmonic analysis. Transfer functions of beam and string models are derived and applied
to the test results. A method of considering a three parameter model is described.
1966-09-01T00:00:00ZThe digital simulation of a turbo-charged diesel engineShroff, H. D.Hodgetts, D.https://dspace.lib.cranfield.ac.uk/handle/1826/106642019-02-09T19:02:17Z1969-01-01T00:00:00ZThe digital simulation of a turbo-charged diesel engine
Shroff, H. D.; Hodgetts, D.
A mathematical simulation of a six cylinder four stroke water cooled diesel
engine is described and then used to study the changes in performance caused by
variations of engine paramters and operating conditions. The results are discussed
with reference to the mathematical model employed and the physical system.
A limited study, to demonstrate the applicability of the simulation, considers
the optimisation of a variable geometry system to achieve a performance target.
1969-01-01T00:00:00Z