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Digital Library of the
European Council for Modelling and Simulation |
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Title: |
Validation
Of Unstable Discrete Event Models |
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Authors: |
Hans-Peter Barbey |
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Published in:
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(2011).ECMS
2011 Proceedings edited by: T. Burczynski, J. Kolodziej, A. Byrski, M. Carvalho. European Council for Modeling and Simulation. doi:10.7148/2011 ISBN:
978-0-9564944-2-9 25th
European Conference on Modelling and Simulation, Jubilee Conference Krakow,
June 7-10, 2011
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Citation
format: |
Barbey, H.-P.
(2011). Validation Of Unstable Discrete Event Models. ECMS 2011 Proceedings
edited by: T. Burczynski, J. Kolodziej,
A. Byrski, M. Carvalho
(pp. 569-572). European Council for Modeling and Simulation. doi:10.7148/2011-0569-0572 |
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DOI: |
http://dx.doi.org/10.7148/2011-0569-0572 |
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Abstract: |
Logistic systems can be designed
as a push-system or a pull-system. In a pull-system one parameter e.g. the
stock items has to be close-loop controlled. It will be shown that the
close-loop controlled model can work in an unstable manner like a “logistic
oscillating circuit”. In comparison with a close-loop controlled electronic
system the elements of a logistic system have relatively long dead times. In
discrete event simulation there is no method to optimally calculate the
parameters of the system also taking account of the dead times. Furthermore,
there is no validation technique to date, which can determine the unstable
behavior of the system. In many different areas of engineering the FFT-
analysis is a frequently used method. It will be shown that the FFT analysis
is a suitable method to determine the unstable behaviour
of discrete event simulation models. However, FFT analysis is only a method
to determine the unstable behaviour; the
elimination can only be done by trial and error. |
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