Charles, Guy, Dixon, R. and Goodall, Roger M. (2008) Least Squares Method Applied to Rail Vehicle Contact Condition Monitoring. In: Proceedings of the 17th IFAC World Congress, 2008. International Federation of Automatic Control, pp. 7451-7456. ISBN 9783902661005
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Abstract
The dynamics of a railway vehicle are driven by the geometry and conditions at the wheel-rail contact. Typically the condition and shape of the wheel and rail are monitored separately and off line. The work presented here is part of ongoing research into on-line model-based estimation of parameters in the wheel-rail contact dynamics. This paper outlines a practical approach to estimating a nonlinear function within a dynamic system by using a piecewise cubic functions. The parameters for the cubic functions are estimated with a least squared approach applied to the dynamic measurements taken from the system. A simplified plan-view wheelset and suspended mass model is introduced to use as an application of this technique. A contact geometry term, conicity, which is a nonlinear function of the relative lateral wheel-rail position, is included in the rail vehicle model. The conicity is successfully estimated using the least-squares method outlined in the paper.
Item Type: | Book Chapter |
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Subjects: | T Technology > TF Railroad engineering and operation |
Schools: | School of Computing and Engineering School of Computing and Engineering > Institute of Railway Research |
Depositing User: | Cherry Edmunds |
Date Deposited: | 12 Jul 2013 11:50 |
Last Modified: | 28 Aug 2021 19:51 |
URI: | http://eprints.hud.ac.uk/id/eprint/17946 |
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