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.
Original language | English |
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Title of host publication | Proceedings of the 17th World Congress, International Federation of Automatic Control |
Publisher | Elsevier |
Pages | 7451-7456 |
Number of pages | 6 |
Volume | 41 |
Edition | 2 |
ISBN (Print) | 9783902661005 |
DOIs | |
Publication status | Published - 2008 |
Externally published | Yes |
Event | 17th World Congress, International Federation of Automatic Control - Seoul, Korea, Republic of Duration: 6 Jul 2008 → 11 Jul 2008 Conference number: 17 |
Publication series
Name | IFAC Proceedings Volumes (IFAC-PapersOnline) |
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Publisher | Elsevier |
Number | 2 |
Volume | 41 |
ISSN (Print) | 1474-6670 |
Conference
Conference | 17th World Congress, International Federation of Automatic Control |
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Abbreviated title | IFAC2008 |
Country/Territory | Korea, Republic of |
City | Seoul |
Period | 6/07/08 → 11/07/08 |