Technical Reports

Rail Vehicle Dynamics Model Validation

  • 01
  • Aug
  • 1981
AUTHOR: Steven E. Shladover, Russell L. Hull
OFFICE: RPD
REPORT NUMBER: FRA/ORD-81/52
SUBJECT: Facilities & Test Equipment, Evaluation
KEYWORDS: Rail Vehicle Modeling, Rail Vehicle Testing, Perturbed Track Tests
ABSTRACT: The validation of mathematical models of rail vehicle dynamics using test data poses a, number of difficult problems, which are addressed in this report. Previous attempts to validate rail vehicle models are reviewed critically, and experience gained in validating dynamic models of aircraft and marine vehicles using system identification methods is then applied to the formulation of a general procedure for validating rail vehicle dynamic models. The procedure is outlined, step by step, for application with existing test data and for use as part of a new model validation test program. An example of the application of the initial stages of the procedure is demonstrated using data from the Perturbed Track Tests (PTT) at Pueblo to validate a-simple linear model of the forced vertical dynamics of a six-axle locomotive. Recommendations are offered for the conduct of future model validation efforts.

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