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Title: Model refinement using transient response

A method is presented for estimating uncertain or unknown parameters in a mathematical model using measurements of transient response. The method is based on a least squares formulation in which the differences between the model and test-based responses are minimized. An application of the method is presented for a nonlinear structural dynamic system. The method is also applied to a model of the Department of Energy armored tractor trailer. For the subject problem, the transient response was generated by driving the vehicle over a bump of prescribed shape and size. Results from the analysis and inspection of the test data revealed that a linear model of the vehicle`s suspension is not adequate to accurately predict the response caused by the bump.
Authors:
;
Publication Date:
OSTI Identifier:
584926
Report Number(s):
SAND--97-2744C; CONF-980224--
ON: DE98000846; BR: DP0101031; TRN: AHC29808%%66
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: 16. international modal analysis conference, Santa Barbara, CA (United States), 2-5 Feb 1998; Other Information: PBD: [1997]
Research Org:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; MATHEMATICAL MODELS; TRUCKS; LEAST SQUARE FIT; RESPONSE FUNCTIONS; NONLINEAR PROBLEMS; DATA COVARIANCES; PROBABILISTIC ESTIMATION; ROAD TESTS