ON THE PARAMETER-IDENTIFICATION OF ELASTOMECHANICAL SYSTEMS USING WEIGHTED INPUT AND MODAL RESIDUALS

Parameter estimation by means of the method of least squares leads, in the case of linear elasto-mechanical systems, to nonlinear estimators if the output errors are used for the residuals, in which the measurement errors in general are assumed to be white noise. Linear estimators can be obtained if use is made of generalized models, i. e. of generalized errors (equation errors). In this paper input errors and the equation errors from the eigenvalue equation (according to the elasto-mechanical model) are taken for input residuals and modal residuals respectively, in order to obtain linear estimators in the frequency domain.