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Identification nonlinear dynamic systems based on Volterra polynomials with using polyharmonic test signals
(Національний технічний університет "Харківський політехнічний інститут", 2019) Lomovoy, V. I.; Pavlenko, V. D.
The method is proposed for constructing the Volterra approximation model of the nonlinear dynamical systems in the frequency domain using of the test polyharmonic signals of various amplitudes. The computational identification method is based on the use of the regularized least squares method and the choice of the optimal step size on amplitude of test signals. The accuracy and computational stability of identification method in the form of multidimensional amplitude-frequency and phase-frequency characteristics are investigated. The method improves an accuracy and stability of the identification procedure.