Frequency Response Function modeling of nonlinear convergent systems

Frequency response techniques are one of the popular analysis and design approach, which are highly useful in providing a frequency domain perspective on the performance of dynamical systems. This function under harmonic excitation can be generated either from measured data or from an analytical function. However, derivation of an analytical expression of frequency response for nonlinear systems is a challenging problem. In this paper, we perform the nonlinear Frequency Response Function (FRF) modeling of a class of nonlinear systems using nonlinear function approximation methods.