Abstract: Owing to the switching nature of power electronic systems, the dynamic behaviors of these systems are generally nonlinear. It’s a good approach to modeling dynamic nonlinear systems using nonlinear system identification. Compactly supported orthogonal wavelets have certain properties useful for system identification. This paper proposed an identification scheme for dynamic nonlinear system model using Haar wavelet. Simulation result for PWM boost DC-DC converter shows the validation of this scheme.

Keywords: Wavelet theory, Multi-resolution, Nonlinear system identification.