Identification of Nonlinear Systems Structured by Wiener-Hammerstein Model

A Brouri (Moulay Ismail University)
S Slassi (Moulay Ismail University)

International Journal of Electrical and Computer Engineering
Vol 6, No 1: February 2016

Wiener-Hammerstein systems consist of a series connection including a nonlinear static element sandwiched with two linear subsystems. The problem of identifying Wiener-Hammerstein models is addressed in the presence of hard nonlinearity and two linear subsystems of structure entirely unknown (asymptotically stable). Furthermore, the static nonlinearity is not required to be invertible. Given the system nonparametric nature, the identification problem is presently dealt with by developing a two-stage frequency identification method, involving simple inputs.