Wiener-Hammerstein Benchmark , Report no. LiTH-ISY-R-2910

This paper describes a benchmark for nonlinear system identi cation. A Wiener-Hammerstein system is selected as test object. In such a structure there is no direct access to the static nonlinearity starting from the measured input/output, because it is sandwiched between two unknown dynamic systems. The signal-to-noise ratio of the measurements is quite high, which puts the focus of the benchmark on the ability to identify the nonlinear behaviour, and not so much on the noise rejection properties. The benchmark is not intended as a competition, but as a tool to compare the possibilities of di erent methods to deal with this speci c nonlinear structure.