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Computing an initial estimate of a Wiener-Hammerstein system with a random phase multisine excitation

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2 Author(s)
P. Crama ; Fund for Sci. Res., Flanders, Belgium ; J. Schoukens

Wiener-Hammerstein systems consist of two linear dynamic systems placed around a static nonlinearity. These models are difficult to identify due to the presence of two dynamic systems. Usually, a nonlinear estimation procedure is necessary to estimate the parameters of the different parts. This nonlinear estimation procedure needs good starting values to converge quickly and/or reliably to a global minimum. This paper proposes a method to compute a first estimate based on one measurement record only.

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:54 ,  Issue: 1 )