Mechanical systems and signal processing vol:16 issue:5 pages:785-801
In  the measurement and modelling of linear systems in the presence of non-linear distortions has been studied for a special class of periodic excitation signals. This paper extends the theory of  to more general classes of (periodic) excitation signals. Also, enhanced properties of the best linear approximation and the stochastic non-linear distortions are obtained. The theory is illustrated on a simulation and a real measurement example. (C) 2002 Elsevier Science Ltd. All rights reserved.