Wiener models of direction-dependent dynamic systems

Direction-dependent dynamic systems are defined, and Wiener models for them are described. For first-order systems with pseudo-random binary inputs, optimising the model parameters by cross-correlation function matching methods based on analysis gives excellent results. For first-order systems with inverse-repeat pseudo-random binary inputs, optimisation by discrete Fourier transform matching and output matching methods also give excellent results. These optimisation methods may be extended to directiondependent dynamic systems that cannot be analysed, as illustrated by a first-order system with a pseudo-random ternary input, and a second-order system with an inverse-repeat pseudo-random binary input. Copyright © 2002 IFAC