Adaptive control of a class of nonlinear discrete time systems application to a heat exchanger

A class of non linear discrete time systems which has a continuous-time counterpart and the capability of describing plants having a dynamics which depend upon the operating point is considered. For this class of non linear discrete time systems, which can be expressed in input-output form, linearizing output feedback control strategies have been developped. Adaptive algorithms allowing to directly estimate the controller parameters are proposed. This approach is applied to the adaptive control of a heat exchanger nonlinear model.