AN ADAPTIVE SERVOMECHANISM FOR A CLASS OF INFINITE-DIMENSIONAL SYSTEMS

A universal adaptive controller is constructed that achieves asymptoti c tracking of a given class of reference signals and asymptotic reject ion of a prescribed set of disturbance signals for a class of multivar iable infinite-dimensional systems that are stabilizable by high-gain output feedback. The controller does not require an explicit identific ation of the system parameters or the injection of a probing signal. I n contrast to most of the work in universal adaptive control, this pap er is based on an input-output approach and the results do not require a state-space representation of the plant. The abstract input-output results are applied to retarded systems and integrodifferential system s.