ROBUST OBSERVERS FOR SYSTEMS WITH PARAMETERS

In many cases linear multivariable models which describe physical systems contain structured parametric type uncertainties. Specifically it may be that the state space model is expressed in a form which involves parameters. We first consider circumstances in which a parameter independent observer can be constructed for the system, and suggest conditions that guarantee its existence. We also give conditions under which such a robust observer can be subsequently used with additional dynamics in a parameter free configuration for regulation.