Indirect Adaptive Control of Processes Satisfying the Classical Assumptions of Direct Adaptive Control

It is demonstrated that strict adherence to the Certainty-Equivalence Principle of indirect control is unnecessarily limiting. It is shown that only by discarding one of the principle's main tenets is it possible to obtain with indirect control, algorithms comparable to the classical algorithms of direct control. Two new indirect adaptive control algorithms are developed; each is applicable to processes satisfying exactly the same assumptions required by the classical algorithms of direct adaptive control.