Abstract
Generalized Predictive Control (GPC) utilizing information on predicted future controlled variables of the controlled object has been proposed and has become of major interest. Some points are left unclear, for example, relation between the control system performance and the parameters of performance index employed has not been cleared in the GPC system and the GPC system is not always stable.
In this paper, preview servo system design method for the ARMAX by means of principle of optimality is proposed. This system is always guaranteed to be stable, and desirable number of preview steps and asymptotical properties of the control system are theoretically derived.
Using the result of this preview servo system, GPC system is constructed by means of principle of optimality.
Relation between the preview servo system and GPC system is examined to obtain properties of the preview servo system as compared with GPC system.
