Scientific Heritage

AUTHORS:

F. Donati, D. Carlucci

TITLE:

Control of norm uncertain systems.

JOURNAL:

IEEE Transactions on Automatic Control, vol.20-AC, 1975, pp.792- 795

ABSTRACT:

This short paper is concerned with the output feedback control design of norm uncertain systems. The formulation of the uncertainty in norm is explained and its relevance to many practical cases is shown. The possibility of obtaining less uncertain outputs of the plant by means of suitable output feedback controls is investigated.

AUTHORS:

F. Donati, M. Vallauri

TITLE:

Guaranteed control of almost- linear plants.

JOURNAL:

IEEE Transactions on Automatic Control, vol. 29- AC, 1984, pp. 34-41

ABSTRACT:

Considering the uncertainty which affects any description of actual plants and considering the fact that a feedback control does not require a very accurate knowledge of the plant behavior, the problem is examined to determine the largest simplification and inaccuracy of the model admissible for a guaranteed feedback control design. Sufficient conditions are derived. The foundations of a closed-loop control with guaranteed maximum error are then established. Finally, the design principles for the state observer and for the control are presented. Plants mhich can be modeled by hear systems for the purpose of feedback control are defined as "almost-linear".