The Control Under Uncertainty Conditions: History and Perspective

Within a problem of control of dynamic plants under uncertainty are considered both classical methods of the theory of systems with variable structure, and their modern development in the form of the theory of new types of feedback. The exact structure of feedback in control variable structure systems is clarified. Existence of two types of feedback is revealed: one classical feedback by the general regulation error, and another, new type, the coordinate-to-operational feedback. Thus feedback is responsible for a set of positive dynamical properties for control variable structure systems. Also the perspective directions of further development of the theory of new types of feedback are considered. In particular, methods of simultaneous control by families of dynamic plants are considered are considered.