To the conditions of existence of the systems that are absolutely invariant to nonmeasurable actions

Abstract

A special case of controllable objects is established, for which there exists a solution of the problem for design of deviation control systems that are invariant to an assigning action and nonmeasurable disturbances. In this case the contradiction is excluded between the stability and invariance of the system, which is inherent in controllable objects of the general kind; here there is no need to measure pure derivatives.