On a modification of the extremal shift method for a second-order differential equation in a Hilbert space

V. I. Maksimov<sup>ab

a</sup> Institute of Mathematics and Mechanics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^b Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg

Abstract: A problem of tracking a solution of a second-order differential equation in a Hilbert space by a solution of another equation is considered. It is assumed that the first (reference) equation is subject to the action of an unknown control, which is unbounded in time. In the case when the current states of both equation are observed with small errors, a solution algorithm stable with respect to informational noises and computational inaccuracies is designed. The algorithm is based on N.N.Krasovskii's extremal shift method known in the theory of guaranteed control.

Keywords: tracking a solution, extremal shift, second-order equation.

UDC: 517.977

Received: 05.02.2015

 English version: Proceedings of the Steklov Institute of Mathematics (Supplement Issues), 2016, 293, suppl. 1, S137–S147

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