A. I. Deryagina
Department of Theoretical
cybernetics of the
Saint-Petersburg state university.
E. E. En'kova
Department of Theoretical
cybernetics of the
Saint-Petersburg state university.
B. M. Sokolov
Department of Theoretical
cybernetics of the
Saint-Petersburg state university.
The problem of adaptive control of system of nonlinear ordinary differential equations is considered. The раrt of state of it is not observed. It is proved, that the nonlinear observer based on a method of recurrent target inequalities is effective in this case.