Va. Baturin et Ev. Goncharova, Improvement method based on an approximate representation of the reachableset. The relaxation theorem, AUT REMOT R, 60(11), 1999, pp. 1536-1544
A method of successive improvement of a controlled process based on the ide
a of local approximation of the reachable set is considered. A condition gu
aranteeing the relaxation property of resulting algorithms is derived; rela
tions between this condition and a necessary condition for optimality are s
tudied for a problem with no constraints on the control.