TY - GEN KW - Differenciálegyenlet A1 - Bartha Ferenc A. A1 - Krisztin Tibor ID - acta58145 UR - http://acta.bibl.u-szeged.hu/58145/ N2 - We consider a system of equations describing automatic position control by echo. The system can be reduced to a single differential equation with state-dependent delay. The delayed terms come from the control mechanism and the reaction time. H.-O. Walther [Differ. Integral Equ. 15(2002), No. 8, 923?944] proved that stable periodic motion is possible for large enough reaction time. We show that, for sufficiently small reaction lag, the control is perfect, i.e., the preferred position of the system is globally asymptotically stable. N1 - Bibliogr.: 16. p. ; összefoglalás angol nyelven EP - 16 TI - Global stability in a system using echo for position control Y1 - 2018/// AV - public SN - 1417-3875 SP - 1 ER -