relation: http://acta.bibl.u-szeged.hu/58145/ title: Global stability in a system using echo for position control creator: Bartha Ferenc A. creator: Krisztin Tibor description: 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. date: 2018 type: Folyóirat type: NonPeerReviewed format: part language: hu identifier: http://acta.bibl.u-szeged.hu/58145/1/ejqtde_2018_040.pdf identifier: Bartha Ferenc A.; Krisztin Tibor: Global stability in a system using echo for position control. (2018)