Title:Analysis of an hydraulic switching converter with analog hysteresis feedback controlAuthor(s):Philipp Zagar, Rudolf ScheidlAbstract:Hydraulic switching converters control a hydraulic state, such as pressure or flow rate, by the frequent switching of on- off valves in combination with some hydraulic inductance element and means to flatten pulsation due to switching. In nearly all modern versions of such converters the switching is provoked by electrically actuated valves. The historically first of such converters, Montgolfier’s hydraulic ram, used a hydraulic feedback mechanism, because of lacking electrically controlled valves in his time. To make use of the significant cost advantage of pure hydraulic control, authors studied a concept for a buck converter for pressure control based on a specific feedback mechanism. In a theoretical analysis it turned out that this system exhibits a clustering of switching activities in certain operation domains which causes a bad pressure control performance. This paper analyses the essential inner mechanisms responsible for the operational performance and shows how to efficiently calculate approximate stability bounds in state space by using reduction methods.Booktitle:ENOC 2022 - 10th European Nonlinear Dynamics Conference, July 17-22, Lyon, France.Page Reference:2 page(s)Publishing:7/2022