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Closed loop control of finite element model in magnetic system
No full textThis paper presents an axisymmetric formulation of the circuit-coupled finite element method embedded in closed loop control system. The controller checks the current of the coil of the magnetic system after each time step and controls the applied voltage to reach the steady state faster. The results of the voltage driven finite element model are compared with the results from the analytical model. The control parameters for the proportional-integral-derivative controller were estimated using the step response of the system. Furthermore, the results of the closed loop system simulation show why the model accuracy is important in the controller design
On the algebraic Lyapunov inequality
No full textConsidering the continuous algebraic Lyapunov inequality and equation PA + A*P<0 , PA + A*P=Q, the aim of this paper is to give an algebraic proof of the Lyapunov theorem through mathematical induction. Moreover by the presented algorithm all positive definite solutions of the Lyapunov equation are given in the case, if the right hand side is negative definite
Töredék, kódex, rítus, hagyomány : A Zalka Antifonále győri és modori töredékeinek tanúsága
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The rise of modernity: the relation of religion, capitalism and democracy in the European context
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Application of an integrated hydrological model at the Southern Trans-Tisza region of Hungary as part of a conceptual phosphorus transport model framework
No full textAn integrated hydrological model has been applied for small rural-urban catchments at the Tisza-Maros confluence using the WateRisk integrated hydrological model system. The aim of the hydrological simulations was to identify the role that the relief plays in the runoff generation process, and to highlight the relationship between the precipitation, runoff and the depression’s water storage of the relief. The overall aim is to support the description of contaminant (phosphorus) transport processes with knowledge about the rainfall-runoff-storage relationship, described with the complex deterministic hydrodynamic model system. To support this aim the rainfall-runoff and the one-dimensional flow routing modules have been used in the model. Results suggest that the depletion of the surface depressions water storage capacity is a non-linear saturation type function of the amount of rainfall falling on the surface. Manning n values of the drainage channel system might also have strong influence on runoff dynamics
Material properties of adhesives for shear bonded connections of structural glass
No full textThanks to intensive research in the field of polymer adhesives in the last few years, there is a possibility of using a glued joint with a real load bearing role. The reliability of adhesive in the connection during the lifetime of a structure is affected by many factors, but the initial choice of a proper adhesive material is the most crucial one. The article deals with the experimental analysis focused on the determination of material characteristics of adhesives in planar connections, it describes the effect of various factors on the behavior of an adhesive joint under increasing loads, its ultimate bearing capacity and its failure modes. The main investigated factors are the type of adhesive, the type of connected materials (material of substrate), surface treatment and the thickness of the adhesive layer. A special part of the article describes numerical models of a glued joint with respect to different types of adhesive
Defining correlation between modal-split and transportation infrastructure and mobility services with the analysis of travel plans
No full textIn the recent years the Author participated in two Intelligent Energy Europe projects, which aim was to deliver transport-sector energy savings by creating travel plans. During the development of the projects two local travel plans were worked out, one for the residential area of Győr-Ménfőcsanak, Hungary and one for the elementary educational institutions of Győr. In 2012 additional travel plans were developed, this time for other target groups, one for the universities of Győr, and another one for the employees of three public institutions. The main objective of these studies was to reduce the problems, caused by private car users and more over to promote sustainable mobility choices for target groups. The results of the projects showed, that travel plans are effective tools in order to solve mobility challenges in a sustainable way, but transportation infrastructure and services have strong effect on the success of travel plans
