Browsing by Author "Ftorek, Branislav"

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    Kinematická analýza rovinného paralelného mechanizmu s tromi vodiacimi reťazcami s neidentickou štruktúrou
    (University of Žilina, 2025) Michalková, Mária; Guldan, Vladimír; Ftorek, Branislav
    In this paper, we analyse the mobility of a planar parallel mechanism with three serial chains. The serial chains consist of three joints with one degree of freedom (rotational and translational), but with a different arrangement or combination of the mentioned joints. Using the Screw theory concept, there is investigated the mobility of the end effector, and the direct and inverse problem for the speeds is formulated, as well. Further, we deal with the occurrence of singular positions of such a mechanism.
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    Model nelineárneho oscilátora
    (University of Žilina, 2024) Minárik, Ján; Ftorek, Branislav; Chupáč, Radoslav
    This article deals with a simple nonlinear model of mechanical system. Nonlinear mechanical model described by a nonlinear system of differential equations can lead to interesting phenomena. The linearized analytical solution is compared with the numerical solution obtained by the Runge-Kutta method in the MATLAB environment.
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    Parametricky modulovaný oscilátor v asymptotickom prípade
    (University of Žilina, 2024) Minárik, Ján; Ftorek, Branislav; Chupáč, Radoslav
    This article deals with the asymptotic solution in analytical form of some second-order linear differential equation with time-dependent parameters. Time-periodic modulation of the parameters of the oscillatory system can lead to interesting phenomena. The analytical solution is compared with the numerical solution obtained by the Runge-Kutta method in the MATLAB environment. The convergence conditions of this analytical method are discussed.