Litteris et Artibus
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Item Development of mathematical model of controlled plant using the obtained experimental data(Lviv Polytechnic Publishing House, 2016) Fedoryshyn, Roman; Klos, Sviatoslav; Savytskyi, Volodymyr; Lviv Polytechnic National UniversityThe results of the experimental study of the dynamical and static properties of an electric oven as a controlled plant are presented in the paper. Up-to-date microprocessor instruments were applied during the experiments. Mathematical model of the electric oven was developed on the basis of the experimental data. The adequacy of the model was verified.Item Analysis of pulse-width modulation methods(Видавництво Львівської політехніки, 2017-12-23) Fedoryshyn, Roman; Klos, Sviatoslav; Lviv Polytechnic National UniversityThe purpose of this work is to present the results of analysis of pulse-width modulation methods, i.e. PWM based on the sawtooth waveform generator and PWM based on an integrator and a switch element. Mathematical formulae for designing the tuning parameters of PWM diagrams are presented. An example of PWM application for controlling a thermal plant is presented.Item Mathematical modeling and experimental study of impulse lines of flowmeters(Lviv Polytechnic Publishing House, 2015) Fedoryshyn, Roman; Matiko, Fedir; Kostyk, Ihor; Stefurak, Khrystyna; Lviv Polytechnic National UniversityMathematical model of an impulse line with a pressure transducer (PT) was built. This model provides the possibility to simulate and analyze the transient processes in an impulse line. Experimental studies of the step response curves of an impulse line with PT were carried out with application of a high-frequency analog-to-digital converter of the pressure signal in the PT chamber. The simulated step response curves were compared to the experimental ones. Maximum relative deviation of the simulated step response curves from the experimental ones is 6.3 %.