Автоматика / Automatiсs
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Item A model for calculating the variable composition of gaseous fuels(Видавництво Львівської політехніки, 2018-09-18) Brunetkin, O. I.; Maksymov, M. V.; Odessa National Polytechnic UniversityA model for calculating the variable composition and enthalpy of gaseous fuels during the process of their burning is proposed. The stability of solving this problem is shown. By solving the direct and inverse problems, the adequacy of the result obtained with the original data is shown.Item About the nature of universality of methods of combinatorial optimization(Видавництво Львівської політехніки, 2018-09-18) Timofeeva, N. K.; International Scientific and Training Center for Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of UkraineIt is shown that the universality of combinatorial optimization methods is related to the fact that the problems of this class are characterized by similarity, due to which they are solved by one method or modification of the same algorithm.Item Adaptive pseudoinverse model-based control of some memoryless SIMO and MIMO systems(Видавництво Львівської політехніки, 2018-09-18) Zhiteckii, L. S.; Solovchuk, K. Yu.; Int. Centre of Information Technologies and SystemsThis paper deals with the robust adaptive control of discrete-time multivariable memoryless systems having non-square gain matrices of full rank. The main feature of these systems is that the number of outputs exceeds the number of control inputs. To cope with the parameter uncertainty, an adaptive version of the so-called pseudoinverse model-based approach is advanced. Asymptotic properties of a new adaptive control algorithm first proposed are established. Simulation results are given to demonstrate these properties.Item Algorithm of control systems required accuracy providing under the undetermined external disturbances(Видавництво Львівської політехніки, 2011) Zbrutskyi, O.; Zagirska, I.; Stetsenko, T.New control algorithm and algorithm for providing required quality are defined. It based on comparison the forecast system condition, allowance conditions value, dynamic system properties and undetermined external disturbances compensation.Item An adaptive digital controller for satellite medium power DC/DC converter(Видавництво Львівської політехніки, 2011) Skup, Konrad R.; Grudziński, Paweł; Orleański, OrleańskiIn this paper the work concerning an adaptive digital controller for satellite medium power DC/DC converters is presented. The adaptive techniques and methods developed in Space Research Centre allows an implemented in VHDL controller to modify its parameters according to detected changes in operating conditions. Inductor entering from discontinuous to continuous current mode and vice versa or moving sampling instants due to changes in duty time are good examples of varying operation conditions. The paper describes these methods based on 750 buck converter equipped with designed digital controller.Item Application of capacity sensors for monitoring the quality of drinking water(Видавництво Львівської політехніки, 2018-09-18) Vanko, Volodymyr; Lviv Polytechnic National UniversityThe research of a model solution and two different water samples using a capacitance plane converter is considered. Based on the critical analysis of the results, an approach based on the operator method is proposed. This allows, together with the imitative method, to obtain more complete information about the samples under study.Item Application of Proteus VSM software to simulate logarithmic analog-to-digital converter with successive approximation(Видавництво Львівської політехніки, 2011) Szcześniak, AdamThis article is a presentation of the application of Proteus VSM software to computer simulation of the logarithmic analog-to-digital converter (LADC) with successive approximation. For the chosen parameters of converter structure, the simulation with chosen capacitance of accumulative capacitors has been conducted.Item Application of pulse-width modulator for thermal plant control(Видавництво Львівської політехніки, 2018-09-18) Fedoryshyn, R. M.; Savytskyi, V. K.; Pistun, Y. P.; Klos, S. R.; Lviv Polytechnic National UniversityThe quality of transient processes in an automatic control loop based on PID controller with PWM is analyzed and compared to the quality in the system based on a switch controller.Item Automation of compound feed production(Видавництво Львівської політехніки, 2018-09-18) Markopolskyi, V. O.; Matus, S. K.; Stetsenko, A. M.; National University of Water and Environmental EngineeringThe paper suggests an improved algorithm of compound feed production line operation in Demetra private company, located in the village of Boikima in the Rivne region; software and hardware for the upper and lower levels of the automated control system has been developed.Item Basic requirements to channel-forming equipment at mobile missile systems automation(Видавництво Львівської політехніки, 2018-09-18) Serbin, V. V.; Taraskin, N. V.; Sukhyi, V. V.; Yuzhnoye State Design OfficeWhen creating the missile units automated control systems, the information-management aspects emerge to prominence. Functional integration of all control means in order to increase the effectiveness of missile system employment is possible only on the basis of accomplishing the tasks of scientific-methodological and organizational-technical improvement of control system of missile unit forces and facilities and information support of command personnel decision-making system. The article deals with the basic requirements to channel-forming equipment that is installed on missile unit control means and fire means.Item Computational analysis of method of detecting of periodic points in nonlinear dynamical systems(Видавництво Львівської політехніки, 2018-09-18) Franzheva, E. D.; Odessa National Polytechnic UniversityThe problem of detecting of non-stationary periodic points of nonlinear dynamical systems is considered in this work. A new approach has been suggested for the constructing of delayed feedback. Effectiveness of this approach is shown on the basis of results of constructed examples.Item Controller-optimizer of ball mill performance(Видавництво Львівської політехніки, 2011) Pistun, Ye.; Zahray, V.; Fedoryshyn, R.This work is dedicated to regulator-optimizer ball drum mills to increase energy and economic efficiency of grinding material (coal, clinker, etc.). Developed regulatory optimizer provides continuous monitoring of key parameters of milling process (ventilation, drainage and grinding performance, load, mill, etc.), and optimization of mill grinding for maximum performance.Item Cитуаційний центр управління проблемною кредитною заборгованістю(Видавництво Львівської політехніки, 2011) Кльоба, Л. Г.; Кльоба, В. Л.; Кльоба, Р. Л.The paper proposes practical recommendations for use by commercial banks to improve situational centers of bad loans for credit transactions.Item Device for measuring the temperature of rotating objects(Видавництво Львівської політехніки, 2018-09-18) Stepanyak, M. V.; Stepanyak, M. M.; Lviv Polytechnic National UniversityThe bench is proposed and studied using crystal-optical converters for the temperature of rotating objects.Item Errors in the measurement of small phase shifts with binary sampling(Видавництво Львівської політехніки, 2018-09-18) Buchma, Ihor; Lviv Polytechnic National UniversityIn this report the errors of the measurement phase shift between the harmonic signals using binary sampling are analyzed. The main source of errors in such measurementі is the inequality of signal amplitudes. We determined four methods of measuring the phase shift whose we are considering here. The mathematical models of additive errors for various methods were determined and a their comparative analysis is carried out. The graphs of dependences of errors on amplitudes inequality are constructed. The method that provides the least error is determined.Item Estimation of the structure of the mixed forest stands of Stryisko-Syanska Verkhovyna using gis technologies(Видавництво Львівської політехніки, 2018-09-18) Korol, M.; Havryliuk, S.; Tokar, O.; Vovk, O.; Kolyasa, L.; Ukrainian National Forestry University; Lviv Polytechnic National UniversityThe spatial structure of the old-growth mixed forest stands of Stryisko-Syanska Verkhovyna was studied using state-of-the-art approaches and GIS technologies. Thematic maps of the spatial structure of the forest plantations were developed.Item Flow velocity measurement in open channels using computer vision(Видавництво Львівської політехніки, 2018-09-18) Muran, R. O.; National university of water and environmental engineeringIn this paper author describes new approach to flow velocity measurement in open channels by utilizing components of computer vision. Placing an obstacle in the open channel creates different turbulence zones around it, and one of them is a wave in front of an obstacle. By connecting the height of the wave in front of an artificial obstacle with flow velocity in the open channel author uses methods of computer vision for experimental proves of suggested method credibility.Item Fuzzy regulator synthesis in microclimate control system in the greenhouses(Видавництво Львівської політехніки, 2018-09-18) Pylypenko, O.; Dudnyk, A.; Zaets, N.; Lysenko, V.; NULESThe cultivation of vegetables in а closed ground is getting more and more development. For year-round supply of fresh vegetables to the population around many large cities and industrial centers, large greenhouses have been established and the volume of construction of various cultivation facilities is increasing every year. In the design and construction of a variety of cultivation facilities, the main task is to create an artificial climate inside them, which will provide the optimal conditions necessary for the normal development and high productivity of crops. It is proposed to use a fuzzy regulator in order to increase the efficiency of vegetable production in greenhouses.Item Identification of drones in a defined territory(Видавництво Львівської політехніки, 2018-09-18) Nakonechnyy, A.; Berezhnyi, I.; Lviv Polytechnic National UniversityDifferent modern methods of detecting drones, which are based on various physical principles of signal transformation and processing, are examined and analyzed. The system of identification of drones is proposed, the basis of which is the analysis of signals of vibration and oscillations of the body. The work of the system is based on the processing of signals in time-frequency, wavelet area. After the identification of the drone is given a method of creating interference and interception, to further eliminate it.Item Improvement of control system for pH of ammonium nitrate solution(Видавництво Львівської політехніки, 2018-09-18) Krykh, H. B.; Matiko, H. F.; Stasiuk, I. D.; Lviv Polytechnic National UniversityThe features of pH control in the process of neutralization of ammonium nitrate are considered. The control system is proposed that ensures the technological requirements for providing a desired pH value.