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Аналіз об’єкта керування для розробки системи автоматичної стабілізації завантаження молотарки зернозбирального комбайну
(ЦНТУ, 2025) Дідик, О. К.; Сербул, О. М.; Тесля, С. В.; Didyk, О.; Serbul, O.; Teslya, S.
В статті приводиться аналіз об’єкта керування, розглядаються фактори, що ускладнюють досягнення максимальної якості стабілізації завантаження молотарки, серед яких розглядаються динамічні характеристики елементів об’єкта керування, динамічні характеристики збурень, що діють на об’єкт керування. This article provides an analysis of the control object, considers factors that complicate the achievement of maximum quality stabilization of the threshing machine loading, including the dynamic characteristics of the elements of the control object, the dynamic characteristics of the disturbances acting on the control object.
Метод синтезу оптимального багатовимірного фільтру для виділення регулярного сигналу на фоні випадкових перешкод
(ЦНТУ, 2021) Осадчий, С. І.; Дідик, О. К.; Сербул, О. М.; Каліч, В. М.; Osadchiy, S.; Didyk, O.; Serbul, O.; Kalich, V.
В даній статті приводиться дослідження можливості застосування комплексування вимірювальної інформації в умовах, коли корисна інформація являє собою вектор регулярних сигналів, а завади вимірювання – багатовимірний стаціонарний випадковий процес. In terms of [1] we formulate the problem of synthesis of a complex system of allocation of a useful regular signal. Suppose that a multidimensional stationary filter best processes the input information about the same regular signal r(t), which is obtained by several "non-ideal" meters, and the result is transmitted to the evaluation system. In this article, a multi-channel measurement system, which is connected to the input of a multidimensional data transmission system, the dynamics of which is described by a system of linear differential equations. The input of the measuring system receives an n-dimensional vector of measured signals r (t), the components of which are deterministic functions. The vector r (t) belongs to the main group of "non-ideal" meters. Measurements are accompanied by interference, which is a random stationary process with zero mathematical expectation and a known fractional-rational matrix of spectral densities. An integral indicator of the quality of the system is the sum of the weighted integral quadratic error of the regular signal estimation and the variance of the random component of the error. Thus, a new algorithm for the synthesis of a complete optimal regular signal extraction system against the background of a multidimensional stationary random interference is obtained, which allows to find the structure and parameters of a multidimensional optimal filter taking into account the dynamics of the information transmission system.
Система автоматичного регулювання співвідношення тверде/рідке в млинах з циркулюючим навантаженням
(ЦНТУ, 2021) Кондратець, В. О.; Сербул, О. М.; Дідик, О. К.; Мацуй, А. М.; Kondratets, V.; Serbul, O.; Didyk, O.; Matsui, A.
В статті приведені проміжні результати розробки і випробування системи автоматичного регулювання співвідношення тверде/рідке в кульових млинах, що працюють зі спіральними механічними класифікаторами в замкнутому циклі. The operation of a ball mill operating in a closed loop with a spiral classifier depends on the vacuum of the pulp in it, which is characterized by a solid / liquid ratio. Supply to the entrance of the ball mill at the same time ore and sand classifier, as well as changes in the circulating load in a wide range greatly complicate the definition of this technological parameter. This situation has led to the fact that the solid / liquid ratio in mills operating in such conditions can not be automatically adjusted, in turn, the deviation of the pulp vacuum from the required value leads to significant losses. The study of the ball mill as a controlled object on the pulp vacuum channel made it possible to describe it using the mathematical expression given in the article. The solution of this expression makes it possible to characterize the change in the mass of the material in the mill over time, provided that a stepwise action is introduced at the entrance - the volume flow of water or ore. A constant value of the mass of material in the mill will clearly characterize the corresponding solid/liquid ratio. It has been found that it is important to study the filtering capabilities of the control object, as control actions on water and disturbing actions on ore can significantly change the vacuum of the pulp in some areas of the mill. The filtering capabilities of the mill can be investigated by its amplitude frequency characteristics, which showed that at low circular frequencies the amplitude frequency characteristics depend on the mode of operation of the mill - the magnitude of the circulating load and the cost of the source ore. Using computer technology, spatial diagrams of the relative oscillations of the mass of material in the mill from the amplitude and frequency of influences at its entrance through the ore and water. In the course of theoretical research it was determined that the only approach to ensure the required accuracy of determining the solid / liquid ratio in these conditions is to filter the signals before applying to the input of the identification unit of the ratio. Thus, the system of automatic control of the solid/liquid ratio at the entrance to the mill is implemented on microprocessor means. Its operation on the laboratory test bench made on the microcontroller showed high accuracy of stabilization of technological parameter, reliability in various conditions of change of characteristics of input signals.

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