Computer Science, Information Technology, Automation最新文献

{"title":"INVARIANT SYSTEM OF AUTOMATIC STABILIZATION OF LIQUID FLOW RATES WITH PRESSURE VARIATION IN THE PIPELINE","authors":"V. Kondratets, O. Serbul","doi":"10.31721/2414-9055.2019.5.1.45","DOIUrl":"https://doi.org/10.31721/2414-9055.2019.5.1.45","url":null,"abstract":"The aim of the work is the development of an invariant system of automatic stabilization of liquid flow rates with a relative error not exceeding ± 1,0%, during fluctuations in pressure in the supply main with simultaneous reduction of its dimensions and material consumption. The research methods used in the work are as follows: methods of the hydraulics theory; methods of the automatic control theory; methods of analysis; modelling methods; methods of the theory of errors, methods of probability theory and mathematical statistics. Academic novelty lies in the fact that for the first time an invariant system of automatic stabilization of liquid flow compensates the negative influence of pressure fluctuations in the main line and, thus, provides high accuracy of functioning, is realized. Practical significance of the performed studies is high, since the obtained results make it possible to stabilize the flow of water into the sand chute of a mechanical single-spiral classifier quite simply and with sufficient accuracy. It allows to stabilize the pulp discharge in a ball mill and significantly improve the efficiency of its operation. The invariant system of automatic stabilization of the liquid flow rate contains a vertical uniflow hydraulic converter, an input pipe and a cylindrical float, which serves as a regulator. The system provides a water flow of 24,3 m3/h with a relative error of ± 0,85%.","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124479485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TO THE PROBLEM OF FORMALIZATION OF MANAGER PARAMETERS FOR THE DEVELOPMENT OF AUTOMATED CONTROL SYSTEM BY ENERGY FLOWS OF IRON ORE MINES","authors":"I. Sinchuk, V. Fedotov, O. Dozorenko","doi":"10.31721/2414-9055.2019.5.1.4","DOIUrl":"https://doi.org/10.31721/2414-9055.2019.5.1.4","url":null,"abstract":"Purpose: development of theoretical aspects for the formalization of control parameters of the target function of the algorithm functioning of the automated control system (ACS) of energy flows of iron ore mines. Methods: in this article, the method used for the main components, the method of «compression» of the outgoing information. Scientific novelty: the method of forming the target function as an input parameter for the operation of the algorithm of control of electric power flows of iron ore mines is developed. Practical significance: the tactics of the formation of input parameters for the operation of the scheme of the ACS of power flows is developed. Results: the article presents the aspects of theoretical justification for the creation of a method for optimal management of electric power flows of iron ore mines by introducing an automated power flow control system. It is noted that the expected level of electrical energy efficiency of iron ore raw materials (IORM) in the conditions of underground iron ore enterprises is achievable by introducing in their practice the work of the ACS general energy flows in general and the ACS in the electric power flows in particular. To develop the structure of the ACS it is necessary to have real control parameters and levels of influence on them of a complex of technological factors of enterprises. Existing theoretical methods do not allow obtaining the required quality of such factors. It has been proved that the amount of electricity consumed by modern iron ore enterprises has changed little over the years, but tariffs for consumed energy are constantly increasing. This leads to an increase in the cost of extraction of this type of minerals. According to the protocols of the contracts for payment for consumed electricity, generating companies set for consumers daily tariffs for the released electricity. The daily electricity tariffs are used as inputs for the target function to obtain formula-solutions for minimizing the price according to the existing daily tariffs and maximize the change in the electrical loads of energy consumers in the preferential periods of the day. In the scenario of the electric power industry of iron ore mines of the Kryvyi Rih iron ore basin, the possibility of applying theoretical justifications for modelling the modes of electric streams in the hours of the day with the subsequent inclusion in the algorithm of the functioning of the ACS power flows is shown. The methodology of further formalization of control parameters for the development of an ACS by energy flows of iron ore enterprises is proposed. This approach allows, by compaction of experimental data, and without introducing system-leading influential simplifications into the process of this process, to form input parameters for the development of an algorithm for the functioning of ACS by the energy flows of these types of enterprises.","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127255249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AUTOMATED CONTROL SYSTEM FOR ALTERNATIVE ENERGY SUPPLY OF A MINING ENTERPRISE","authors":"V. Morkun, O. Savytskyi, S. Ruban","doi":"10.31721/2414-9055.2019.5.1.35","DOIUrl":"https://doi.org/10.31721/2414-9055.2019.5.1.35","url":null,"abstract":". The article discusses the possibility of using heat pumps for heat utilization of mine water and ventilation air.The use of a large number of pumps requires new approaches to their joint management.Very small number of works is devoted to the questions of supervisory control of heat pumps groups, which consist of heat pumps \"water - water\" and \"air - water\". The purpose of the work is to develop an automated control system for dispersed heat pumps according to the criterion of minimizing energy consumption. In the article the classical methods of parameters of the particular system analysis at one of the mines of KryvyiRih Basin and methods of the modern theory of automatic supervisory control of distributed systems were used. The processes visualization techniques considering a human perception and decision-making had also been applied when creating the human-machine interface of automated distributed system for utilization of low-temperature energy of mine water and ventilation air. Methods theoretical: analysis, generalization, systematization of legislative framework, Internet-sources in order to distinguish theoretical basis of research. Methods empirical: development of theoretical basics and simulation of the distributed system of automated control over thermal pumps in an underground mine. The scientific novelty of the research implies determination of basic principles of creating an efficient system of alternative power supply at underground iron ore mining enterprises by using thermal pumps. The practical significance of the research involves a feasibility study of the space-distributed structure of automated control over alternative power-supply sources.","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122498355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFICIENCY OF THESAURUS OF FACTUAL COLLOCATIONS OF PROFESSIONAL ONTOLOGY OF LINGUISTIC CORPUS OF POWER SYSTEM ACCIDENTS","authors":"I. Kotov, V. Trón, O. Serdiuk, O. Pylypenko","doi":"10.31721/2414-9055.2019.5.1.24","DOIUrl":"https://doi.org/10.31721/2414-9055.2019.5.1.24","url":null,"abstract":"","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134165368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SWITCHED RELUCTANCE MOTOR WIND GENERATOR SYSTEM","authors":"I. Kozakevych","doi":"10.31721/2414-9055.2019.5.1.63","DOIUrl":"https://doi.org/10.31721/2414-9055.2019.5.1.63","url":null,"abstract":"The work is devoted to the development of a control system for a wind generator with the use of a switched reluctance motor. The search for new structures for the construction of the power unit and control system of electromechanical systems of wind power complexes is an urgent task of today. The most common construction options for such systems include double-fed induction motors and permanent magnet synchronous generators. In the first case there is no possibility of full control of the flow of power transmitted to the network, and in the second case the main disadvantage is the high cost of such an electric machine, which is explained by the use of rare earth materials in its design. The use of a switched reluctance motor as a generator has significant differences compared to similar use of electric machines based on torque generation due to the Lorentz force. A mathematical model of the electromechanical system of a wind generator with a switched reluctance motor in the Matlab / Simulink environment was developed. It was shown by mathematical modeling that when changing the sign of load torque, the machine does not go into braking mode independently, as is the case with other electric machines. This creates considerable difficulties in the operation of such a system, since the transition to brake mode requires a change in control effects on the switched reluctance motor. Features of functioning of the switched reluctance motor in the mode of regenerative braking have been stated. The limits of change of control angles which allow to receive the maximum amount of the generated electric energy and reduction of pulsations of brake torque of the machine have been defined. The structure of the control system of a switched reluctance motor has been developed, which involves the use of a modified speed controller, which divides its output signal into a sign function, which is subsequently used to select the converter control angles, as well as the absolute value used in the operation of the modulation algorithm of the required current magnitude .","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131899836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DISINTEGRATION OF ORE FLOCCULES BEFORE FLOATATION CONCENTRATION ON THE BASIS OF DYNAMIC EFFECTS OF CONTROLLED HIGH-ENERGY ULTRASOUND","authors":"V. Tron, V. O. Ravinskaia, PrJSC “Poltavskii Gok”","doi":"10.31721/2414-9055.2018.4.2.40","DOIUrl":"https://doi.org/10.31721/2414-9055.2018.4.2.40","url":null,"abstract":"","PeriodicalId":250795,"journal":{"name":"Computer Science, Information Technology, Automation","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125762503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}