05.00.00 Technical science
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REDUCTION OF INRUSH CURRENT FOR INDUCTION MOTORS WITH CHANGING PARAMETERS OF A STATOR WINDING
DescriptionThe schemes of the stator winding with double-wide-phase zone, allowing limiting the level of inrush current of induction motors without breaking the circuit power are presented in the article
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EXPLAINING RATIONAL PARAMETERS OF DISK ELEMENTS OF UNDERMINING WORKING BODIES IN A POTATO HARVESTER
DescriptionThis article discusses the results of the studies of the faculty and the staff of Ryazan State Agrotechnological University named after P.A. Kostychev confirmed with RF patents
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DEVICE FOR ELECTROMAGNETIC TREATMENT OF RAW MEAT AND STARTER CULTURES
DescriptionIn the article we present the results of working out the device for electromagnetic processing of meat raw materials and starting cultures. The device’s key parameters are resulted; the choice of parameters of electromagnetic processing of meat raw materials and starting cultures is proved
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Description
The analysis of models is carried out from a definition position for system of optimum control of drilling of basic mathematical model on which calculation of optimum regime parameters is possible. The main equation for management of process of drilling of wells is the mathematical model of mechanical speed of a driving as function from axial load of a chisel, the speed of rotation of a chisel and a consumption of boring solution for cleaning of a well of destroyed breed. Key parameter is axial load of a chisel; graphically dependence of speed of drilling on loading has S appearance - a figurative curve of Bingham which has a convex mathematical extremum. In the article, domestic and foreign models of drilling are considered; their schedules according to skilled data of conducting of wells are constructed. Models are sedate, i.e. reflect only a linear site of a curve of Bingham, data of trade drilling is well approximated with initial and linear sites of curves. Thus, on them it is possible to make only rational management of process, and the optimum mode exists only on border of range of definition of function. Only the A.A. Pogarsky model is suitable for optimum control, having a mathematical maximum and S-shaped form of a curve. All models depend on two parameters of management – load of a chisel and speeds of rotation of a chisel and don't consider the third on influence on drilling speed parameter - a consumption of boring solution. Therefore, Pogarsky's model was finished by inclusion in it in an explicit form of a consumption of boring solution. Check of model by means of the regression analysis of skilled data of drilling from official reports of drilling foremen showed its reliability for 71-99%. The model allows carrying out optimum control of drilling in the "axial load of a chisel" parameter
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SIMULATION OF PHOTOVOLTAIC MODULES CHARACTERISTICS IN MATLAB/SIMULINK
DescriptionThe necessity of an exact determination of their parameters and characteristics appear in the connection with the extension of the sphere of application of solar photovoltaic modules in some cases. It is reasonable to use the method of computer modeling for the analysis of characteristics of specific solar modules at different levels of illumination and values of temperature. In the article there was presented the order of working out of a simulation model of photovoltaic modules in the medium Matlab/Simulink. The simulation model is based on the basis of pentaparametric analytical model of the volt-ampere characteristics of a solar cell. The worked out model allows to research the volt-ampere and volt-watt characteristics of solar modules in dependence on levels of intensity of solar radiation, temperature, values of short-circuit current, tension of single step, internal resistances of solar elements and a diode parameter as well. The discrepancy of data of results of modeling with technical characteristics does not exceed 7%
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DISTRIBUTION OF SEEDS WITH A PULSE SOWING DEVICE
DescriptionIn the article we consider experimentally-theoretical questions of distribution seeds with a pulse sowing device in laboratory and field conditions
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INSPECTION OF THE TECHNICAL CONDITIONS OF THE “ROSTOV SEA” RESERVOIR DAM TO ASSESS ITS SAFETY
DescriptionCalculation of the dam destruction risk due to filtration processes is made. Calculation algorithm of the destruction risk of a uniform ground dam is worked out. Recommendations on the improvement of the dam technical conditions are given
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Description
In the article, the way to solve the problem of use of energy of a waste waterway for the purpose of reception of the additional electric power, taking into account ecological factors, is offered. The offered way consists in application of the developed design of hydroelectric power station
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BASES OF CALCULATION OF INDICATORS OF RELIABILITY OF ELEMENTS
DescriptionIn the article we have presented the models of refusals and restoration of the power transformer, the model of refusals and restoration of the automatic switch, the model of refusals and restoration of an air-line of electricity transmissions; we have also made conclusions for the presented models and offers for introduction in manufacture
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AGROTECHNICAL EFFICIENCY OF THE COMBINED SOIL-CULTIVATING UNIT
DescriptionIn the article, we have stated the agro-technical requirements to a pre-seeding processing of soil. The results of experiments of the combined soil-cultivating unit are resulted. Operating modes of the unit with optimum width of capture, uniformity of a surface of soil, quality of crushing the soils meeting agro-technical requirements are proved