Vol 23, No 1 (2015)

Articles
METHODOLOGY OF TECHNICAL STATE CONTROL THE PHOTOSENSITIVE CCD MATRIX USING THERMAL IMAGER
Ahpolova E.A.
Abstract
The problem of the technical- state control of photosensitive CCDs used in optoelectronic converters for remote sensing of the Earth from a spacecraft is considered. The dependency of the thermal picture obtained from the chip surface, on the character and localization of the defect is shown. The method of estimation of technical condition by means of the thermal picture obtained by a thermal imager from the surface of the chip is proposed. The specific features of the thermal imager operation during the technical-state control of CCDs are presented. The way to determine the limiting values of the temperature range by the method of moments is discussed. A block diagram of hardware and software system for collection and processing of diagnostic information is described.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):8-12
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IMPROVING THE EFFICIENCY OF SMALL SOCIAL GROUPS FUNCTIONING TAKING INTO ACCOUNT A HUMAN FACTOR
Gerasimova I.B., Muhamedrahimova L.N.
Abstract
The paper considers the problem of increasing the efficiency of small social groups (SSG) functioning. In order to solve this problem, a cognitive dynamic model of SSG which is based on linear relationships is constructed. The model takes into account the psychophysiological compatibility of the members. Psychophysiological compatibility is certain combinations of temperament types which generate interpersonal attraction. Next the rate and sustainability of the SSG activity process are evaluated by means of computer simulation. At the same time, each person in the group is considered as capable of self-organization with his/her own temperament.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):13-20
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MODELING OF SYSTEM TIME SYNCHRONIZATION OF INFORMATION SYSTEMS OF ELECTRIC GRID COMPANY
Raguzin A.S., Gubanov N.G.
Abstract
The paper describes the construction of a functional model of an information-system time-synchronization system which is based on the NTP protocol. This system is optimal for time synchronization at the power utilities of a regional power network company. The notion of a basic model for a time-synchronization system is introduced. In the paper the mathematical modeling of the local time scale former at a system node, means of comparison for the time and their correction is carried out. The results obtained allow to choose the appropriate means which depend on the imposed requirements of accuracy and stability.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):21-28
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PARAMETRIC IDENTIFICATION OF COOLING SYSTEM OF HYDROELECTRIC GENERATING SET BEARING
Demidov Y.V., Shchetinin V.G.
Abstract
In the paper the control problem of states of cooling system of hydroelectric generating set bearing is considered. The followings are emphasized and described: purposes, design, operating principles of the bearing and its cooling system. By this purposes the problem of parametric identification of cooling system of hydroelectric generating set bearing is stated. As a sample the cooling system with 8 lubricating oil coolers, radially connected to discharge header of heat transfer with water as a liquid, is considered. The algorithm of identification of states is proposed and studied. As a corollary it is shown that the algorithm stated in the paper is usable for systems with another structure and purposes.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):29-34
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MODELS FOR RESEARCH OF MODERN MICROPROCESSORS
Efimushkina N.V.
Abstract
An approach to the development of state-of-the-art microprocessor simulation models is discussed. The models allow to estimate time characteristics of objects. For the identification of the influence of the most important factors on these characteristics, a simplified representation of the microprocessor structure is used. The microprocessors include one or several pipelines. The program which is simulated by the model, is presented in the form of a stochastic sequence of instructions. Among these instructions can be data or control conflicts, and also memory operations. The models allow to reveal the most effective structures and operating modes of the objects, and also collisions reducing their output. They are united in the package consisting of four programs developed under the leadership of the author.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):35-41
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YIELD OPTIMIZATION FOR THE AD NETWORKS
Elkin D.A., Minakov I.A., Volman S.I.
Abstract
The paper discusses an approach to enable complex analysis of all advertising campaigns taking place on an ad network and a method to increase the total profit of these campaigns. The method is based on linear programming and simplex-method theories but also includes some specific features of an online advertising domain. The paper describes the algorithm for solving such problems and gives examples which show the expected benefits and advantages of the approach as well as provides recommendations for its real-life applications.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):42-50
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AUTONOMOUS INTERMEDIARY PROCESSING OF BIG DATA FOR INTERNET OF THINGS
Ivaschenko A.V., Minaev A.A., Dvoinina O.V., Ledneva S.Y.
Abstract
In this paper there is proposed a concept for autonomous diagnostics devices balancing in a distributed system for Big Data processing, developed according to the principles of Internet of Things. Specialized software for data collection devices is considered that implements both direct appropriation and data transmission between the external devices. In the capacity of problem definition there is proposed to provide measurement events’ scheduling (the schedule should be actualized and adaptively updated according to the current situation changes in real time) with optimization of measurements’ number that characterizes the network load. To solve this problem there is proposed software architecture of data collection and processing distributed network that implements autonomous intermediary functioning of diagnostic devices. As an example there is described a hardware and software complex for a distributed system of medical diagnostics based of a network of autonomous sensors. Successful implementation of this solution in autonomous system for optical control over the intravenous infusion, as well as the results of its practical use confirms the benefit of described results.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):51-57
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METHOD FORCOMMUNICATION SESSIONSBETWEEN CONTROL TOWER AND SWARM OF SPACECRAFTSADAPTIVE SCHEDULINGBY COMMUNICATION RELIABILITY AND EFFICIENCY CRITERIA
Kalashnikov D.A., Solovyov V.A., Skobelev P.O., Simonova E.V., Mayorov I.V., Lakhin O.I., Tichonov D.I., Voroszheykin V.N.
Abstract
Methodfor communication sessionsbetween control tower and swarm of spacecraftsadaptiveschedulingby communication reliability and efficiency criteria is considered in this paper. Unliketheexpertapproach, this method allows to build a flexible self-organized schedule of a swarm of transceivingspacecrafts based on the multi-agent technologies. This method allows to solve situational conflicts and search for compromise between the participants, considering flexibly changing criteria weights. A mathematical model that allows to implement the compensation method for separate command-measuring complex (SKMC) network is developed. Also,ageneral scheme of communication sessions schedule in the network of SKMC technical devices with swarm of spacecrafts is suggested.Multi-agentexperimentalsystemarchitectureis suggested and its basic components for the implementation and experimental research of the developed method are defined.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):58-70
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DEVELOPMENT OF ISOLATION PROCESS CONTROL SYSTEM OF COMMUNICATION CABLES, TO ENSURE ACHIEVEMENT OF THE REQUIRED QUALITY OF PRODUCT
Mitroshin V.N., Kuleshova D.I.
Abstract
A methodology for communication cables insulation process control systems is presented. It ensures achieving the desired quality of the product, taking into account the operational frequency bands of the signal transmitted through the cable. The structure of the control system designed and its parameters are determined on the basis of the preliminary survey analysis of the automated process. The power spectral density analysis of the analyzed process leads to the conclusion that there is a controlled values harmonic-irregularities having a frequency determined by the extruder screw rotational speed. The structure of a double-circuit control system of applying cable insulation which considerably improves the insulation process indices is proposed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):71-77
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USING THE PRINCIPAL COMPONENT ANALYSIS FOR SIGNAL PROCESSING IN THE MULTIDETECTOR IMS CHROMATOGRAPHY
Saifullin R.T., Aleksandrov S.S.
Abstract
The process of signal formation in a multichannel chromatographic system is treated. The number of channels is determined either by the number of detectors (gas chromatography) or by the number of wavelengths of spectrometric detector signal (liquid chromatography). The algorithm of multi-channel signals processing using the principal-component method consists of the following stages: registrating chromatographic detector output (multi-channel chromatograms)t; forming a matrix of samples; obtaining the parameters from the matrix samples on the basis of the pair-correlation coefficients analysis and calculation, comparing the parameters, decision- making.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):78-84
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ASSESSMENT OF RATED POWER LOSS IN SUPPLY MAINS OF INDUSTRIAL PLANTS
Averyanova K.S., Bezmenova N.V., Golubeva N.D., Myakishev V.M., Tanaev A.K.
Abstract
Analytical expressions for the recovery of the coefficients of the original random graphs electric load generated by special industrial installations, from the known values of the coefficients of the electrical load step graphs are obtained by averaging the original schedule at intervals of theta. Expressions take into account not only the information about the random nature of the changes ordinate schedules electrical load, but also allow to quantify the calculated values of technical losses of electricity in industrial electric networks. Shows errors between the estimated and actual losses of electricity resulting from the loss of information about the real nature of the random changes ordinate schedules electrical load is uneven at intervals estimated theta original form factor.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):85-91
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THE SOLUTION OF FIELD PROBLEMS AT DESIGNING INDUCTOR WITH A MAGNETIC CIRCUIT
Bazarov A.A., Danilushkin A.I., Pimenov D.N.
Abstract
A set of issues on simulating electromagnetic and thermal processes in a closed magnetic circuit induction heater is discussed. The specific features of induction heaters with a lining ensuring thermal protection of the winding and decrease in thermal losses decrease, are reflected in a positive allowance increase between the inductor and the heated body. It results in magnetic-flux short circuits directly among the teeth, which affects inductor power characteristics. To determine the most favourable ratios between the groove and tooth sizes, the groove and the positive allowance between the inductor and the heated body, research is being carried out, and dependences are being constructed. A separate issue is determining the heated body placement depth. This parameter influences not only the specific power distribution along the workpiece, but also the heating accuracy achieved under the process time limit. The geometrical complexity of the design and the presence of nonlinear dependences in the distribution of electromagnetic and thermal fields makes three-dimensional numerical models the basic tools. In solving some of the problems two-dimensional array is used.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):92-101
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THE EFFICIENCY OF HEATING SYSTEMS CHP
Branfilova A.N., Stefanuk E.V., Kolesnikov S.V., Skvortsova M.P.
Abstract
The results of research into the hydraulic regimes of the Samara HPP heat network, done to increase the efficiency of its operating. A set of measures to provide the desired thermal outlets pressure is developed. And, in particular, the effectiveness of reducing the number of parallelly working pumps, while providing a specified flow rate and outlet pressure within the operating ranges of consumption, according to the characteristics of the pumps is demonstrated. The effectiveness of the replacement of the pump outlet pressure controlling by restarting or throttling by controlling by means of changing the number of the drive motor revolutions is also shown. As an example, applying a computer simulation of the Samara HPP heat network, a power savings curve is constructed when using a single variable-frequency drive pump in a group of five parallelly working SE - 250 - 130 pumps.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):102-107
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ON IMPROVING THE WORK OF ELECTROSUPPLY SYSTEMS WITH OWN GENERATION WHEN USED IN THE DISTANCE DETECTORS OF RELAY PROTECTION ONE-PHASE TRANSFORMERS WITH ROTATING MAGNETIC FIELD
Zakharov G.A.
Abstract
The problems of improving the operation of electrotechnical complexes (ETC) for power supply systems of electricity prosumers’ industrial enterprises with their own generation are discussed , and solutions using an innovative approach to the implementation of distance relay protection are offered. The issues concerning the inefficiency of the overcurrent protection for the lines exiting bus 6 (10) kV busses, as well as the disadvantages and the specific features of the use of the well-known ways to implement distance relay protection are treated. According to the results of the calculations for some plants and, in particular, in this paper for a certain typical enterprise, the levels of short circuit currents in the calculated points of the prosumer’s power station main connections circuit are analyzed. This allows, for industrial enterprises ETCs, to state the need to propose a way of improving the relay protection distance detectors based on the use of one-phase rotating magnetic field transformers. The experimental dependences are presented, reflecting the operation of these devices and characterizing the efficiency of their application in the relay protection of the ETCs in question.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):108-115
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MATHEMATICAL MODEL OF THE PROCESS OF HEATING ELECTRICAL EQUIPMENT COMPARTMENT OF A FLOOR VEHICLE FOR CONTROL OF ITS DRIVE PERFORMANCE
Kotenev V.I., Kotenev A.V.
Abstract
The model is constructed on the basis of the equation of non-stationary heat conductivity of a sphere equivalent to basic the electric-equipment heat dissipating elements in its heatmass characteristics, the heat exchange equation between the air in the compartment, the sphere surface and the compartment internal surface, and also on the basis of the equation of the thermal balance between the compartment external surface and atmospheric air. The heat conduction equation of the sphere is approximated by an ordinary differential equation of the second order by the method of integrated elements To determine the limits of Biot numbers, which require the clarification of the method of integral elements, a graph of the relative values ​​of the deviations from the exact approximate solutions is constructed for different Biot numbers and different values of the exponent of the coordinate function. A block diagram of the electrical equipment compartment as the control object is developed, which is designed to build a temperature limiter in the compartment by controlling the floor vehicle drive performance.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):116-122
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INCREASING OF POWER AND ECONOMICAL. EFFICIENCY FOR A HEAT AND ELECTRICITY PLANT WITH THE OPEN DISTRICT HEATING SYSTEM
Livshits M.Y., Sheludko L.P.
Abstract
The causes of decreasing energy efficiency and marketability of open-district heating-system heating and power plants (HPP) have been analyzed. The conversion to the closed-district heating systems is planned but it will reduce cogeneration electricity production by heat consumption, which is the main index of the thermodynamical efficiency of HPPs. The application practicability of a new approach to low cost modernization of open-district system HPPs is discussed. It includes heating and recirculation of the whole flow of feeding water in the condenser of one of the turbines. Approximation dependence based on the experimental data is used for computational analysis of thermodynamical efficiency of the suggested approach. The experimental investigations have been conducted for a number of low-pressure steam turbines of different types. It is shown that during the whole year operation period, ST-65-130/13 turbine power can be increased by 7-15 MVt depending on the operational mode of the HPP.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):123-130
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CONVECTIVE HEAT TRANSFER IN CYLINDRICAL BUND UNDULATION FURNACES
Makarov I.V., Shchelokov A.I.
Abstract
Convective heat transfer and it’s features in the bund undulation furnaces of steam boilers have an important task. The heat exchange surface in the form of tightly compressed helical coiled circular pipes is a special kind of a rough surface. Heat transfer between the flow of combustion products and the heating surface is classified as complex heat exchange, characterized by the simultaneous transfer of heat by radiation and convection. Used hydrodynamic analogy O. Reynolds for solving the problem of convective heat transfer. This method of approximate calculation of heat transfer in turbulent flow of coolant is not associated with the solution of differential equations, and is widely used for various application tasks. Results of authors experiment are consistent with the Nunner’s data.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):131-135
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GENERALIZED MODEL OF HETEROGENEOUS MULTICIRCUIT OVERHEAD POWER TRANSMISSION LINES FOR STEADY STATES CALCULATION
Shishkov E.M., Shishkova L.I.
Abstract
The paper proposes a generalized model of a structurally heterogeneous multicircuit overhead power transmission line. Possible types of heterogeneities in the structure of the line are discussed. A method for taking account of heterogeneities in practical steady states mode calculations is proposed. It is suggested that the line should be divided artificially to homogeneous sections with additional nodes. A method for forming single-line equivalent circuits on the basis of schemes in phase coordinates is proposed. Expressions for calculating the equivalent-circuit parameters are given. The possibility of using the designed equivalent circuits for solving the problem of the loss division between the circuits of a multicircuit overhead line is discussed. On the basis of the line state equation, expressions for the calculation of the active power losses in each circuit and the losses in ground wires are derived.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):136-141
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PINCH OF EFFICIENCY OF MACHINING OF MATERIALS FLOW OF HIGH-SPEED DISCRETE CORPUSCLES
Aleksentseva S.E.
Abstract
Circuit diagrammes of machining of materials now in use by a flow of the high-speed magnetic character corpuscles accelerated by energy of explosion of a charge, and implementing effect super-deep permeatings are explored. Efficiency of explosive plans of a throwing of particle fluxes on the basis of a cumulative effect and an end throwing from the point of view of minimisation of account mass of a magnetic character hinge fitting, uniformity of a flow and the square of single-valued machining is shown. The new circuit diagramme of machining of materials in a regime super-deep permeatings at the expense of a configuration of the lower back of a charge in the form of a globe calotte is developed, allowing to execute a throwing of corpuscles in the form of a dilated cone, increasing the square of machining and uniformity of fluence. The method allows to supply volumetric microalloying of metal preform and to increase strength properties.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):142-145
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DIFFERENTIATION OF FOUR-COMPONENT MUTUAL SYSTEM K, CA, BA // F, WO 4 BY USE OF INNOVATIVE TECHNOLOGIES
Katasonova E.A., Trunin A.S., Morgunova O.E., Surinsky K.D.
Abstract
Multicomponent systems are the foundation of up-to-date materials science. They enable creation of various combinations with a set of pre-set properties. The contemporary level of the society development demands the development of faster and more economical technologies for obtaining new materials. To do it, conducting research into phase equilibria physicochemical systems with minimum expense is necessary. Using innovative technologies, the differentiation of a K, Ca, Ba //F, WO4 fourfold mutual system is carried out. The tree of phases is constructed and correctness of its construction is proved by applying of the differential thermal analysis. The tree of phases has a cyclic configuration. 7 phase single blocks are revealed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):146-151
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THE COMPERATIVE ANALYLISIS OF SHAVING FORMING PROCESS DURING BT8 TITANIUM ALLOY SHAPING
Belov A.N.
Abstract
The results of the comparative investigations into cuttings forming during BT8 titanium alloy shaping by tools made of hard-facing alloys, niobium-carbide coated or not, are presented. It was established by the location experiments that the coating affects considerably the pace of cuttings, the thickness of a contact layer, the angle of a shift, the relative shift and the contact length with the front surface of a cutting tool. The investigations results show that the degree of adhesive and diffusive contact length interaction of a tool with cuttings is decreased.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):152-158
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Determining Natural bending frequency of a machine-tool spindle taking into account bearing anisotropic elasticity
Denisenko A.F., Yakimov M.V.
Abstract
The paper considers bending vibrations of machine-tool spindles, taking into account the compliance of the spindle body and bearings. The features of the development of dynamic models concerning the spindle shape as a shaft with portions slightly different in diameter, a significant difference in stiffness values of the front and rear bearings, and their radial stiffness anisotropy. For a stiffness hodograph in the form of an oval, analytical expressions for the natural frequencies of flexural vibrations are obtained. It is shown that the presence of the spindle bearing stiffness anisotropy results in a range of the spindle bending frequencies, which makes it difficult to conduct diagnostic activities. Taking as an example the design of a model 16B16T1 lathe spindle assembly, the factors affecting the formation of the given stiffness coefficients of the dynamical system are examined. The results of evaluating the influence of the spindle bearing elastic characteristics formed during the designing and assembly on changing the magnitude and range of the stiffness coefficients given.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):159-167
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THE ESTIMATION OF SURFACE HARDENING INFLUENCE ON THE ENDURANCE LIMIT OF CYLINDRICAL PARTS OF VARIOUS DIAMETERS UNDER STRESS CONCENTRATION CONDITIONS
Radchenko V.P., Lunin V.V., Kirpichev V.A.
Abstract
The influence of surface plastic hardening on the endurance limit of cylindrical parts of various diameters (10 - 50 mm) made of steel 20 with stress concentrators under bending is investigated experimentally. We consider the semicircular notches with radii of 0.3; 0.5 and 1 mm. The distribution of residual stresses in smooth specimens is determined experimentally by the rings and strips method. For the notched specimens it is determined numerically by calculation the sum of additional residual stresses due to the redistribution of residual loadings, after advancing hardening and residual stresses of smooth specimens. The distributions of axial residual stresses in smooth specimens and in the smallest cross section of specimens with concentrators are given. It was found that for predicting the endurance limit of the surface-hardened cylindrical parts under the stress concentration it is preferable to use the mean integral criterion of residual stresses. It is shown that after treatment of surface by microbeads and running roller in specimens with stress concentrators the endurance limit value increased by 30 ÷ 100% compared to the non hardened specimens. The experimental and calculated values of the endurance limits are given.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):168-177
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IMPROVING THE EFFICIENCY OF SEPARATION BY CONTROLLING THE DIFFERENTIAL DENSITY OF THE GAS / OIL MIXTURE
Zelenskiy V.A., Shchodro A.I.
Abstract
Increasing the productivity of developed oil fields is limited by the quality requirements of the product is obtained. The introduction of additional stages of separation requires high material costs and does not give the desired effect. Improving the efficiency of the oil and gas mixture separation is proposed by comparing the density of the liquid in the first and second chambers of the separator. To do it, additional pressure and temperature sensors are introduced into the automated control scheme of the three-phase horizontal separator. The measured parameters are compared with the readings of the other sensors and, given the characteristics of the separator, are translated into the fluid density. Given the difference in density between oil and water, the quality of the output product is determined. The separation process is characterized by a complex mathematical description, therefore, to evaluate the efficiency in the future, simulation methods are supposed to be used.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):178-184
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MODEL OF POTENTIAL DISTRIBUTION IN RESERVOIR WITHPROTECTOR
Konygin S.B., Konovalenko D.V., Kats N.G.
Abstract
The paper deals with the issues of reservoir cathodic protection. Electrical potential distribution in an experimental reservoir is investigated. It is established that electrical potential value decreases as the distance from the protector increases, and it keeps constant starting from a certain radius length. The equivalent circuit consisting of a voltage source and dividers is offered for theoretical description. Formulas for circuit components calculation are offered. Using the equivalent circuit, the theoretical potential distribution in the reservoir is determined. The comparison of the theoretical distribution with the experimental results confirms the model adequacy.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):185-188
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USING PREDICTION PHASE EQUILIBRIA IN THREE-COMPONENT SYSTEMS FOR OPTIMIZATION OF DEVELOPING NEW HEAT TRANSFER AND HEAT-RETAINING MATERIALS
Garkushin I.K., Shamitov A.A., Zhuravlev I.A., Kolyado A.V.
Abstract
To optimize the development of new heat transfer and heat storage materials proposed method of predicting the phase equilibria in three-component systems based on the theory of ideal solutions. For the validation of the method were chosen system of n-docosane - cyclododecane - n-tetradecane and n-tetradecane - n doсosane - tetrachloroethene. Experimentally selected systems were investigated projection-thermographic method using heat flow microcalorimeter. Recorded a satisfactory convergence of calculated and experimental data.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):189-193
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POSSIBLE APPROACHES TO DESIGN INDUCTORS
Eghiazaryan A.S.
Abstract
Approaches to the design of induction heating units (INU) are discussed. It is noted that the calculation of the inductor should be conducted within the parameters of the heated work piece and deforming equipment. This description of the electromagnetic field may be in three equivalent forms and names-but in the form of differential and integral equations and variation principles. A comparative analysis of analytical and numerical methods and methods of physical modeling was made. Stated that the advantage of the analytical solution consists in the possibility of applying a well-developed apparatus of an equivalent turbulent transformation. The possible aspects of the tasking Pro-designing and their influence on the final result of the project are considered. It is noted that many problems can be solved by creating a specialized CAD INU.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):194-197
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METHOD OF MEASUREMENT VISCOSITY OF THE MOTOR SPEED
Korganova O.G., Kuznetsov V.A.
Abstract
The method of measuring the viscosity of the speed of rotation of the motor. It is shown that this method is effective in measuring the viscosity of Newtonian fluids. The dependence of the speed of rotation of the motor shaft to viscosity. The structural scheme of the viscometer and a description of the main unit which is included in its composition. Methods for measuring the rotational speed of the motor shaft. It is shown that the study of the microcontroller for processing the measuring data is more efficient method of measuring the viscosity shaft speed DC motor.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):198-201
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SPECIAL FEATURES OF ALGORITHMIZATION FOR THERMAL FACILITIES MANAGEMENT WITHIN THE TIME LIMIT OF DWELLING IN THE HEATING ZONE
Mikheev A.G.
Abstract
The paper discusses the features of mathematical modeling of the process of heating the copper conductors in the implementation of the operation of the annealing process in general. Such operation is typical for the production of various types of cable. It is combined with the work of the various pieces of equipment in the general structure of automatic lines. With this combination, the residence time in the core wire is restricted heating. It is not possible to describe the process of heating the traditional mathematical models in the form of transfer functions. It is shown that for this type of heating mathematical model of this process will be reduced to a simple amplifying element with a variable gear ratio. To eliminate such parametric perturbations in the overall process of heating, a simple structure of the control algorithm.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):202-206
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DETERMINATION OF INJECTION COEFFICIENTS, ADJUSTABLE AND INSTALLATION SIZES OF AGG BURNERS
Petchnikov A.S.
Abstract
The article is dedicated to questions of gas burning efficiency rising in AGG-type burners. These burners are widely used in oil refining and chemical plants. An experimental research allows to determine primary air injection coefficients for mixing chambers of AGG 2, AGG-3 and AGG-4 burners. An optimal ratio of burner adjustable dimensions is determined. Maximal values of injection coefficient assure high explosions quality of air-gas mixture. It allows raising a burning stability and efficiency in case of gas rate variation and to simplify burner adjustment.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):207-210
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HEMICAL KINETICS IN BIOLOGY, MEDICINE AND AGRICULTURE. SOME EXAMPLES
Zaikov G.E., Pimerzin A.A.
Abstract
This paper has information about application of chemical kinetics for some problems in biology, medicine and agriculture. The article is included the information about cancer and antitumor preparations, radiation damage (Chernobyl nuclear power plant), gerontology (how we can live longer), stress, effect of superfine doses (plant growth regulators  pesticides and their efficiency), regulators of growth (pesticides) and toxicity of chemical compounds.
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):211-221
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NANOMATERIALS: THEORY AND PRACTICS
Zaikov G.E., Pimerzin A.A., Zimina L.A.
Abstract
Vestnik of Samara State Technical University. Technical Sciences Series. 2015;23(1):222-223
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