×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Simulation of a five-channel inverter with scalar control the motor speed by means of MATLAB / Simulink

    The article describes the results of simulation of a five-channel inverter with scalar control the motor speed. Briefly describes the principles of a scalar control, the structure of the five-channel inverter, as well as five-channel method of controlling the inverter using the method of double-zero sequence voltage (DZV). The structure of the model and the simulation results, confirming the possibility of using a five-channel inverter with scalar control the motor speed is considered.

    Keywords: motor, speed control, scalar control, five-channel inverter, Simulink

  • Implementation of the control unit stepper motor rotate camera robotic mobile platform

    This article describes the features of the implementation of the control unit stepper motor rotate camera mobile robotic platform using domestic components. Structure of a vector controller for a stepper motor analyzed. Selection of the control of the microcontroller for stepper motor control system is produced. The block diagram of the control unit stepper motor was developed.

    Keywords: mobile robotic platform, stepper motor, motor control, vector control, industrial electronics

  • Mathematical modeling of an interaction of surface waves in open anisotropic gradient waveguides

    We presented theoretical studies which were related with a compositional system consisting of two regular anisotropic gradient planar structures in this article. The principal axes of tensors of the dielectric permittivity were coincided with axes of the Cartesian coordinate system when their components were generalized by the spatial distribution. We used a representation of a set of related fields for the surface waves by mixed spectrum of the regular symmetrical gradient anisotropic waveguides. We also used the system of coupled equations for the quasi-amplitude coefficients of the interacting modes, which was received in our previous work. Then we analyzed the effect of anisotropy, inhomogeneity in the transverse and longitudinal dependence of modal transformation. It was possible to trace the transformation of modes with maintaining of polarization and take into account the phase relations between the interacting modes and functions of changing of all material characteristics in connected structures and their dependence on parameters of the gradient components of the dielectric tensor in waveguide media. The possibility of effective control to the interaction between modes of the continuous spectrum due to changes in parameters and characteristics of compositional artificial medium was found out. A comparison of the losses in the casing and in the usual coupled system was done. The high reliability of all results was marked.

    Keywords: connected regular anisotropic gradient structures, surface waves, parameters of the gradient components in the tensor of the dielectric permittivity, losses of directed waves

  • Implementation and parameter identification of autonomous unmanned underwater vehicle type glider

    The article deals with the implementation and identification of parameters of autonomous unmanned underwater vehicle. The structure of the glider and its basic structural elements. The experimental study to identify the parameters of the glider.

    Keywords: glider, submersible, gear change buoyancy actuators, control system, microcontroller board, remote control.

  • System of automatization design the service platforms on column apparatuses in the oil industry

    The article presents the system of automatization design the service platforms on column apparatuses using posibilities Autodesk Inventor software and control program in Excel. This article describes the standard steps of the design process and automation. Presented parametric model sites which were used for their design and calculation. Made preparations for the calculation and calculation of a parametric model platform. As a result of the calculation was formed electronic database and the album of typal platforms. It was also proposed the concept of the new program.

    Keywords: three-dimensional modeling, parametric model, the mathematical model calculations, finite element analysis, automation system design, program management, paperless design

  • A possible approach to the representation of the domain structure in automatic abstracting

    The problem of representation of the structure of the domain, which could be used in automatic summarization is described in this paper. As a solution to this problem, the authors propose to use a denotat-based text analysis technique , developed by A.I. Novikov and his school (Institute of Linguistics). This technique was the basis of the proposed infological model that makes it possible to view the structure of a particular subject area, and ultimately the creation of a system of automatic summarization.

    Keywords: denotation, abstracting, understanding infological model, neural network, text comprehension, semantic clotting

  • Use of power stations on the basis of solid oxide fuel elements for increase of efficiency of functioning of electrotechnical complexes of the agricultural enterprises

    The question of increase of efficiency of functioning of electrotechnical complexes of the agricultural enterprises due to use of power stations on the basis of solid oxide fuel elements is considered. The system of generation turns on the modular electrochemical generator on solid oxide fuel elements. The system of accumulation consists of the capacitor store and batteries. It is developed system of interface makes the converter of distribution of currents with three raising DC/DC converters and algorithm of a control system for effective functioning at integration into the centralized power supply network.

    Keywords: electrotechnical complex of the agricultural enterprise, the power station on solid oxide fuel elements, the hybrid store of the electric power, the converter of distribution of currents, algorithm

  • Experimental Study of Denotative Model of Understanding in Applications of Automated Abstracting Systems

    The article deals with an experimental study of computer representation of the structure of the domain, which can be used in the automatic summarization. As a theoretical basis for the study psycholinguistic theory of AI Novikov was selected. The denotative text analysis technique which allows to explicate text's meaning in a graph structure was tested. The use of this technique allowed the authors to create a computational model for the automatic construction of graphs that reflect the contents of the natural text.

    Keywords: denotation, computing experiment, abstracting, understanding infological model, understanding of the text, meaning clotting

  • The method of distribution of the load factor of the synchronous generator within the segment grid

    In the article the question of the distribution of the load factor of a synchronous generator, which determines the percentage of the PTO on the particular consumer generator. When transporting the electricity consumers on several lines from different energy sources, there is a problem of rational distribution of power level that the consumer will take from each of the sources. This paper proposes a method of allocation, which aims to minimize power losses in power lines. Disabled distribution law SG load factor, which takes into account line losses and possible limitations on the level of generated power generators.

    Keywords: the load factor, synchronous generator, control system, smart grid, power distribution.

  • The Basic Algorithm of Adaptive Management of the Synchronous Generator with a Reference Model

    The article discusses the the problem of controlling a synchronous generator, namely, maintaining the stability of the control object in the conditions of occurrence of noise and disturbances in the regulatory process. The model of a synchronous generator is represented by a system of differential equations of Park-Gorev, where state variables are computed relative to synchronously rotating d, q-axis. Management of synchronous generator is proposed to organize on the basis of the position-path control using algorithms to adapt with the reference model. Basic control law directed on the stabilizing indicators the frequency generated by the current and the required power level, which is achieved by controlling the mechanical torque on the shaft of the turbine and the value of the excitation voltage of the synchronous generator. Modification of the classic adaptation algorithm using the reference model, allowing to minimize the error of the reference regulation and the model under investigation within the prescribed limits, produced by means of the introduction of additional variables controller adaptation in the model. Сarried out the mathematical modeling of control provided influence on the studied model of continuous nonlinear and unmeasured the disturbance. Simulation results confirm the high level accuracy of tracking and adaptation investigated model with respect to the reference, and the present value of the loop error depends on parameters performance of regulator.

    Keywords: position-path control, adaptation algorithms, reference model, synchronous generator

  • Hilbert curve as the scan order for digital image processing

    Research was conducted on applicability of Hilbert curve for traversing through points of image in tasks of digital image processing on GPGPU. Experiments were made in form of Gaussian filtration for cases of raster and proposed traversing orders. Gaussian filter was implemented as OpenCL kernel for 8-bit grayscale images. GPUs with discrete and shared memory were considered. Analysis was made on how traverse order influences on accesses to GPU’s global memory and cache hit rate.

    Keywords: Hilbert curve, memory access pattern, OpenCL

  • Intelligent technique for faults prediction on hump yards

    Nowadays the wide integration of automation resources is occurred in many domains of industry. One of the key aspects of this process is control automation for breaking up process on railways. Due to the fact that main element of railway yard is hump the Intellectualization of decision making processes becomes the key task in area of fault prediction during breaking up. The experience of fault effects elimination shows this task decision allows to reduce the financial and time costs for breaking up process. This paper proposes new algorithm for creation of theoretical base of the system for fault prediction. This algorithm is realized by hybrid methods, which combine different temporal models characterizing technological process of sorting of following cuts. Presented experimental arguments show integration of proposed methods is efficient in domain of railway nreaking up process

    Keywords: breaking up process, hump yards automation, intellectualization of technological processes, fault detection, hybrid techniques, fuzzy temporal relations, reconstructed phase space

  • Generation of pores in films based on Na-КМЦ polymer with ti-powder including addiction of boehmitу nanoparticles

    Possibility of generation of porous films with filling of Na-КМЦ polymer with ti powder and boehmite nanoparticles was shown, the temperature of thermal decomposition of developed material was defined: 325° C . It was established that homogeneous pores were formed in films when Shannon entropy achieved the lowest value and chemical composition of composite materials didn't change in curing.The correlation between Shannon entropy and generating of homogeneous cells with radius above 125 micrometers was explored.

    Keywords: sodium-carboxymethylcellulose, titan powder, nanoparticles, boehmite

  • Interaction regularities of elements of production workers professional-qualifying staff forming system at transport-technological cars repair

    As a result of the conducted research, the structure of production workers professional-qualifying staff forming system at cars repair was identified. Interaction regularities of the system elements were determined. The obtained results allow creating an imitating model for production workers professional-qualifying staff optimization. That model lets disclose regularities of various factors’ influence on production workers professional-qualifying staff of maintenance and repair areas of transport enterprises. The imitating model was created as a computer software. The practical use of the obtained results helps decrease the expenses on staff training and loss caused by insufficient qualification of repair workers.

    Keywords: production workers staff, transport enterprises, production workers’ qualification, transport-technological cars, modelling

  • An iterative method for solving a system of linear equations using wavelet filters

    The purpose and objectives of this work are the improvement of the quality of the iterative solution of systems of linear equations(SLAE). To achieve this in the method associated with multi-level wavelet decomposition of the vector of residuals. Calculations in Matlab mathematical package, has confirmed the adequacy of the proposed method and its capabilities in solving systems of linear algebraic equations.

    Keywords: the system of linear equations, wavelet transform, wavelet filter, preconditioning algorithm, algorithm, relative error, vector-function, packet decomposition, the norm of the vector, the condition number

  • Application of methods of genetic algorithms for creation of a great number of Pareto in problems of multicriteria optimization

    Article is devoted to consideration of methods of multicriteria optimization across Pareto. The methods using an optimality across Pareto on the basis of genetic algorithms are considered. The description of advantages of the SPEA and SPEA2 method in relation to other the most often applied VEGA, FFGA, NSGA methods is submitted, and also the comparative analysis of the SPEA and SPEA2 methods among themselves is given.

    Keywords: problem of multicriteria optimization, Pareto's great number, genetic algorithm, VEGA, FFGA, NSGA, SPEA

  • Testing program for calculating transient thermal design mode

    We consider testing program finite element calculation of non-stationary thermal mode design of complex shape. We compare the results of calculation of temperature fields of design data real test. Determine the accuracy of the modeling of thermal processes in the body structure. Objective: To compare the results of thermal calculation of composite design data real test. To determine the accuracy of the finding of the program created by the temperature calculation. The design takes physical tests on heating external convective heat flux. The temperature value at the control points in the heating process is continuously recorded with a thermocouple. The results of measurements and calculations are compared. As a result of comparison, the conclusion about the accuracy of calculation of the temperature field created by the design calculation program.

    Keywords: testing, finite element calculation, temperature field, construction, heating device, the calculation error, the accuracy of the simulation

  • Power supply parameters identification

    Method of identifying the parameters of industrial electric power supply network by multiple linear regression is offered. It allows to determine power supply external characteristic on the basis of the values of voltage and current in the load node. This approach allows to form a control signal to the device dynamic compensation voltage distortion in real time.

    Keywords: Equivalent circuit, voltage regulation, multiple linear regression

  • The potential and the efficiency of mass media as the instrument of the management of public opinion

    The results of theoretical analysis of literary data about the media-centrism and the socio-centrism as approaches to consideration of opportunities of mass media as the instrument of public opinion management are presented in the first part of this article . The substantiality of the media centrists approach is explained. The insufficiently proved aspects of the socio-centrism are revealed. Conclusions of the theoretical analysis are given as argument of relevance of empirical research. Studying of efficiency of the Russian mass media as a factor of public opinion formation became the purpose of empirical research. Its results are considered in the second part of this publication. The collecting of the source data was carried out by the method of sociological poll. The respondents were interrogated about the rather preferred mass media, news telecasts, and also their representations about the more discussable events. The comparative analysis revealed the considerable similarity between positions of public opinion and character of the information patterns broadcast by the preferred TV channels.

    Keywords: media-centrism, socio-centrism, public opinion management, linear model of mass communication, step model of mass communication, "leaders of opinions", selective perception

  • On calculating the minimal dictionary size for speech recognition systems used in call centers

    The necessity for speech recognition use in call center works is briefly descrived. The currect situation of Russion-speaking systems is presented. The automatic speech recognition system with the possibility of speech dictionary size modification is announced. Effects on speech dictionary size are discovered. The value of the required speech dictionary size of the Russian language for a particular domain is confirmed.

    Keywords: speech recognition, call-center, speech dictionary size, allolog, perplexity

  • Development And Research of Path Planning Subsystem for Underwater Vehicle Control System

    This paper provides solution for the task of plane movement of the underwater vehicle using hierarchical control system. Searching A*-algorithm is used for creation of the path plan. Vehicle moves along the stated path under control of position-path regulator on the base of square form. Vehicle, used in this paper features torpedo-like form, two cruise engines and maneuvering device.

    Keywords: mathematical model, underwater vehicle, planning, position-path control, A*-algorithm

  • To the mathematical theory of surface waves in open compositional nonlinear anisotropic and gradient structures

    Distribution of surface waves in open nonlinear anisotropic and gradient planar compositional structures was considered. The planar waveguide structure consisted of four layers which dielectric susceptibility of the internal environment contained additive components. One of the components was depended on the module of electric field under sedate laws. Other components were represented by a tensor of dielectric permeability which main axes were coincided with axes of the Cartesian system of coordinates, then were turned on some corner of rather longitudinal coordinate of Oz, and finally were turned round the cross coordinate of Oy. Elements of a tensor of dielectric susceptibility depended on spatial coordinates under the generalized laws. From Maxwell's equations we received the wave equations for the cross working-out electric and magnetic vectors. New solutions of these quasi-differential equations which special cases could be presented by the set of known special functions were found. Cross and longitudinal components of electric and magnetic fields were found on this basis. In the end of our research we showed the possibility of practical applications of all results.

    Keywords: non-linearity, non-linear optics , layered structure , surface waves , discrete spectrum , dielectric waveguides complex structure .

  • Methods of processing and analysis of ion current signal

    The article presents the results of an analytical review of the major conventional approaches to processing and analysis of the ion current signal of contemporary domestic and foreign authors. Analysis of works made in terms of assessing the possibility of calculating the parameters of the combustion of the fuel-air mixture. It is shown that strong susceptibility of ion current to influence of intercyclic variations limits application of methods in practice, despite considerable theoretical opportunities of such methods.

    Keywords: ion current, internal combustion engine, burning, combustion chamber, fuel and air mixture

  • Social-psychological training as a method of optimization of social-psychological climate in group of staff of special divisions of power structures

    The article discusses the influence of socio-psychological climate office staff on success of professional activity of employees, their readiness to actions in extreme situations, on the stability of the personnel division. Based on the analysis of literature, we have highlighted aspects of studying socio-psychological climate, which allowed to develop a programme of training, aimed at optimizing the psychological atmosphere in the team. Analyzes the social-psychological climate of the team before and after training sessions. The results of the study allow us to consider socio-psychological training as a method of optimization of social-psychological climate in the team.

    Keywords: social-psychological climate, social-psychological training, unity, coordination, conflictness, relationship in collective, the relation to the management, satisfaction with professional activity

  • Analog and discrete-analog tunable integrators

    The purpose and problems of this work consist in research of schemes analog and the discrete and analog reconstructed integrators, feature of their construction and work, determination of uniqueness of each scheme, both on circuitry execution, and on a way of reorganization, carrying out the analysis. For the solution of a task the analysis of domestic and foreign works is made, schemes analog are constructed and the discrete and analog reconstructed integrators, work has survey character. During the comparative analysis, in article, it was revealed that depending on the specific solved objective, and also from technology of production, any of circuitry solutions of integrators can appear more effective in comparison with others.

    Keywords: the analog integrator; discrete-to-analog integrator; tunable integrator; restructuring numeric code restructuring changes in duty cycle; restructuring of frequency change impulses