2014 Dynamics of Systems, Mechanisms and Machines (Dynamics)

The purpose of this work is to describe a hybrid approach for constructing intrusion detection systems that incorporates feature extraction algorithms and algorithms for tuning classifiers. In this paper, we construct the classification algorithm based on the invasive weed optimization algorithm and use the genetic algorithm (GA) to reduce the dimension of the feature space. The experimental resul... View full abstract»

Complex-exponential basis functions found a wide application in various fields of science and technology [1]. However, the basis of these functions has the disadvantages associated with its complex character. A worthy alternative to complex-exponential basis is Hartley basis, it takes only real values. This article focuses on the basis of spectral analysis in Hartley basis, Hartley transform and F... View full abstract»

The paper describes the simulating Helmholtz coils and improved Helmholtz coils in COMSOL. Improved Helmholtz coils allows to create a magnetic field with inhomogeneity is not more than 1 % at a distance of half the radius of the geometric center of the coils system. The simulation technique is described. View full abstract»

The paper analyzes oil refinery air pollution emissions. The most dangerous air pollution production facilities work which should be provided with continuous automated emission monitoring system (CEMS) is proposed that allows air pollution types sources monitoring. Mathematical models are proposed to operate CEMS that allows continuous refining air pollution calculating. View full abstract»

The article describes an approach to the creation of systems for electro-thermal heating of unit axle railway car. A construction of a mathematical model of the induction electrothermal apparatus for studying the distribution of the electromagnetic and thermal fields in the heating elements in various modes electro-thermal installations is developed serve as a basis for analysis and possible adjus... View full abstract»

In the present times a greater awareness is generated by the problems of harmonic voltages and currents produced by non-linear loads like the power electronic converters. The influence of voltage and current harmonics on equipment connected to electrical supply systems can cause serious problems. Customers need to be protected from other customers producing excessive distortion on the supply and d... View full abstract»

High levels of power consumption of mechanized oil production stimulates the engineers for searching new solutions to improve energy efficiency by adjusting the operating mode of submersible motors. Using numerical studies we explore two ways to adjusting the operating mode, i.e. switching the transformer taps and introducing additional inductive resistance in the stator circuit. The studies showe... View full abstract»

The methods of formation of surface layers by ion implantation and a vacuum ion-plasma method of deposition of coatings are considered in this investigation. The model of the processes occurring in materials under the influence of these types of irradiation is developed. The processes arising in the surface layers of the modified material are also considered. The conducted experimental and theoret... View full abstract»

Issues of design and construction concept of electrothermal microengines (ETME) for ammonia correcting propulsion systems (CPS) of maneuvering small spacecrafts (SS) using multi-purpose approach are considered. ETME structural designs are defined, results of experimental studies and ways of further improvement of ETME are presented. View full abstract»

The results of experimental examination of the strain (mechanical stresses) characteristics of different type optical fibers based on Brillouin backscattering spectrum analysis are presented. Also here are discussed temperature dependences of Brillouin backscattering spectrum changes of the optical fibers. The received results confirmed a possibility to detect problem (mechanical stressed) section... View full abstract»

The nodes of optomechanical allotment of survey-search and scan systems use precision electric drive providing preparatory installing of optical system of scanner in starting position. The purpose of this paper is to improve control system electric drive by means of indirect. methods of errors measurement on the angular speed and angular acceleration. As research methods of electric drive there ar... View full abstract»

Methods of flattering of the diamond wheels on the bakelite bonds, with the use of various truining tools for recovering of maintainability of the working area of the diamond wheel and the formation of the shaped section are considered in this work. The purpose is to define the optimum scheme of flattering of the shaped abrasive wheels and the construction of dressing devices which are inseparably... View full abstract»

In the article the principle of construction and the mathematical model of a low-frequent vibrated support in which in one form a rubber steel or a pneumatic dumper and hydraulic inertial motion convertor parallely installed on the basis of the rubber-cord shell filled with fluid have been considered. The hydraulic converter generates motion with different dampers ensures efficient vibration insul... View full abstract»

This paper describes the possibility of developing linear and angular displacement sensors with frequency output signal based on oscillator effect in n-type germanium. Its advantage is high sensitivity and wide temperature range. Oscillator sensor of angle displacement working on change the angle between electric and magnetic field has the sensitivity 1 kHz/°. Sensitivity of linear displacement se... View full abstract»

The article considers possible schemes of heat loss recuperation in mobile compressor power plants with the internal combustion engine drive and the assessment of their efficiency. Possible schemes and mathematical formulae describing the efficiency of the schemes under consideration are given; the numerical analysis of the quotation was carried out. It has shown that as a result of the implementa... View full abstract»

Electro-mechanical treatment as a method for improving the quality of machine parts is considered in the article. The advantages of the electromechanical processing are outlined, the analysis of electromechanical treatment is carried out. On the basis of analysis of heat generation in the surface layer during electromechanical treatment the dependence of the technological parameters electromechani... View full abstract»

Project development of precise electric drive of the optomechanical spinner refers to the field of line-by-line scanning process study. It is essential to minimize errors in phase and angular velocity quickly and accurately to avoid information loss in rotation velocity changing. There are various ways to control the implementation complying the requirements. Using the phase plane method the analy... View full abstract»

The effect of nanoparticles of titanium carbonitride on the structure and properties of heat-resistant nickel-based alloy was investigated. It is shown that in modifying transcrystallization zones are eliminated from cast metal, dendrites are dramatically reduced in size, morphology and topography of carbides and γ'-phase are improved, which causes the increase of heat resistance in metal and enha... View full abstract»

The article describes the calculation of one of the possible options for the certification of the electric field intensity meters. The main criterion for the device is the error, which should be within the standard electric field requirements issued by the official measurement chain for the electric field intensity measuring devices. One of the possible variants of spatial representations of the p... View full abstract»

The aim of the conducted work is the research of the temperature condition dynamics around the thermopile in winter and summer exploitation conditions for the climatic zone of the South-Western Siberia. The temperature fields around the thermopile were obtained by experiment. The calculated results were proved by experimental research. On the basis of the thermopile the sample for the perspective ... View full abstract»

The article describes the main disadvantages of the commonly used Pierce oscillator circuit. The results of the developing integrated differential crystal voltage controlled oscillator (VCO) for the reference frequency sources are represented. The optimization of the circuit is carried out in terms of phase noise, by applying p-MOS transistors in the circuit. The problem of adjustment the integrat... View full abstract»

Efficiency increasing of air condenser with the help of cooling air distribution is considered. The methodology of carrying out the engineering analysis of cooling equipment on the base of ANSYS CFX is developed. The calculation of tubular cooler characteristics with several alternatives of the inlet section is made, the results analysis is given. The improvement in cooler work using guide rails f... View full abstract»

The problem of forming of one-dimensional contours with of the desirable law of curvature and torsion values change along the contour is considered in this article. The technique is based on the formation of the curve for individual monotonous areas, with their subsequent docking. View full abstract»