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Education "Bryansk State Technical University"
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A.A. Abramov, D.Eng., Prof., (Moscow)
V.I. Averchenkov, D.Eng., Prof., (Bryansk)
E.V. Ageev, D.Eng., Prof., (Kursk)
A.Yu. Albagachiev, D.Eng., Prof., (Moscow)
V.Yu. Antsev, D.Eng., Prof., (Tula)
A.P. Babichev, D.Eng., Prof., (Rostov-upon-Don)
V.F. Bezyazychny, D.Eng., Prof., (Rybinsk)
A. Bukhach, D.Eng., Prof., (Poland)
I. A. Buyanovsky, D.Eng., Prof., (Moscow)
L.G. Vainer, D.Eng., Assistant Prof., (Khabarovsk)
G.M. Volokhov, D.Eng., Prof., (Kolomna)
O.A. Gorlenko, D.Eng., Prof., (Bryansk)
S.V. Davydov, D.Eng., Prof., (Bryansk)
A. A. D’yakonov , D.Eng., Prof., (Chelyabinsk)
A.G. Ivakhnenko, D.Eng., Prof., (Kursk)
S.A. Klimenko, D.Eng., Prof., (Ukraine)
V.V.Kobishchanov, D.Eng., Prof., (Bryansk)
I.S. Konstantinov, D.Eng., Prof., (Belgorod)
A.S. Kosmodamianskiy, D.Eng., Prof., (Moscow)
K.V. Makarenko, D.Eng., Prof., (Bryansk)
B.Ya. Mokritsky, D.Eng., Prof., (Komsomolsk-upon Amur)
A. Pester, D.Eng., Prof., (Austria)
D.I. Petreshin, D.Eng., Prof., (Bryansk)
V.B. Protasiev, D.Eng., Prof., (Tula)
L.A. Savin, D.Eng., Prof., (Orel)
V.P. Smolentsev, D.Eng., Prof., (Voronezh)
D.L. Solovyov, D.Eng., Prof., (Murom)
Yu.S. Stepanov, D.Eng., Prof., (Orel)
A.G. Suslov, D.Eng., Prof., (Bryansk)
A.V. Khandozhko, D.Eng., Prof., (Bryansk)
M.L. Kheifits, D.Eng., Prof., (Belarus)
S.N. Khimukhin, D.Eng., Prof., (Khabarovsk )
A.S. Yanyushkin, D.Eng., Prof., (Bratsk)
A.V. Kirichek, D.Eng., Prof.
A.V. Morozova, Can.Sociol. Sc.
V.A. Tatarintsev, Can.Eng.
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The subscription index of catalogue
“Russia press” - 18945 semi-annual,
15621 – annual.
It is issued in February 2004.
6 numbers a year
Mechanical engineering and engineering science
R.N. Fomenko, M.V. Timofeev.
TECHNOLOGICAL CONDITIONS OPTIMIZATION FOR ALUMINUM ALLOY THIN-WALLED PARTS MACHINING TO DECREASE RESIDUAL DEFORMATIONS
Warping of thin-walled parts made of aluminum alloys complicates substantially an engineering process, increases a cost price and labour-intensity in manufacturing products, and in some cases it results in waste. In the paper there is offered an approach to the solution of the warping problem of aluminum alloy body parts through the introduction of optimum cutting modes at turning. Under optimum machining modes one implies those modes corresponding to the maximum cutter durability. There is developed an equation of machinability of blanks made of alloy D16T. The experimental data on the impact of machining mode parameters upon cutting forces, roughness of the surface machined and cold working are shown. Blank machining was carried out on a universal screw-cutting lathe NH 22. Cutting force components Pz, Ðó and Ðõ were recorded by universal dynamometer UDM-600, a cutting temperature was defined by a method of a natural blank-cutter thermocouple. Surface roughness was measured by device TR-200, surface microhardness was defined by automatic hardness gauge DuraScan 10. There are shown diagrams of tangential residual stress distribution after turning obtained in a computation way
Key words: warping, aluminum alloys, residual stresses, machining mode parameters
V.I. Kaplya, I.V. Savitsky, D.A. Mastikov.
MODEL OF MANIPULATOR GRAPPLE MOTION IN OPEN-ENDED PATH
APPROXIMATED WITH FOURIER TRUNCATED DIGITAL TRANSFORM
The approximation problem of the plane path of a manipulator grapple motion, where the path is specified as an open-ended contour is under consideration. The path is formalized as a vector in which the components are coordinates of the sequence of points defining a path form. Each coordinate is a complex number the real part of which corresponds to the coordinate x, and the imaginary part corresponds to the coordinate y.
In the work it is offered to supplement the path with the return that allows obtaining a closed circuit with the purpose of increasing approximation results quality. A coordinate vector is subjected to Fourier discrete transform. High-frequency harmonics of the image obtained are null and Fourier reverse truncated discrete transform is carried out. The coordinate vector obtained is an approximated smoothed path where a level of high-frequency spatial harmonics is decreased. A numerical simulation of a grapple motion along an approximated path is carried out. The results of numer-ical experiments have shown that the approximation accuracy through the method offered is considerably higher than that of the methods earlier developed. An assumption on time constancy of manipulator grapple motion between points specifying a path allowed carrying out the simulation of the process of velocity changes and acceleration in the course of the motion along an approximated path. The approximated path allows eliminating drastic velocity and acceleration changes during the grapple motion.
Key words: open-ended path, Fourier discrete transform, truncation of Fourier discrete transform, path approximation, manipulator motion planning, model of grapple motion
M.Yu. Kulikov, M.V. Yagodkin, V.E. Inozemtsev.
INVESTIGATION OF SOTS AND AMO IMPACT UPON THREAD-CUTTING
RELIABILITY IN ULTRA-SMALL HOLES
A thread-cutting process in ultra-small holes (d ≤ 1,4 ìì) is under analysis. It is shown that in the course of processing there is a high probability of cutter breakage which results in spoilage. The impact of hole design peculiarities upon tool breakage and the degree of its wear is defined.
The impact of viscous SOTS use delivered un-der high pressure upon reliability of thread-cutting in ultra-small blind and reach-through holes was studied. There was also carried out an investigation of the im-pact of anodic-machining use upon thread-cutting pro-cess in ultra-small holes.
The advantages and drawbacks of the methods used were revealed. A number of conclusions were drawn: SOTS application decreases insignificantly the breakage probability of the tool used; a viscous SOTS feed under high pressure does not allow increasing process reliability (at the expense of washout of chips formed at ultra-small holes processing) in comparison with a common SOTS feed; at cutting speed decrease by 30…50% the AMO application allows increasing stability in ultra-small threaded opening obtaining; the AMO application excludes very likely the effect of cutter jamming at the moment of reverse.
Key words: thread cutting, ultra-small diameter, process reliability, failure amount, SOTS, AMO thread-cutting
Metallurgy and materials science
Yu.M. Vernigorov, K.K. Leletko.
MAGNETOVIBRATED TECHNOLOGY OF MAGNETIC-HARD
MATERIAL POWDER DOSAGE
Packed density, fluctuation, compressibility and other physical technological properties of powders de-pend considerably upon interaction forces between particles. The efficient decrease of inner friction and, hence, fluctuation increase in powders of high-coercive materials was observed in high-gradient electro-magnetic fields in which it is also possible to carry out a rather efficient management of the outflow process of these powders. The dependence investigation of values characterizing a group behavior of particles upon phys-ical and mode factors it seems to be essential in con-nection with the computation and optimization of the parameters of fields ensuring a specified technological process.
The development of technological processes in powder metallurgy of ferromagnetic materials on the basis of a magnetovibrated layer is reduced not to the updating or improvement of operating methods and ways, but to the creation of new ones.
In this paper it is shown that a magnetovibrated layer ensures a suspension state of particles of a solid phase the dimension of which makes some fractions of micron and larger. At that it is essential that a destruc-tion of aggregations formed earlier takes place. No one of the well-known methods of vibration impact upon disperse ferro-magnetic material allows ensuring a spa-tial stability of particles of the dimension specified interval.
It is shown that the inner friction in a magne-tovibrated layer depends upon electromagnetic field parameters and at some optimum correlations of con-stant induction and an induction gradient of the mag-netic fields variable an apparent change of friction from dry into viscous occurs. The optimum parameters of an electromagnetic field are defined by physical technological peculiarities of powder material
Key words: magnetic powder, magnetovibrated layer, fluctuation, magnetic-hard ferro-magnetic
A.R. Luts, E.A. Amosov, A.D. Rybakov.
IMPACT OF ALUMINUM MELT TEMPERATURE UPON FORMATION OF TITANIUM CARBIDE DISPERSION PARTICLES AT REALIZATION OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS
The purpose of this work is a study of aluminum melt temperature impact upon formation of dispersion particles of the titanium carbide reinforcing phase in the course of the SHS reaction in the melt.
To achieve a purpose specified it was necessary to solve a number of problems, in particular: to investi-gate the impact of a mass part of the ceramic phase upon a system adiabatic temperature; to determine a recommended initial temperature of the melt for syn-thesis fulfillment; to calculate the most favorable tem-perature of synthesis for the formation of titanium carbide particles of ultra-dispersion dimensions.
Theoretical investigations were carried out with the use of THERMO program complexes. In the exper-imental investigations there was used a mixture of tita-nium powders (TPP-7) and carbon (P-701), a melt based on aluminum A7. Powders were mixed in stoi-chiometric relationships. The stock obtained was divid-ed into three parts and wrapped into foil in order to introduce into the melt. Charges were plunged in a suc-cessive way under the mirror of aluminum melt at the temperature of 900ºC and were kept up to the begin-ning of the SHS reaction after that they were poured out into an iron chill. A metallographic analysis was carried out with the aid of the raster electronic micro-scope Jeol JSM-6390A.
The results of the thermodynamic analysis of the impact of a melt initial temperature upon the sys-tem adiabatic temperature increase at the formation of a titanium carbide phase in the course of the realization of self-propagating high-temperature synthesis are shown.
It is revealed that an optimum temperature range for the formation of the ceramic phase with the ultra-dispersion size makes 700…900ºC
Key words: aluminum, self-propagating high-temperature synthesis, SHS, composite alloy, melt temperature
A.V. Zlobina, N.V. Bekrenev, K.R. Erofeeva.
INVESTIGATION OF MODIFICATION IMPACT OF COMPOSITES MICROSTRUCTURE IN SHF ELECTROMAGNETIC FIELD UPON THEIR THERMOPHYSICAL PROPERTIES
The investigation purpose consists in the study of temperature and thermal conduction of glass and carbon plastic and also heating kinetics and microstructure of materials mentioned through the methods of a scanning electronic microscopy with a quantitative assessment of its characteristics by means of a fractal analysis.
The SHF processing was carried out with the use of “Zhuk-2-02” horn plant with the radiation frequency of 2.45GHz and power 1.2 kW. To define thermal physi-cal characteristics of samples there was used Parker’s method in the version with a source of heat as a halogen lamp having power 1 kW. Thermal fields were recorded with the aid of a thermal imager FLIR E40. In the course of investigations it was defined that a factor of tempera-ture conductivity of lesser dense glass-fiber material is lower than that in hardened carbon nine times lower, and glass-fiber material thermal conductivity is lower for about 2.5 times in comparison with carbon plastic. Sam-ples subjected to the impact of the SHF electromagnetic field have a more uniform temperature: a difference for peripheral and central areas does not exceed 3-5ºC for carbon plastic and 8-10ºC for glass-fiber material. For test samples there is defined a difference up to 20ºC and higher. The effect obtained is explained with the increase of the amount of joints and points of the cohesion inter-action of fibers and a matrix and fibers between each other after the SHF electromagnetic field impact.
The increase of composite temperature- and ther-mal conductivity parameters after modification in SHF electromagnetic field allows ensuring the improvement of their functioning under conditions of temperature gra-dients and decreasing the intensity of an edge and surface heating that allows increasing the structure reliability in a speed aircraft
Key words: : reinforced composites, inter-layer interaction, heating kinetics, temperature conductivity, thermal conductivity, thermal field, microstructure, SHF electromagnetic field
D.Ya. Antipin, S.G. Shorokhov, O.I. Bondarenko.
ANALYSIS OF PASSENGER TRAIN EMERGENCY CRASH
The purpose of this work consists in the conse-quences analysis of a passenger train emergency colli-sion with an obstacle as a fright car on a railway track by means of the definition of dynamic efforts affecting a locomotive and passenger cars at a collision. To achieve the purpose specified through the methods of computer simulation with the aid of the formed collision computer models there is carried out a simulation technique of two scenarios of emergency conditions: a collision of a single locomotive with a fright car weighting 80 t with the speed within 10-36 km/m and pitched with 5 km/h and a collision of a passenger train having a locomotive and four passenger cars with a similar obstacle in the speed spectrum under consideration. As a consequence there are obtained values of maximum compression forces and accelerations affecting train units. The analysis of data obtained has shown that at a single locomotive collision with a fright car at a speed exceeding 15 km/h a carrying structure is affected by forces resulting in its damage and destruction. A passenger train collision with a fright car results in a hauling unit plastic deformation at a collision speed exceeding 15 km/h, and also in a damage of the passenger car following a locomotive at a collision speed exceeding 25 km/h, and a damage of a passenger car the second after the locomotive at a speed exceeding 35 km/h.
At that under conditions of the emergency col-lision under consideration the third and the fourth pas-senger cars do not obtain damages resulting in their destruction. Accelerations affecting hauling units (at crashes according to scenarios under consideration) do not exceed a normalized value. The results obtained may be used at the development of a passive safety system.
Key words: emergency collision, rolling-stock, obstacle, dynamic loading, inter-car joining
Informatics, computer engineering and management
L.A. Ponomaryova, A.B. Mosyagin, P.E. Golosov.
AUTOMATED SYSTEM FOR EDUCATIONAL ENVIRONMENT CONTROL
FOR COLLEGE RATING ASSESSMENT INCREASE
The updating of an automated system for educational environment control of the RANEandSS is offered. With the use of Petri net there is formed a simulator of a training process which allowed developing and realizing the algorithm of control and promising planning a training process as a module of the information-educational complex
Key words: rating, automated control system, information-educational environment, simulator, training process, Petri nets, information processes
G.A. Galchenko, A.A. Korotky, V.V. Ivanov.
INFORMATION-COMMUNICATION LOGISTIC SYSTEM FOR TRANSPORT ROUTES
OPTIMIZATION IN URBANIZATION ENVIRONMENT
The purpose of this work consists in transporta-tion process optimization under conditions of the formed transport infrastructure in cities. To solve this problem there are used mathematical methods and program complexes developed by the authors for freight transport optimization (by the example of a transport company for the delivery of collapsible freight containers developed by the authors).
In the work there are offered:
1) Description of a collapsible freight container (CFC),
2) Program complex optimizing a process of CFC delivery on demand of consumers in urbanization environment.
By the example of the transportation company “Pronto-RD” there is developed “Dispatcher – RD” computer program at the heart of its work is Svir method. At the choice of a cargo transportation route one takes into account the characteristics of traffic volume and crossroad loading. These parameters are calculated with the use of an electrodynamic method and a cellular automation one. Basic transport characteristics of all problem crossroads in Rostov-upon-Don are computed. The improvement of an information-logistic system of transport companies is an urgent current problem. The program developed may be obtained both by small transport companies and educational institutions for its use with student training purposes in the direction “Technology of Transport Processes”.
Key words: logistic system, optimization, freight transport, collaps-ible freight container
.S. Vasendina, A.T. Guriev.
PROCEDURE DEVELOPMENT FOR STRUCTURAL IDENTIFICATION
OF LANDSCAPE IMAGE OBJECTS OF ARCTIC AREAS
The paper reports the description of the devel-oped procedure for object structural identification of arctic landscapes. There is shown its comparison with already existing procedures.
In the preface one defines a concept of an arctic landscape, the significance and topicality of its investigation is described, in particular, with the aid of air photography of a region by means of a drone.
There is shown a review of existing procedures for object identification on area photos. A trend to the transition from manual image deciphering with the use of programs to the separation and object analysis at identification is revealed. The limitations in existing procedures connected with the use of only visual signs and separated from them at identification and also non-structured classification regulations are emphasized.
In the main part there is shown a description of the developed procedure for the structural pattern recognition of arctic areas supposing a successive ful-fillment of segmentation blocks, classification, a sense identification of object properties and that of the sepa-ration of relations between objects. The three last blocks because of the heterogeneity of areas obtained for identification use in algorithms an intelligent analy-sis of information under processing. They are com-bined into a single block, which is realized as an algo-rithm of the structural description of objects of arctic landscape images based on the interaction of special-ized intelligent systems. For information transfor-mation the intelligent systems use knowledge on a sub-ject area from a knowledge base. As a result of the algorithm work there is obtained an interrelated structural description of landscape objects.
In conclusion the distinctive features of the pro-cedure mentioned are shown such as a multichannel processing of image flow, the formation of the formal-ized term description of a subject area, the application of the identification regulations systematized in a knowledge base.
Key words: landscape, recognition of image objects, algorithm of structural description, systems of intelligent informa-tion analysis
A.V. Averchenkov, E.E. Averchenkova, D.I. Goncharov.
ADOPTION OF MANAGEMENT DECISIONS BASED ON MODELING
OF SOCIO-ECONOMIC DEVELOPMENT OF THE REGION
IN THE INFORMATION SYSTEM OF THE ADVISORY SYSTEM
An approach is proposed that determines the need to make an administrative decision based on the results of modeling the socio-economic development of Russian regions in the information-advising system being developed by the authors. A quantitative concept of the materiality threshold is introduced for the indicators of the forecast of the social and economic development of the region, an algorithm for its calculation is formed. The cases of exceeding the materiality threshold for some indicators of the forecast of social and economic development of the regions of the Russian Federation on the example of the Bryansk region are presented.
Key words: management decisions, threshold of materiality, modeling, social and economic development of the region, information advisory system
T.V. Karlova, A.V. Rastorguev.
ASSESSMENT OF EFFICIENCY OF COMPANY INFORMATION-ANALYTICAL SYSTEM
The work purpose is a procedure development for the assessment of efficiency and quality of a com-pany information-analytical system for the further improvement.
The assessment of information systems is not simple, but a significant problem for system improve-ment. There is no a universal method for the assess-ment of such systems that is connected with a multi-tude of system characteristics and, in the first place, qualitative ones, which yield hard to formalization and assessment. In this connection it is offered to use sim-ultaneously a number of methods: methods of docu-ments analysis, a comparative and system analysis, methods of expert assessments and a mathematical statistics.
A method for the efficiency assessment of in-formation-analytical systems for production manage-ment is developed. It consists in a successive collection of statistic and analytical information, in the reveal of correlation ties of parameters obtained at the stage of the analysis and their interpretation in an information way. One uses a method of pair comparisons, the for-mation of matrix diagrams of “L” types and a “roof”. The method allows assessing a system state using sim-ple and low-cost instruments and offering a set of measures substantiated objectively for information system efficiency increase.
The method developed is universal. Its realiza-tion gives substantial information results and the appli-cation may be of use in the assessment of not only information-analytical systems, but other information and management systems
Key words: : information-analytical system, efficiency assessment, management decisions, collection and processing of information, management
D.S. Mishin, V.T. Eryomenko, M.Yu. Rytov.
SIMULATORS AND METHODS TO SOLVE PROBLEMS OF RELIABILITY OP-TIMIZATION OF SYSTEMS WITH COMPLEX STRUCTURE
In the solution of management problems of or-ganization-technical systems a substantial role is played by monitoring realization and an obligatory analysis of a current state. The efficiency of the ful-fillment of similar problems makes demands to setting a problem of reliability optimization. Having a com-plex structure non-sequential systems are widespread in use. In cases of high indices of separate system fail-ures they become unacceptable for practical use. This paper reports the order of the formulation of problems on reliability optimization and a way for the realization of defining optimum ways in the course of system reli-ability optimization with some limitations. The offered option for system reliability optimization has a high computation complexity, but also allows defining op-timum ways of resource costs keeping at the same time the values required
Key words: reliability optimization, social-economic systems, analysis procedures, complex structure with some limitations
COMPETENCE FORMATION IN COLLEGE STUDENTS ON BASIS
OF VALUE-SENSE METHODS
There is an urgent necessity in the introduction in colleges training methods based on the system of value-sense principles affecting the formation of essen-tial competences in college students. To obtain highly experienced staff being of use in the society and the state it is necessary that students should have an assis-tance in the formation of personal qualities responding to high moral, responsibility, purposefulness, ability to work in a team, to a leadership, self-perfection, to the development of professionalism in the field of training at the educational level with the aid of universal com-petences.
In this paper there is revealed an influence of the system of value-sense principles upon development of universal competences and their interaction with general professional ones. Their models are presented. The universal system of the formation of college grad-uate’s essential competences is shown.
The significance of this investigation consists in that value-sense methods allow not only accelerating the process of the formation of universal competences which are necessary for the further efficient profes-sional student’s training, but have a positive influence upon development of their personal and professional properties.
The investigation carried out allows forming a new concept of student’s own development during his training under conditions of the technosphere changing dynamically.
Key words: competence formation, universal competences, professional competences, value-sense methods, bachelor’s degree, specialty, training efficiency