Vol 19, No 2 (2011)
- Year: 2011
- Articles: 40
- URL: https://journals.eco-vector.com/1991-8542/issue/view/1171
Articles
Scientific and educational integration of the universities under european programs of academic cooperation
Abstract
The article presents the main directions, forms and results of strategic cooperation between
the Institute of Electrotechnology of the Leibniz University of Hannover, Germany and Samara
State Technical University in the field of modeling and optimization of the electrotechnological
processes and educational activities. The organic relationship between the development of
joint scientific research and improvement and modernization of higher education at the present
stage of its reform in Russia is shown.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):6-14
6-14
Categorial modelling of transport infrastructure systems
Abstract
Methods of transport infrastructure modeling and categorical models forming are refered.
Problems of practical application of given methods for building information systems of transport
models are investigated.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):15-20
15-20
21-29
Petri net model of task scheduling for software project management
Abstract
In article a method of software project schedule performance modeling with Petri nets is offered.
Rules of passage from the network diagram or the Gantt Chart to Petri network model
are defined. Certain properties of O- dense Petri nets to estimate the structure of the task
schedule of the project are considered. It is offered to use stochastic Petri nets for program
project performance simulation modeling.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):30-36
30-36
Synthesis of optimal operation of the regulator in the automatic control of nonholonomic integrator
Abstract
The article discusses the method of solving the problem of optimal synthesis of controller's imperative
model as a system of rules «condition - action». A direct method of optimal synthesis
- Gauss pseudospectral method is considered. Examples of using this method for solving the
problem of optimal control system synthesis for nonlinear nonholonomic integrator are given.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):37-45
37-45
Method and algorithm of distribution of investments between regional enterprises, companies and firms
Abstract
The method and algorithm of distribution of investments between enterprises, companies, firms
located in a region of the country or in region area is considered. The region administration is
interested in money resources being available at its order and result in uncreasing of industrial
efficiency of region.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):46-51
46-51
Mathematical modeling and technological process management of optical fibre extraction
Abstract
The article refers to optical fibre extraction zone as a controlled object with on output of an
optical fibre with given diameter. The fibre diameter is controlled by varying furnace temperature
and extraction speed. The control system of extraction zone is desighed with consideration
of blank's diameter trend.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):52-57
52-57
Correction of transfer function of the inertial nonlinear sensor
Abstract
The problem of correction of transfer function of the inertial sensor having aperiodic transfer
function, and also corrections of nonlinearity of its monotonous characteristic are considered.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):58-64
58-64
Methods of measurement of integrated characteristics on the basis of storing and comparison of the instant values of periodic signals
Abstract
New methods of definition of the integrated characteristics, based on storing and comparison
of instant values of harmonious signals and providing reduction of time of measurement are
considered. Schemes of methodimplementing systems are given.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):65-70
65-70
Developing the training center car coordinates definition method based on video stream analysis
Abstract
For creation of the automated autodrome intended for carrying out training and delivery of the
first part of examination in practical driving, the information measuring system defining trajectories
of motor transport movement and making automatic charge of penal points is developed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):71-75
71-75
Continuous wavelet transform of analytic instruments signals
Abstract
Considered are features of wavelet transform and it's use for signal processing of analytic instruments.
For particular signals and wavelet-functions output of analytical calculation for
continuous wavelet transform is presented. Relations for numerical realization of wavelet
transform for computer signals are presented.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):76-82
76-82
Development of receipt of pyrotechnic gas-generator compositions for powder fire extinguishers
Abstract
Gas-generator compositions for gas-producer elements of powder fire extinguishers are developed.
Investigation results of selection and optimum relationship of initial components providing
maximum gas capacity and minimum pressure in gas chamber are shown. Gas-producer
elements on basis of such compounds are developed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):83-90
83-90
Production of nanoparticles for aerosol condensed phase
Abstract
The results of studies of the superdispersed aerosols production in the combustion mode of pyrotechnic
aerosol-generating compositions are shown. The principles of organization of combustion
mode providing for production and preservation of nanoscale condensed phase are
formulated.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):91-95
91-95
Influence of heat treatment on impact strength of chisel steel
Abstract
The analysis of influence of double hardening and false cementation, direction of a fibre and
the form of a cut of samples on impact strength chisel steels (0,19% C, 0,35-0,65% Cr, 0,6-
0,95% Mn, 0,35-0,75% Ni, 0,2-0,3% Mo) Open Society MZ «Izhstal» manufactures, Open Society
MZ «Electrostal», Open Society «OEMK», Open Society MZ «Krasnyi Oktyabr» is made.
It is established that implementing false cementation instead of double heat hardening can reduce
the values of impact strength - by 4-8 %, change of a longitudinal fibre on cross-section
- from 10 to 65 %, change of an U-shaped cut on V-shaped - from 16 to 50 %. It is recommended
for improvement of quality entrance control of finished сhisel steels to define impact
strength on samples of Sharpi with a longitudinal and cross-section arrangement of a fibre.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):96-101
96-101
Usage of ultrasonic vibrations of low amplitude for forming the forging compounds followed by analysis of resistance characteristics
Abstract
This paper presents the analysis of processes occurring while assembling with ultrasonic
small-amplitude oscillation superposition. Based on conducted experimebts the factors which
influence joint durability are defined.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):102-110
102-110
Research of the resource of supports cone bits
Abstract
The mathematical models for determining the resource of support cone bits are investigated
under different conditions and drilling modes are investigated . Based on the results of the research
a mathematical model for defining the resource supports, considering real conditions
and modes of drilling is offered.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):111-118
111-118
Design of machine unit actuator with isotropic coordinate priability
Abstract
The method of designing CNC machine unit actuator with identical progrestue motion axis
pliability is offered. The choice of isotropy condition implementation method is justified. Based
on analysis of lathe actuators design the technical and technological possibility of axis pliability
isotropy condition implementation is shown.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):119-125
119-125
Investigation of the relationship between acoustic emission and destruction stonecasting material under uniaxial compression
Abstract
The results of laboratory studies of acoustic emission under uniaxial compression samples
stonecasting based materials synthetic mineral fusion are presented. It is established that the
destruction of the samples is preceded by acoustic activity is caused by structural changes in
the material. Fracture is preceded by the accumulation of inter stresses in the material. The
character of acoustic emission and the load, which maintains the material depends on the
amount of amorphous component in its structure.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):126-132
126-132
Assessing the impact of assumptions on the results of the simulation of transients in lightning strikes in the transmission line
Abstract
The article presents an assessment of the influence of various simplifications and assumptions
in the physical model of transmission line in the modeling of the transition process of lightning
strike in the calculation of the number of lightning outages
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):133-138
133-138
Three-phase supplied industrial frequency magnetic fields calculation method
Abstract
The work shows analytical forms and graphic model of ouerall three-phase symmetric current
magnetic field strength change depending on distance between bus rods and control point of
possible devices locations.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):139-146
139-146
Simulation of automated machining systems
Abstract
The paper considers a method of modeling the technological process using a Markov chain,
technical characteristics of production systems. This method would allow submit the technological
process in the form of a causal link between its constituent elements and establish the
extent of their influence on the final result of the production system.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):147-151
147-151
Dependences of the torque, frequency of rotation and efficiency of induction clutch with three degrees of freedom from active length of an armature
Abstract
The paper refers to dependences of the torque on main shaft, and also frequencies of rotation
and efficiency of induction clutch with three degrees of freedom from active length of an armature
for loadings of various kinds are received at equal nominal frequency of rotation.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):152-159
152-159
Modeling of haydite swelling in rotating furnace as an control object
Abstract
The paper refers to the design of haydite production rotating furnace in the form of layer cylinder
as a control object with distributed parameters. Differential equations in cylindrical coordinates
for heat conductivity were used. As an example the furnace SM875B of a standard
size 2,5×40м was used for control object for solving the problem of automation of haydite
swelling process relatiue to control input and interference in the form of lumped parameters
structure/
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):160-168
160-168
A model of spatially distributed heat transfer between pipe and flow based on modal representation
Abstract
A dynamic model of heat transfer between pipe and flow of a heat exchanger taking into account
a spatial distribution of the process is proposed. A method for solving differential equations
in partial derivatives through expansion into an infinite series of eigenfunctions of the
one of equations is considered. For a fixed number of modes a numerical experiment is carried
out. The results are analyzed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):169-178
169-178
The boundary inverse heat conduction problems based on parametric optimization
Abstract
Boundary inverse thermal conductivity problem, formulated in the extremal form is solved.
Problem is considered as an optimal control process with distributed parameters under the restriction
of the set of control inputs to a class of continuous and continuously differentiable
functions. Using the parameterization of control actions, the problem is reduce to a nonsmooth
problem of mathematical programming. Solution is based on the special method that takes into
account alternance properties of desired extremals.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):179-185
179-185
Obtaining analytical solving of thermal conductivity problems with variable properties of physical environment
Abstract
Method of obtaining of analytical solution of heat conductivity problems based on using of additional
boundary terms received from basic differential equation of edge problem considered.
Using additional boundary conditions stipulated in boundary points leads to implementation
of initial differential equation inside the area. Implementation accuracy depends on the number
of additional boundary conditions (number of approximations).
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):186-192
186-192
193-199
200-205
Comparative analysis of communal objects heat supply efficiency
Abstract
The concept of energy efficiency and cost of heating systems is stated. The efficiency of communal
objects heat supply decentralization is proved. Comparison of investment appeal of
various centralized and decentralized heat supply projects is conducted.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):206-212
206-212
Modeling of vapor condensation processes using stochastic cellular automaton method
Abstract
Questions of application of a method of probability of the cellular automaton for modeling vapor
condensation processes are considered. The mathematical model of condensation processes
are described. Vapor pressure values are calculated by this model.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):213-217
213-217
218-222
Mathematical description of oil separation process under acoustic influence
Abstract
The researches of ultra sound influence on the process of oil separation have been carried out.
The mathematical model for description of oil blend separation by ultra sound influence has
been elaborated.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):223-229
223-229
Method of calculating the temperature separation of oil based on the properties of narrow fractions
Abstract
The article describes the problem of oil distillation to target products. The initial data tables
used are physical and chemical properties of narrow fractions. To solve this problem we used
the method of dynamic programming. The technique is implemented in software product.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):230-235
230-235
Theoretical foundations of existence and uniqueness of best approximation by spline-approximation
Abstract
The influence of the shape of the approximated curve to choose an approximation method for
solving the problem of automatic playback function with a given accuracy, uniqueness of solutions.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):236-239
236-239
Experimental research method of motion video detectors
Abstract
The experimental research method of driving overall video detectors performance created
based on methods of movement determination of a sequence of images with a fixed background
is offered. Research of movement video detectors consists of determination of space sensitivity,
contrast sensitivity, dynamic sensitivity and sensitivity to change of illuminance of a scene. Designing
a synthesized movie clip is taken as a base of research.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):240-243
240-243
Process operate trainer's learning subsystem
Abstract
The generalized structure of the process operator trainer and the computer-aided engineering
system is considered. The structure based on generic structure of automatic process control
systems is suggested. This structure provides flexible configuring of computer simulator.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):244-246
244-246
247-249
Structure and strength of welds of sheet products out of aluminum alloy 1545K
Abstract
The paper identified the mechanical characteristics and structure of welded joints of sheet
semifinished products from aluminum alloy 1545K performed automatic welding in inert
gases, dilution factors of welded joints of different states of the material.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):250-253
250-253
The results of calculations of lightning protection of 35-220 kV, supplying enterprises of oil and gas, with the help of traditional methods
Abstract
The article describes the specifics of the oil and gas industry, the main provisions of calculating
the number of lightning outages of lines 35-110 kV. Provides an overview of the results of
calculating the efficiency of traditional methods of lightning protection of overhead lines 35 -110 kV.
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):254-257
254-257
Application of the static compensators STATCOM forhousehold customers
Abstract
In the paper the results of the application of static reactive power compensators for the problems
of electric power quality improvement in the low-voltage systems for low-power and
household customers are described. The efficiency of the proposed solution is shown
Vestnik of Samara State Technical University. Technical Sciences Series. 2011;19(2):258-260
258-260