According to its operating principles, generators of
aircraft electric power supply systems do not differ
from the similar generators of transporting and
stationary systems, but have range of peculiarities:
low weight and dimensions, high density of armature
current, compulsory cooling (air and liquid), high
frequency of rotor spinning. The article considers main
requirements, imposed to generators of flight vehicle
and the construction peculiarities and main physical
and operational characteristics of generators applied in
modern flight vehicles. It is suggested to use noncontact
electrical machines as sources of electrical
energy in the aircraft electric power supply systems:
synchronous generators with impulses from permanent
magnets and asynchronous generators with capacitive
impulse. To improve physical and operational
characteristics of generators and aircraft electric power
supply systems it is suggested to refuse from
permanent frequency spinning drivers which have low
converters as stabilizer of voltage and frequency
current of electrical energy source. The peculiarities of
its operation are considered, its advantages and
disadvantages. It is possible to improve characteristics
of aircraft electric power supply systems by means of
study of the electromagnetic compatibility of the main
functional system elements and by means of
application of non-contact electrical devices, applied in
the guard and control systems, made on the basis of
power and electronic devices
At the nodes of the various machines, we use plain bimetal bearings: a steel base - antifriction cladding layer. Bimetal bearings have increased performance. One of the ways of making such bearings is the way of centrifugal bimetallization with heating of the independent electric arc. An important requirement of this technology is a uniform heating of the workpiece along the entire length until the formation of a continuous layer of the molten cladding material. The process of bimetallization require temperature control, since within the movement of the electric arc, low heat or high heat are possible due to heat dissipation from the ends of the workpiece in the installation and from the outer surface of the workpiece to the environment. A viable option the temperature control of the heat process of bimetallization for industrial conditions is to control the temperature of the outer surface of the steel base. It is necessary to solve the heat problem of the relationship between the temperature on the surface of the workpiece with the temperature on the boundary layers. For this purpose the numerical solution of the mathematical model of the thermal process, which includes the heat transmitting equation of Fourier and heat transfer at the ends of the sleeve according to Newton's law. The equivalent coefficients of heat transfer are obtained based on calculated and experimental thermograms. This is a time-consuming work. To minimize the time of fixing the boundary value problem of the thermal process of bimetallization, in this work we present the preliminary modeling based on the analytical solution of the thermal task of bi-metallization
The article formulates and solves the task of discrete
control in the thermophilic stage of the composting
process. It is shown that considering the relay control
entity to maintain specified process conditions requires
the organization of the sliding mode. We have solved the
problem of minimizing the temperature deviation of the
substrate from the set values and the deviation of the
oxygen concentration in the gas phase of the bioreactor
from the specified values. The article shows the
algorithm to compute the discrete control of the
composting process in the thermophilic stage. This work
was prepared in the framework of the scientific project
16-48-230441 a(R) "Mathematical modeling of the
processes occurring in the automated installation for
year-round production of organic fertilizers in the
conditions of the Krasnodar region", financed by RFBR
and the administration of the Krasnodar region
The technique relates to the area of distribution of key
information in cryptographic communication systems.
The purpose of the work was to solve the problem of
increasing the speed of distribution of key information
for special bodies of federal bodies of critical facilities
in the conditions of network-centric management and
creating alternative options for the distribution of key
information when key documents are compromised to
special equipment. By applying the methodology, a
solution to this problem is achieved by applying a key
distribution method based on asymmetric
cryptography using symmetric polynomials
This article is dedicated to the study of the
parameters of the artificial immune system for
solving the polymorphic viruses’ detection
problem. The goal is to define a vector of the
immune system parameters that would ensure the
minimum number of errors of the first kind, the
minimum number of errors of the second kind and
the maximum percentage of polymorphic viruses’
detection. That is, the most accurate classification
of them as a malicious code, in relation to any
theoretically possible vector of parameters of the
artificial immune system. A distinctive feature of
the studied artificial immune system is the use of a
class of genetic algorithms that provide more
efficient training of detectors. The configurable
parameters of the system are: the algorithm for
determining the proximity of the detector and the
pathogen, which can be realized by determining the
Levenshtein distance or by the method of adjacent
bits; as well as the method of implementing the
crossing-over operator, the method of implementing
the mutation operator, the method of implementing
the selection operator, the algorithm for
determining the proximity of the detector lines. In
addition, the article considers the expediency of
using a distributed network of several nodes, each
of which will have an immune system that will
exchange data with other nodes of the network. As
a result of the research, a set of optimal parameters
was obtained in which the system achieves the
maximum accuracy of recognition of polymorphic
viruses
We have presented technical solutions of an energy
supplying complex of apiary based on a solar plant,
which ensure its functioning in the winter. Various
aspects of the influence of the snow cover on the
functioning of the complex are considered in the
article. The favorable effect of the snow cover includes
increasing the diffuse insolation, improving the
thermal insulation of the building for placement of
bees, which protects bee families from fluctuating
external temperature. The negative effect of the snow
cover includes adherence of snow to the receiving
surfaces of solar energy converters, which can lead to
decreasing the efficiency of using of photovoltaic
modules and solar collectors. Both active and passive
methods of combating snow sticking are suggested in
article. Passive methods include installation of solar
energy converters at an angle close to 90°, as well as
their placement on the windward side. The simulation
of the functioning of the complex based on a solar
plant was conducted for climatic conditions of the
Republic of Mari El (the time interval – from 14
October to 14 April, a photovoltaic module area – 1,3
m
2
with installation angles of 72˚ and 88˚). Because of
the simulation, we obtained graphs of the changing the
power of the photovoltaic module. Active methods
include air injection onto the receiving surfaces of
solar energy converters and using of heating elements
The article is devoted to finding of the optimum
parameters for elastically damping mechanism (EDM)
which is located in transmission of machine-tractor unit
(MTU). The investigated MTU is based on the tractor
of 1.4 class in plowing mode. EDM is designed for
MTU in order to make its’ start smoothly, to reduce the
dynamic load in transmission, to protect engine from
the external load vibration. The “transmittance level”
(index T) is used as evaluation of the protective
mechanism quality. The study was carried out by
means of the experiment planning method, viz. the
central composition plan of second order with five
factors. A regression model for response function
(“transmittance level”) is given. This model takes into
account the chosen EDM characteristics. The statistical
analysis methods (Student’s t-test, Fisher’s test) were
used to study the regression model. The dependence of
response function on each factor apart, their cross
impact on the process are described. The system of
partial differential equations is obtained to find the
optimal values of parameters and response function.
The optimal value of a “transmittance level” can be
obtained by varying different EDM parameter values.
Optimal values of parameters and as result - response
function - allow improving of MTU functioning in
plowing mode
Results of engineering and scientific search of
improvement of resource-saving machine technologies
of finishing and cleanup processing of cars details,
development of new camps and technologies are
presented. The possibility of low-frequency
fluctuations with big amplitude can be implemented
due to assembling flat or curvilinear elements on
external surfaces of the relative screw reel. The use of
computer modeling enabled us to obtain a relative
screw drum that provides not only giving movement to
loading masses with a big fluctuations amplitude, but
also compression of loading masses in the process of
their motion from loading to unloading. In such
machines increase in processing efficiency is reached
not only due to achievement of great movement
amplitudes values of the loading masses, but also at
the cost of compression of loading masses in
processing and intensity increase of their mixing. The
scheme of the machine for continuous processing with
mechanization of separation of details from working
environments particles is provided. Results of
researches of quality and surfaces micro hardness
change processed in the offered machines designs
show that details processing time makes 3-6 min
The article is devoted to the analysis of the use of
large data processing technology in information
systems of territorially distributed complexes
The problem of availability and quality of medical
care is a priority nowadays. The Medical Centres for
Information and Analysis (MCIA) have been created
in the regions for the purpose of gathering information
about the quality of services rendered and subsequent
data are transferred to the Ministry of Health Care of
Russia. Regional MCIA are complex and developed
systems that solve simultaneously many problems,
one of which – the organization of collection,
processing, recording and analysis of information on
the provision of medicines. It has been established in
the course of conducting an analytical review of
examination systems of preferential recipes and
information protection that the level of automation of
routine operations of the MCIA activity of the
Krasnodar Region is high, but there is no qualitative
information processing. As a result of the comparative
analysis it was determined that the automated review
of medical prescriptions for privileged drugs allows
identifying abnormalities in the reference data without
any analytical conclusions about the causes and
consequences of the case. Taking into account the fact
that in the provision of essential medications there still
exists quite understandable demand for software
products which automize the routine work of
specialists, it remains obvious that the directions of
improvement of software products are not
implemented fully. In this regard, the present research
proposes measures to improve the existing systems by
integrating with the information system of medical
and economic control of the prescription of medicines