The article considers discrete automatic machines with memory, designed for searching the values of parameters of the system optimizing a merit figure of the system, described by some criterion function. The problem of multiple parameter optimization is shown as a problem of discrete optimization by means of representation of values of parameters of the optimized system in the form of a set of discrete values with a specified step of digitization
In this article we present a study of current problems connected with the formation of a park of automobiles, tractors and aggregates for transportation of agricultural products and ways of
their solution
The article deals with the question of tillage with a turnover of reservoir devices for its implementation. We have also identified problems that exist in this process step. The ways of their solutions and their implementation have been proposed as well
The results of operating conditions of harvesting forest machines by means of optimization harvesting forest process with application of the queueing theory are considered
The developed mathematical model of the machine and tractor unit with the elastically damping mechanism in transmission of a tractor is given in the article. The analysis of mathematical model of the arable unit on the basis of a tractor with EDM in transmission showed that the MTU mathematical model can be considered as working
To study the formation of plunge basin in the
Cheboksary hydroplant, we used a scale model of the
spillway dam and all structures in the tailrace, installed
in the slot flume. When we passed the flow
corresponding to the diversion flow of the hydroplant
with a glance to the modeling scale, it was found that
the plunge basin was formed behind the end fixing of
the spillway apron. To research the dynamic facilities
of hydrosystem tailrace protection against erosion, we
used a small glass flume with a model of the roundcrested
weir. For the experiment, the water-surface
elevations were built in the flume without the weir,
and the uniform motion area was established. In
MathCAD software environment, the curve of the flow
of measuring rectangular weir of the flume was
created. Because of measurements, the curve of water
surface by the flow motion through the round-crested
weir was made. As the main criterion for modeling, the
criterion of Froude was selected. Scale of modeling of
flow parameters was determined. For testing, models
of hydrodynamic profile and sail structure with streamforming
sluice valves were built. The process of sand
washout from the flume bottom and formation of the
bottom ridges when installing the profile was
photographed. Impact of the profile on the flow and its
relation with the formation of the bottom topography
were studied. Full-scale values of geometric
parameters of the bottom ridges and their movement
velocity were established as well
The article describes the process of cooking wheat granules conducted under production conditions of cooking and enzymatic cooking in laboratory conditions. It gives the values of moisture diffusion coefficients and the results of modeling the process of cooking using the equation of non-stationary diffusion method of nets for the implicit scheme. The model takes into account the changes in the moisture concentration of particles in space and time, the temperature change process and avulsion of starch outer layers
The article is devoted to the problems of
increasing the economic growth of the Russian
Federation, the development of high-tech
knowledge-intensive manufacturing industries on
the basis of a fundamentally new technological
order, new unmanned technologies. The measures
to improve the accuracy of manufacturing of
complex and large-sized parts. Currently, the
technical level of many sectors of the economy is
largely determined by the level of production of
means of production. The basis of these means is
the machine tool industry. On the basis of machine
tool development we handle a comprehensive
mechanization and automation of production
processes in industry, construction, agriculture,
transport and other industries. We completed a
comprehensive analysis of the errors affecting the
manufacturing precision parts. The activities for
improving the accuracy of manufacture based on
VM 32 multi-machine complex series were
proposed. We made the analysis of the cutting
forces influence and the cross-sectional shape of
the slide on its deformation for various types of
processing. We determined the optimal shape of
the cross section of the slider to increase stiffness
and reduce deformation of the slide in metal
cutting
On the base of the smoothed particles hydrodynamics method, the mathematical model of plasma coating process on details surfaces in the mode of electrical parameters modulation is performed. This model al-lowed optimizing the plasma coating process parame-ters
The optimization of constructive parameters of chain brush cutter with chopping elements has been performed. The optimal rotating speed of chain reel, speed of brush cutter and clearance between chain reel and surface has been found