The tillage with moldboard plows is one of the energy-intensive operations in farming. In view of this, the search of the energy saving solutions and tillage aggregates receives priority. The use of rotary tillage tools based on the working body-mover with elliptic blades, which horizontal soil reaction parts are directed to favoring grade of the aggregate, and, therefore, apart from the performing engineering perform the body-mover functions, - is one of the effective ways of the energy cost reduction. The authors offer the development of the rotary cultivators based on the working body-mover with elliptic blades. The change of their design values allows the development of various profiles tools. The use of these working bodies based on rotary cultivators will allow the energy cost reduction by the tillage process, especially in the compartments of terrain, as the use of tractors with moldboard plows for the main tillage is problematic. In many cases, these lots must be labored manually. The article describes the construction, generalizes the mechanical specifications and working modes of the rotary cultivator at the main tillage
In this article, an algorithm and a forecasting model for
a set of informative parameters are proposed. These
parameters describe the technical condition of power
plant engines with a possibility of estimating the
forecast error
Signals with the sinusoidal minimum (frequency)
shift-keying (SMSK) which impulse form depends on
parameter µ are considered. Expression for power
spectral density (PSD) of SMSK signals at various
values of parameter µ is obtained. Results of PSD calculations
and effective bandwidth of signals by various
criteria are presented
The article deals with urgent questions concerning activities of woodworking industries, which face tough economic situation. Nevertheless, these enterprises reveal a definite growth of output in some kinds of products, such as fuel pellets, window units, special timber assortments, etc. The problems about possible risks connected with equipment handling were identified, which has physical and intellectual wear, as most of it has been operating since 1980. On the basis of accomplished investigations of normative and technical sources the documents were specified, which establish safety regulations for operating equipment and requirements for risk assessment techniques. The necessity of their improvement is also determined. Taking into consideration peculiarities of management of woodworking production process, the analysis was carried out in order to estimate the factors, which influence the quality of mechanical treatment by the method of 5M. Following the observations and processing of statistical data it was established that equipment and personnel show the greatest impact on the quality of half-finished and final products. Risks evaluation method for woodworking industries is suggested with due account for equipment safety parameters, which includes determination of consequences, risk probability, risk level on scale factored “high”, “medium” and “low”. Much attention is paid to the items composed: rank matrix of two-factor model, with calculations of numerical values of risks, as product probability of occurrence and severity of consequences, and risk log. Three zones were appointed with the following risk levels: the first zone with weighting factor not less than 6, the second zone: 8-16, the third: 20-25. In course of investigation, it was detected that the highest risk factor, connected with equipment operation, is probability of mechanical injuries of hands and most possible – getting cuts. The flow chart of risks management during the woodworking production process is offered in accordance with all Union State Standard regulations R ISO 9001-2015 and GOST R ISO/MAC 31010-2011. The developed algorithm provides accomplishing performance of work on risks management in more available and short form with presentation of processing operations, actual doers, kinds of required normative documents and papers worked out within the enterprise
Currently, there are widely used combined (hybrid)
power systems in the world, made using renewable
and conventional sources of energy. The article
discusses a typical structural scheme of a combined
system of electricity supply; it also shows the design
and the characteristics of three types of structural
circuit design of combined power systems and their
main advantages and disadvantages. Peculiarities of
the choice and calculation of parameters of the basic
functional elements of the combined system have
been presented. This study describes main
characteristics of solar batteries and provides
analytical expressions for the calculation of their
main parameters. The main characteristics of
batteries and the peculiarities of calculation of the
capacity of storage batteries operating in autonomous
systems have been listed. The features of selection of
voltage inverters have shown that in addition to the
nominal input and output voltage it is necessary to
consider other characteristics that influence the work
of autonomous power supply systems. It has been
shown when it is desirable to use electromechanical
generators to supply autonomous consumers. The
types of structural solutions and the choice of the
basic functional elements of combined power
systems will increase the efficiency of their design
In the article questions of forecasting of publication
activity and a problem of planning of actions on
management of publicity activity of scientific
collective are considered
In this article, we have presented the study and
implementation of the physical model of
motion of two coupled pendulums with use of
numerical methods. When building the model
we were using the method of Euler solutions of
differential equations, which displays
pendulums visual motion, as well as building
graphics of functions of speed, angle and
acceleration depending on time with high
reliability. We have generated equation of
motion for generalized coordinates for the first
and second mathematical pendulum. The
generated application implements a physical
model of a double mathematical pendulum,
commit sustained oscillations with the ability
to change the basic parameters: deflection
angle, speed, mass and length of the rod in C++
language by programming environment
“Embarcadero RAD Studio”. This application
can be used as a model of a double
mathematical pendulum in the study of
oscillations, as a methodical manual and a
virtual laboratory in physics, informatics and
programming classes – for demonstration,
study and create applications in the objectoriented
C++ programming language
Creation of new types of special electric actuators for the oil and gas industry implies development of new approaches to simulation, design of the considered types of electric actuators. In addition, it requires development of new algorithms for creation of a complex of application programs of computer-aided design of special electric actuators. As process of simulation is quite labor consuming, it is offered to realize it gradually. In this article, the question of mathematical simulation of special electric actuators for the equipment of oil and gas branch using methods of electromagnetic conversion of energy is considered. Results of mathematical simulation were realized in the form of the program products, which are a part of system of computer-aided design
The typical scheme of sugar beet processing, used at
most sugar beet factories in Russia has not been
fundamentally changed for several dozens of years. As
a result, the performance indicators of domestic beetprocessing
enterprises are below the world average.
The article considers the technology of two-stage
extraction and subsequent lime-carbon dioxide raw
juice purification with the separation of the preliming
sludge and carrying out the carbonation treatment in
one step. The theoretical foundations of a two-stage
extraction of sucrose from sugar beet cossettes are
described and the main criteria for its implementation
are given. The chemistry of calcium compounds upon
activation of a suspension of saturation precipitation,
returned to a progressive preliminary defecation, is
shown. On that the increasing of sedimentationfiltration
properties of the preliming sludge is based
that allows its separation on the existing equipment in
based. The theoretical premises for carrying out
saturation in a homogeneous liquid-liquid environment
are given and practical principles for their realization
are described. The comparative evaluation of existing
and improved sugar beet processing technologies is
carried out. The improved technology makes it
possible to reduce the amount of raw juice while improving its purity, thereby reducing the
consumption of auxiliary materials, fuel and energy
resources, simplifying the technological scheme while
improving the quality of the purified juice, namely, its
higher purity, achieved by reducing the degree of
transition of high-molecular compounds in it and
increasing the effect of destruction of reducing
substances
Currently operating in autonomous systems of power
supply DC voltages power sources are secondary
sources for operation devices, protection and control
of generators, motors, stabilizers and inverters have
relatively low operational performance. The work
proposes to improve the weight and the size of power
supplies to apply a high frequency link in their
designs. We provide structural designs and the
peculiarities of operation of secondary power sources
with a high frequency link. This article discusses the
fundamental electrical circuits of pulse regulators,
converters based on resonant inverters and
transformers with rotating magnetic field. The use of
resonant inverters in power sources will significantly
improve their weight and overall dimensions. In
addition, the use of secondary sources of supply for
transformers with rotating magnetic field will
simplify their design and reduce the level of
electromagnetic interference generated by
semiconductor devices. The features of operation of
pulsed regulators and prospective structuralschematics
converters discussed in the article,
performed on resonant inverters and transformers
with rotating magnetic field, will increase the
effectiveness of pre-work on the development of
secondary power sources with improved operational
and technical characteristics for devices of operating,
control and protection