scholarly journals Optimization of Parameters and Operating Modes of Vibration roller

2020 ◽  
Vol 9 (5) ◽  
pp. 579-585
Keyword(s):  
Winter Wheat ◽  
Soil Compaction ◽  
Optimization Criterion ◽  
Regression Equation ◽  
Spring Stiffness ◽  
Optimal Parameters ◽  
Fisher Criterion ◽  
Operating Modes ◽  
Minimum Value ◽  
Modes Of Vibration

The optimal parameters and operating modes of vibratory roller for soil compaction after sowing winter wheat were substantiated. For objective function - the optimum coefficient of variation of density of soil during operation of vibratory roller for compacting winter wheat regression equation was obtained in the planning according to the Вк plan of the experiment. The adequacy of model according to Fisher criterion, the significance and reliability of coefficients of regression equation was established. The response surface obtained by the shape of hyperboloid rotation was studied, twodimensional sections of three factors were constructed on optimization criterion. With its minimum value, the optimal parameters of vibratory roller were established: the mass of roller is 293 kg, the spring stiffness is 11.95 kN/m, the working speed of roller is 9.6 km/h. The minimum value of optimization criterion is 10.43%.

scholarly journals Experimental Studies on Oscillation Modes of Vibration Separation Devices

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
M. Demianenko ◽  
M. Volf ◽  
I. Pavlenko ◽  
O. Liaposhchenko
Keyword(s):  
Alternative Energy ◽  
Gas Flow ◽  
Separation Efficiency ◽  
Rapid Development ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Operating Modes ◽  
Physical Experiments ◽  
Modes Of Vibration ◽  
Separation Devices

Despite the rapid development of alternative energy sources, the role of hydrocarbons in the global fuel and energy balance remains significant. For their transportation and further processing, pre-processing is carried out using a set of equipment. In this case, the mandatory devices are separators. In terms of specific energy consumption and separation efficiency, methods based on the action of inertia forces are optimal. However, standard designs have common disadvantages. A method of dynamic separation is proposed to eliminate them. The proposed devices are automatic control systems. The object of regulation is hydraulic resistance, and elastic forces are the regulating actions. Aerohydroelastic phenomena accompany the operation of dynamic separation devices. Among them, the most interesting are flutter and buffeting. Oscillations of adjustable baffles accompany them. It is necessary to conduct a number of multifactorial experiments to determine the operating parameters of dynamic separation devices. In turn, physical experiments aim to identify patterns and features of processes occurring during vibration-inertial separation (i.e., the dependence of various parameters on velocity). Therefore, the article proposes a methodology for carrying our physical experiments on dynamic separation and a designed experimental setup for these studies. As a result, the operating modes of separation devices for different thicknesses of baffle elements were evaluated. Additionally, the dependences of the adjustable element’s deflections and oscillation amplitudes on the gas flow velocity were determined for different operating modes of vibration separation devices.

scholarly journals Optimization of Parameters and Operating Modes of Disc Sowing Device According to Seeding Uniformity Criterion

2018 ◽  
Vol 28 (3) ◽  
pp. 379-388
Author(s):  
Vladimir A. Ovchinnikov ◽  
Mikhail N. Chatkin ◽  
Alena V. Ovchinnikova
Keyword(s):  
Experimental Studies ◽  
Operating Conditions ◽  
Design Parameters ◽  
Optimal Parameters ◽  
Plant Growth And Development ◽  
Important Condition ◽  
Operating Modes ◽  
Favorable Conditions ◽  
Uniformity Criterion

Introduction. When cultivating agricultural crops, it is necessary to take into account the plants’ need for moisture, nutrients, location by area of nutrition, determining illumination, etc. Taking into account the biological characteristics of crops, various methods of sowing are used to create favorable conditions for plant growth and development. An important condition for sowing is the uniform arrangement of seeds along the sulcus, especially in the cultivation of testes of small-seeded cultures. A key role in the uniformity of seeding is provided by the design parameters and kinematic operating conditions of the sowing device. Materials and Methods. To determine the optimal parameters and operating modes of the disk sowing device, methods of factor experiment and multi-criteria optimization were used. Results. Mathematical models of the technological process of sowing seeds were obtained based of experimental studies. Conclusions. To ensure the improvement of the seeding quality of small seeds, the design parameters of the experimental seeder: х4 – is the diameter of the cell; х5 – the number of cells on the disk, will tend to the maximum values. The optimum circumferential speed of the sowing disk should be in the range from 0.127 to 0.192 m/s, and the speed of the machine’s movement is no more than 2 m/s.

scholarly journals Method for Optimizing the Kinematic Scheme of Stretch-Forming Parts from Sheet Blanks

2021 ◽  
Vol 346 ◽  
pp. 01030
Author(s):  
Konstantin Bormotin ◽  
Anton Krivenok ◽  
Maria Pogartseva ◽  
Min Ko Hlaing
Keyword(s):  
Optimal Control ◽  
Optimal Control Problems ◽  
Optimization Criterion ◽  
Control Problems ◽  
Optimal Parameters ◽  
Kinematic Scheme ◽  
Stretch Forming ◽  
Forming Process ◽  
Residual Displacements ◽  
Simulation Results

The modeling of the stretch-forming process a sheet on a punch is considered. A numerical method has been developed for solving the optimal control problems of the stretch-forming process sheet blanks. The values of the residual displacements are considered as an optimization criterion. The algorithms implemented in CAE allow calculating the optimal parameters for the operation of the CNC stretch-forming press. The simulation results are compared with full-scale experiments on the shaping of sheet parts on a stretch-forming press T-600.

scholarly journals OPTIMIZATION OF PARAMETERS OF THE MOBILE MACHINE ADAPTIVE HYDRAULIC CIRCUIT

2021 ◽  
Vol 13 (3) ◽  
pp. 14-21
Author(s):  
Yurii Buriennikov ◽  
◽  
Leonid Kozlov ◽  
Oana Rusu ◽  
Viktor Matviichuk ◽  
...  
Keyword(s):  
Hydraulic System ◽  
Control Valve ◽  
Fast Response ◽  
Optimization Criterion ◽  
Pressure Differential ◽  
Hydraulic Circuit ◽  
Operating Modes ◽  
Differential Control ◽  
Mobile Machine ◽  
Hydraulic Circuits

Mobile machine hydraulic circuits tend to adopt electrohydraulics. Such hydraulic circuits are based on controlled pumps, modulated hydraulics, sensors and controllers. This allows adapting the hydraulic circuit operating modes to the changes of external conditions of the machine operation. Application of hydraulic circuits with electrohydraulics in mobile machines allows to use mobile machines efficiently with a high number of removable endangers, increases their performance and improves the quality of performed works. The authors propose an adaptive hydraulic circuit for a mobile machine. The operation process in the adaptive hydraulic circuit in static and dynamic modes is determined by the interaction of the pump controller and pressure differential control valves. The hydraulic system operation stability, its fast response and readjustment are determined by the controller parameters. It has been revealed that the main parameters affecting the dynamic characteristics of the hydraulic system are: throttle area and coefficient of amplifying the pump controller orifice, dampener area and coefficient of amplifying the pressure differential control valve orifice. These parameters affect the stability, controlling and readjustment time in the hydraulic circuit differently. A functional including the values of controlling time , σ controlling and losses in the pump controller was used as an optimization criterion. The optimization has been made according to the developed mathematical model applying the method developed by I. Sobol and R. Statnikov. During the optimization each controller parameter changed on 3 levels. 81 tests were made and the best combination of controller parameters for the optimization criterion was determined. The following hydraulic circuit operation values were reached under the optimal values of parameters = 1.0·10-6 m2, = 1.0·10-3 m, = 1.2·10-6 m2, = 10·10-3 m: = 1.1 с, σ = 32 %, = 0.82 kW that comply with the requirements towards hydraulic circuits of mobile machines.

scholarly journals Optimization of daily operation mode of photovoltic systems of enterprises

2021 ◽  
Vol 264 ◽  
pp. 04063
Author(s):  
Tulkin Gayibov ◽  
Elnur Abdullaev
Keyword(s):  
Mathematical Model ◽  
Renewable Energy Sources ◽  
Operation Mode ◽  
Distribution Networks ◽  
Photovoltaic System ◽  
Optimal Parameters ◽  
Manufacturing Enterprises ◽  
Operating Modes ◽  
Mode Of Operation ◽  
The Mathematical Model

At present, one of the most important issues at the level of various manufacturing enterprises is the development of ways for building and efficiently using renewable energy sources, especially solar energy. In this regard, this article proposes a mathematical model of the problem of determining the optimal daily mode of operation of a photovoltaic system in an enterprise with a private photovoltaic system connected to the electrical system. The effectiveness of the mathematical model was analyzed on the example of determining the optimal mode of operation of the photovoltaic system located on the territory of Jizzakh Polytechnic Institute. It is shown that the mathematical model can be used to determine the optimal operating modes of existing photovoltaic systems in enterprises and distribution networks, as well as to determine the optimal parameters in their design.

scholarly journals Influence of soil tillage system on soil compaction and winter wheat yield

2020 ◽  
Vol 80 (1) ◽  
pp. 80-89 ◽  
Author(s):  
Milan Biberdzic ◽  
Sasa Barac ◽  
Dragana Lalevic ◽  
Aleksandar Djikic ◽  
Danijela Prodanovic ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Soil Compaction ◽  
Wheat Yield ◽  
Soil Tillage ◽  
Tillage System ◽  
Winter Wheat Yield

scholarly journals Research of a machine with a belt conveyor for drying grain

2020 ◽  
Vol 193 ◽  
pp. 01071
Author(s):  
Andrey Pavlushin ◽  
Sergey Sutyagin ◽  
Galina Karpenko ◽  
Vadim Artemiev
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Objective Assessment ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Conveyor Belt ◽  
Optimization Criterion ◽  
Regression Equation ◽  
Belt Conveyor ◽  
Grain Moisture

Currently, grain drying technology is imperfect. Therefore, the development and scientific substantiation of energy-saving, environmentally friendly installations for drying grain that meet the requirements of modern Russian agrarian production is an urgent and important scientific and technical task that is essential for the development of the country. To solve this problem, we have developed a contact-type installation with a belt conveyor. For an objective assessment of the research object, the specific energy consumption per 1 kg of evaporated moisture qуд, kJ/kg of moisture was taken as an optimization criterion. The study of the installation in the drying mode was carried out on oat grain. After processing the results of the experiments, a new equation was obtained. This is a regression equation in natural and coded values of independent factors. The regression equation characterizes the influence of independent factors on the optimization criterion. Having solved the regression equation, it was found that the minimum specific energy consumption for drying grain is 4388 kJ/kg of moisture. This value is achieved at an average temperature of the conveyor belt tᴤр = 60 °C and the residence time of grain in the installation τ>об = 40 s. In this case, the convergence of theoretical and experimentally obtained research results was at least 95%. The decrease in grain moisture during the heating cycle in the developed installation is 2 ... 2.5%, which corresponds to agrotechnical requirements. Thus, as a result of theoretical and experimental studies of the developed installation, it was revealed that with optimal values of independent factors, the specific energy consumption is 4388 kJ/kg of moisture, which is 1.5 times less compared to serial grain dryers, in particular, with the SZ - 1.

Methods of Laboratory Studies of the Star Draining Tillage Working Body

2021 ◽  
Vol 2 (43) ◽  
pp. 84-89
Author(s):  
Filipp L. Blinov ◽  
◽  
Andrey V. Kudryavtsev
Keyword(s):  
Subsurface Layer ◽  
Field Testing ◽  
The Body ◽  
Research Purpose ◽  
Optimal Parameters ◽  
Operating Modes ◽  
Operation Process ◽  
Optimization Parameters ◽  
The Moment ◽  
Operation Results

At the moment, the issue of creating and positioning tools for deep loosening of the subsurface layer and the formation of aeration drainage has been studied in detail. The modern market offers many different tools for deep loosening or moling, but according to the analysis of machines and tools, as well as promising developments presented in the form of patents, we can say that there are no systems capable of performing deep loosening and drainage operations together. (Research purpose) The research purpose is in creating a fundamentally new star-shaped design of a draining tillage working body that will be able to form an optimal water-air regime of the soil due to the formation of maximum aeration drainage per unit area, with simultaneous loosening of the subsurface horizon, excluding over-compaction of the near-drainage zone as part of the soil-forming system. (Materials and methods) To simulate the operation process, predict and identify the optimal parameters and operating modes, as well as to bring the developed working body to field testing, it is necessary to conduct a number of laboratory experiments and studies. The article presents the scheme of the laboratory installation and described the principle of its operation. (Results and discussion) The article presents a full factor experiment with three factors and three levels of variation in three-fold repetition to assess the influence of existing factors on the operation of the star-shaped drainage working body, the quality of the treatment of the subsurface horizon and the formation of drains, the interaction of factors with each other, as well as creation a mathematical model of the process of combined tillage, including the processes of deep loosening and aeration drainage. (Conclusions) The proposed method will allow us to more accurately and systematically identify the optimal parameters and modes of operation of the body, based on changes in the optimization parameters.

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