scholarly journals Justification of design parameters of a disk working body with a changing radius of curvature

2020 ◽  
Vol 193 ◽  
pp. 01014
Author(s):  
Vladimir I. Konovalov
Keyword(s):  
Technological Process ◽  
Soil Treatment ◽  
Design Parameters ◽  
Radius Of Curvature ◽  
Archimedes Spiral ◽  
Design Scheme ◽  
Working Surface ◽  
Working Bodies

In recent years, the improvement of the technological process of soil treatment is based on the use of working bodies with a curved shape of the working surface, which can increase the agro-technical and reduce the energy-intensive parameters of soil treatment. Agricultural units with disk working bodies are one of the most common machines in agriculture. The article presents a design scheme of a disk working organ with a working surface made along the Archimedes ’ spiral. Expressions are obtained for designing the working surface of the disk with the specified initial parameters.

scholarly journals Kinematic Analysis of a Disk Working Body with a Changing Radius of Curvature

2021 ◽  
Vol 346 ◽  
pp. 03007
Author(s):  
Vladimir I. Konovalov ◽  
Sergey I. Konovalov ◽  
Viktor I. Baradakov
Keyword(s):  
Technological Process ◽  
Kinematic Analysis ◽  
Energy Intensity ◽  
Arbitrary Point ◽  
Radius Of Curvature ◽  
Working Surface ◽  
Working Bodies

In recent years, the improvement of the technological process of tillage is based on the use of working bodies with a curved shape of the working surface, which can increase the agrotechnical rates of tillage and reduce its energy intensity. Agricultural implements with disk working bodies are among the most common machines in agriculture. The article presents a kinematic analysis of a disk working body with a changing radius of curvature. Expressions for determining the coordinates, velocity, and acceleration of the arbitrary point on the working surface are obtained.

scholarly journals Development of a structural and functional diagram of an aggregate for grinding and incorporating coarse stem plant residues into the soil

2020 ◽  
pp. 36-43
Author(s):  
V. A. Volsky ◽  
R. V. Kotsyubansky
Keyword(s):  
Quality Indicators ◽  
Technological Process ◽  
Operating Conditions ◽  
Functional Diagram ◽  
Design Parameters ◽  
Plant Residues ◽  
Plant Debris ◽  
Operating Modes ◽  
Plant Environment ◽  
Working Bodies

Annotation Purpose. Increasing the efficiency of crushing operations and embedding coarse-stem plant residues into the soil due to the improvement of the technological process using a combined unit containing a crusher roller, disc working bodies and a compactor roller. Methods. The research was carried out using synthesis analysis, correlation-regression analysis, which makes prediction of the output quality and energy indicators for certain operating conditions and certain parameters of the combined machine for processing corn stubble. The rational values of design parameters and operating modes were determined based on the results of solving the problem of optimizing energy costs and quality indicators within one module with established internal factor relationships and relationships that arise when working bodies interact with the plant environment and soil. Results. A structural and functional diagram of a combined unit has been developed, in which a shredder roller in combination with a disc harrow and a compactor roller improves the quality of processing operations with simultaneous crushing and harvesting plant residues into the soil. The trailed combined unit contains a towing device, a frame, support wheels for moving in the transport position, a section of crusher rollers, a section of cut spherical disc working bodies, a section of solid spherical disc working bodies, mechanisms for adjusting the angles of attack of sections of spherical discs, sections of compaction rollers. Conclusions 1. The technological process of crushing (up to 5 cm) of plant residues of coarse-stem crops, their earning, mixing with the soil and spreading over layers to a depth of 25 cm, rolling the treated soil and leveling the field surface has been improved, reduces the development of corn moth. 2. A structural-functional diagram has been developed and a combined unit has been manufactured, the main difference of which is the use of a mounted module-roller-grinder, which intensifies the grinding process and earns coarse-stem plant residues into the soil, increases the quality indicators of the technological operation by the amount of crushed plant residues less than 5 cm to 70–80%. Keywords: corn, plant debris, grinding, making plant debris, tillage, combined unit.

Justification of design parameters of the fractional reaping conveyor and its devices for removal of beveled stems from under the wheels of the vehicle

2019 ◽  
Vol 1 (3) ◽  
pp. 1-10
Author(s):  
Mikhail M. Konstantinov ◽  
Ivan N. Glushkov ◽  
Sergey S. Pashinin ◽  
Igor I. Ognev ◽  
Tatyana V. Bedych
Keyword(s):  
Optimal Design ◽  
Technological Process ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Optimal Parameters ◽  
Belt Conveyor ◽  
Grain Crops ◽  
Mode Of Operation ◽  
Optimal Values ◽  
Main Component

In this paper we consider the structural and technological process of the combine used in the process of separate harvesting of grain crops, as well as a number of its parameters. Among the main units of the combine, we allocate a conveyor and devices for removing beveled stems from under the wheels of the vehicle. The principle of operation of the conveyor at different phases of the Reaper and especially the removal of cut stems from under the wheels of the vehicle during operation of the Reaper. The results of theoretical studies on the establishment of the optimal design of the parameters of the belt conveyor are presented, the ranges of their optimal values are considered and determined. Studies on the establishment of optimal parameters of the screw divider in the Reaper, which is the main component of the device for removal of beveled stems, are presented. Taking into account the optimal design and mode of operation of the screw divider, the correct work is provided to remove the cut stems from under the wheels of the harvester.

Optimization Analysis of the Wedge Block Surface of NYD Contact Backstop

2013 ◽  
Vol 433-435 ◽  
pp. 2277-2281
Author(s):  
Quan Wei Wang ◽  
Ming Hui Wang ◽  
Dong Li ◽  
Dian Mao Wan ◽  
Rong Meng
Keyword(s):  
Cross Section ◽  
Design Parameters ◽  
Optimization Analysis ◽  
Archimedes Spiral ◽  
The Cross ◽  
Section Curve ◽  
Relationship Of ◽  
The Relationship

By analyzing the relationship of the design parameters of NYD contact backstop, the cross-section curve of the wedge block has been discussed as Archimedes spiral, logarithm spiral and arc. Each curve is designed optimally using MATLAB optimization toolbox. The merits and drawbacks of each curve are discussed.

Optimizing a Modular Half-Speed Synchronous Generator and Implementing Its Voltage Control System Based on a Neural Network

2021 ◽  
Vol 7 (7) ◽  
pp. 61-70
Author(s):  
Andrey A. TATEVOSYAN ◽  
Keyword(s):  
Neural Network ◽  
Control System ◽  
Permanent Magnets ◽  
Magnetic System ◽  
Voltage Control ◽  
Synchronous Generator ◽  
Voltage Regulation ◽  
Design Parameters ◽  
Design Scheme ◽  
The Neural Network

A method for optimizing the parameters of a modular half-speed synchronous generator with permanent magnets (PMSG) and the generator voltage control system with a neural network-based algorithm are proposed. The basic design scheme of the modular half-speed PMSG is considered, which features a compact layout of the generator main parts, thereby ensuring the optimal use of the working volume, smaller sizes of the magnetic system, and smaller mass of the active materials used in manufacturing the machine. Owing to the simple and reliable design of the generator, its output parameters can be varied in a wide range with using standard electrical circuits for voltage stabilization and current rectification along with an additional voltage regulation unit. Owing to this feature, the design scheme of the considered generator has essential advantages over the existing analogs with a common cylindrical magnetic core. In view of these circumstances, the development of a high-efficient modular half-speed PMSG as an autonomous DC power source is of both scientific and practical interest; this generator can be used to supply power to a large range of electricity consumers located in rural areas, low-rise residential areas, military communities, allotments etc. In solving the problem of optimizing the generator’s magnetic system, the main electrical machine analysis equation is obtained. The optimal ratios of the winding wire mass to the mass of permanent magnets and of the PM height to the air gap value for achieving the maximum specific useful power output have been determined. An analytical correlation between the optimal design parameters of a half-speed modular PMSG and its power performance parameters has been established. The expediency to develop a neural network-based control system is shown. The number of load-bearing modules of the half-speed PMSG is determined depending on the wind velocity, load factor and the required output voltage. The neural network was trained on the examples of a training sample using a laboratory test bench. The neural network was implemented in the MatLab 2019b environment by constructing a synchronous generator simulation model in the Simulink software extension. The possibility of using the voltage control system of a half-speed modular PMSG with a microcontroller for operation of the neural network platform of the Arduino family (ArduinoDue) independently of the PC is shown.

scholarly journals Parameters and modes of the technological process of scattered rice sowing

2021 ◽  
Vol 285 ◽  
pp. 02007
Author(s):  
Ivan Masienko ◽  
Sergey Shevchenko ◽  
Kirill Glytyan
Keyword(s):  
Technological Process ◽  
Radius Of Curvature ◽  
Theoretical Studies ◽  
Technological Operation ◽  
Design Features ◽  
Operating Modes ◽  
Seed Material

The paper presents the determination of main parameters and operating modes of scattered centrifugal devices of technical units when using them in the technology with scattered sowing when performing the technological operation of sowing rice in liquid-flexible soil. Theoretical studies of the dependence of design features of the blade of a spreading disk on the number of blades installed on it and the radius of curvature of the end bend on the height of blades are carried out. The values of the diameter of the disk of a centrifugal dispenser and parameters of blades are set, which will increase the uniformity of distribution of seed material for a given width of a gripper and reduce its consumption.

Substantiation of amplitude-frequency characteristics and design parameters of vibration exciter in volume oscillation separator

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
I Palamarchuk ◽  
◽  
V Vasyliv ◽  
V Sarana ◽  
M Mushtruk ◽  
...  
Keyword(s):  
Translational Motion ◽  
Operating Conditions ◽  
Design Parameters ◽  
Vibration Velocity ◽  
Vibration Exciter ◽  
Lagrange Equations ◽  
Bulk Materials ◽  
Vibrating Screen ◽  
Working Bodies ◽  
Oscillating Motion

The main effects of the developed design for vibratory separator: the increased driving force in the process of bulk material separation in this work, achieved by providing the working cylindrical-conical container with vibrational motion; improving the conditions for the passage of product particles through openings, achieved by providing the sieve surface with volume oscillations; reduction of energy consumption and improvement of operating conditions for support nodes during the operation of the designed vibrating screen, achieved due to the installation of additional elastic elements between the separator body and bearing assemblies of the vertical drive shaft in vibration exciter. Providing the working bodies of the designed vibrating screen with volume oscillating motion allows increasing the performance and quality of the separation process of solid bulk materials. To determine the rational parameters for vibration screening process, the equations of motion of working bodies as a conical sieve surface were obtained using the method of the Lagrange equations of the second order. When applying solutions of the Cauchy problem for linear nonhomogeneous differential equations, the solution of the latter was obtained. The obtained dependences of oscillation amplitudes, vibration velocity and vibration acceleration, and the intensity of oscillating motion allowed us to perform a mathematical analysis for power and energy parameters of vibration drive in the developed separator. The inclined placement of the conical sieve surface allows for spatial gyration or circular translational motion, which makes it possible to realize the advantages of volumetric separation of bulk materials. The results of the conducted analytical study made it possible to substantiate the optimal inclination angle for working sieve surface. Based on our analysis, the design parameters of vibration exciter were substantiated and clarified, and the design of this technical system was demonstrated.

scholarly journals Theoretical and experimental substantiation of the design parameters for the working body of a row cultivator

2019 ◽  
Vol 126 ◽  
pp. 00051 ◽  
Author(s):  
Evgeny Zykin ◽  
Svetlana Lazutkina
Keyword(s):  
Weed Control ◽  
Cultivated Plants ◽  
Design Parameters ◽  
Weed Plants ◽  
Working Bodies ◽  
Experimental Substantiation

The authors of the article propose the design of a row cultivator, equipped with combined working bodies, which makes it possible to carry out inter-row weed control in one pass with full cultivation of the protective zones of grown crops. The soil drop distance and the distance between the flat discs located in the adjacent gangs of the row cultivator for thorough covering weed plants with a layer of soilwithout damage to cultivated plants have been substantiated theoretically.

Investigation of the process of cutting seedling roots when pruning and digging out

10.12737/4529 ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 216-219 ◽  
Author(s):  
Казаков ◽  
V. Kazakov ◽  
Казаков ◽  
I. Kazakov
Keyword(s):  
Mechanical Strength ◽  
Technological Process ◽  
Geometric Parameters ◽  
Seedling Roots ◽  
Root Cutting ◽  
Working Bodies

The features of the process performed with root cutter and plant lifter, as well as the forces acting on their working bodies are examined. It was established that resistance to the root cutting increases with an increase in their number and diameter, but also depends on their mechanical strength. The studies obtained dependences of forces acting on the working bodies in accordance with their geometric parameters and specific application of technological process that can be used in the development of root cutters and plant lifters.

Experimental Analysis of Self-Folding SMA-Based Sheet Design for Simulation Validation

2014 ◽  
Author(s):  
Aaron C. Powledge ◽  
Darren J. Hartl ◽  
Richard J. Malak
Keyword(s):  
Performance Metrics ◽  
Permanent Deformation ◽  
Material Behavior ◽  
Image Correlation ◽  
Design Parameters ◽  
Radius Of Curvature ◽  
Element Analysis ◽  
Performance Metric ◽  
3D Digital Image Correlation ◽  
Thermally Actuated

The goal of this research is to experimentally characterize the capabilities of a concept for a self-folding reconfigurable sheet for use in origami-inspired engineering design and to use this characterization to validate simulations of physics-based models of the sheet. The sheet consists of an active, self-morphing laminate that contains two shape memory alloy (SMA) mesh layers and a passive compliant medium between these layers. The SMA layers are thermally actuated, allowing bending to occur in both positive and negative directions to create soft hill and valley folds. These folds are completely reversible, allowing the structure to fold and unfold without permanent deformation. Unlike past work on self-folding structures, these sheets can have folds along any line, be subsequently unfolded, and then be folded again in a new way. To explore the effect of changing design parameters on the performance metrics of the sheet, it is desirable to use Finite Element Analysis (FEA) simulations instead of relying on time consuming experiments. Such models have been created incorporating user material subroutines (UMATs) in an FEA solver such as Abaqus to capture material behavior, but these must now be validated against experimental data to establish how well they match experimental performance. The primary performance metric of the sheet was chosen to be the radius of curvature measured perpendicularly to the line of heating. Both experiment and simulation focus on the radius of curvature achieved by the sheet for a given set of design parameters and actuation path. The goal of validation is to achieve a desirable level of agreement and repeatability in these results. To measure the deformation and curvature in the sheet as it actuates, a 3D Digital Image Correlation (3D DIC) system is employed to track the movement of points along the surface of the sample as it is heated to a temperature above the transformation temperature of the SMA and allowed to fully actuate. These tools are utilized for a number of samples so that validation of the sheet encompasses multiple values for each of the primary design parameters.

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