Relevant bibliographies by topics / Machine-tractor unit

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Machine-tractor unit'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Machine-tractor unit"

1

Bulgakov, Volodymyr, Valerii Adamchuk, Volodymyr Nadykto, Volodymyr Kyurchev, and Ladislav Nozdrovický. "Theoretical Consideration of The Controllability Indicator of Machine-Tractor Unit Movement." Acta Technologica Agriculturae 20, no. 1 (2017): 11–18. http://dx.doi.org/10.1515/ata-2017-0003.

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Abstract The paper is focused on the issues of controllability of machine-tractor units based on wheel-type tractors during their non-straight driving on the soil surface, which is positioned at an angle to the horizon. There were obtained analytical expressions for the determination of the actual indicator of control λd, including both the power and the design parameters of the machine-tractor unit, which affect the abovementioned indicator in the longitudinal vertical plane. These expressions are obtained for the tractor driving on both road and also driving during field operation. In addition, the paper discusses the conditions under which there may occur the cross-slip of the tractor steering wheels in the transversal horizontal plane. As a result of this review, there were obtained the analytical expressions for determining the required indicator of the controllability λd of machine-tractor unit in the horizontal plane, excluding the possibility of lateral sliding of the unit by turning its steering wheels at a certain angle. These expressions are obtained for the two modes of the machine-tractor unit: for driving during transport on the road and during the operation in the field. The machine-tractor unit based on the wheel-type tractor with rear mounted 3-mouldboard plough was analytically investigated. By means of computer calculations, there was observed the fact that when moving in non-straight direction on the soil surface, inclined to the horizon at an angle of 12°, the machine-tractor unit is controllable only when the angles of the steering wheel of the given tractor do not exceed 9°. During the working movement (ploughing) of the given machine-tractor unit on an inclined field surface, its controllability will be preserved on condition that the angle of the tractor steering wheels does not exceed 11°. According to obtained results, it can be stated that the controllability of the machine-tractor unit is determined by the indicator of controllability, taking into account the value of the vertical load acting on the tractor steering wheels, the possibility of their turning in the horizontal plane, as well as the withdrawal of the machine-tractor unit from rectilinear motion and its movement on the field surface, inclined at an angle to the horizon.
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2

Semichev, Stepan V. "The Results of Field Test of the Mounted Attachment CHD-3." Elektrotekhnologii i elektrooborudovanie v APK 67, no. 2 (2020): 81–86. http://dx.doi.org/10.22314/2658-4859-2020-67-1-81-86.

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One of the ways of achieving landing accuracy is the control of the unit movement using navigator installed on the tractor, including autopilot systems that can correct the trajectory of the tractor. However, the straightness of tillage may be low. (Research purpose) The research purpose is in increasing the track stability of agricultural tools when cultivating row crops. (Materials and methods) The article proposes the use of a controlled attachment as part of a machine-tractor unit with navigation equipment installed on both a tractor and an agricultural tool, the use of which will significantly improve the accuracy of technological operations. The article presents the scheme, technical characteristics, and operating principle of the controlled attachment device. The article describes the method of conducting a field test of a machine-tractor unit with an installed controlled attachment. (Results and discussion) It was found that when cultivating without navigation equipment, the deviation from the axis was 62 mm; when cultivating with a machine-tractor unit with navigation equipment on a tractor it reaches 22 mm; when cultivating with a machine-tractor unit with a controlled CHD-3 attachment and navigation equipment on a tractor and cultivator it reaches 20 mm. The untreated area of the field by a machine-tractor unit with CHD-3 and navigation equipment on a tractor and cultivator was 0.27 square meters in relation to 0.45 square meters when processing the unit as part of a tractor with navigation equipment and a cultivator. (Conclusions) The use of tool control devices for cultivating rows of potatoes is impractical, since the straight movement of the planting machine along a given line is not guaranteed when planting potatoes. It was found that increased accuracy and further productivity will be achieved when using a controlled attachment on all operations of potato cultivation up to harvesting. The use of a controlled attachment device is advisable when cultivating crops that require high precision planting, for example, sugar beets.
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3

Inshakov, A. P., O. F. Kornaukhov, and A. F. Filin. "A method of construction of measuring and computing system for machine-tractor units testing." Traktory i sel hozmashiny 79, no. 10 (2012): 14–15. http://dx.doi.org/10.17816/0321-4443-65971.

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The use of universal means of measurement of machine-tractor unit operation parameters in modern world technical inspection systems is analyzed. A scheme of a complex for the remote control of machine-tractor unit operation parameters is presented.
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4

Lysych, Mikhail. "RESEARCH OF DYNAMIC STABILITY OF THE MACHINE-TRACTOR UNIT ON THE VIRTUAL STAND." Actual directions of scientific researches of the XXI century: theory and practice 8, no. 1 (2020): 85–91. http://dx.doi.org/10.34220/2308-8877-2020-8-1-85-91.

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The questions of studying the dynamic stability of machine-tractor unit by the methods of multi-body dynamics (MBD) are considered. The study used a virtual stand created in CAD SolidWorks and CAE application SolidWorks Motion. It simulated the movement of the machine-tractor unit on the basis of the MTZ-82.1 tractor equipped with mounted modular implements. The motion surface has four different types of obstacles located in series in separate sections. To analyze the stages of the machine-tractor unit movement, we used the parameter of the lift height of the geometric center of each of the wheels above the supporting surface and the fact of the unit rollover. He showed that overcoming a single linear, single sequential and group linear obstacles at a speed of 3.22 m/s occurs without loss of stability. Only when overcoming a group sequential obstacle, significant fluctuations in the tractor frame are observed, however, due to the balancing suspension of the front wheels, they do not always lead to the rollover of the unit. In the future, using the developed virtual stand, it is possible to conduct studies of the dynamic stability of various configurations of the machine-tractor unit. In addition to the MTZ 82.1 tractor, models of other tractors can be used. It is also possible to change the geometry of obstacles, the angles of inclination of the supporting surface, speed mode, contact parameters, etc.
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Kambulov, S. I., V. B. Rykov, I. V. Bozhko, and V. V. Kolesnik. "Running gear of machine-tractor units and their influence on the quality of performed operations." Traktory i sel hozmashiny 84, no. 11 (2017): 15–20. http://dx.doi.org/10.17816/0321-4443-66330.

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The machine-tractor unit is a key element in an implementation of technological operations in the cropping. Running gears with wheeled and caterpillar propulsion device are used in the modern tractors. During an interaction of the ground with tractor propulsion devices, the ground is pulverized on one side and it is compacted on the other side during the slipping. Besides, the wheeled movers have the slipping several times higher than caterpillar movers. The aim of the research is an analysis of running gears of machine-tractor units and their influence on the quality of performed technological operations. The paper discusses an analysis of parameters of wheeled and replaceable caterpillar movers to the tractor K-701, which have the same dimensions. One of the main external influences on the unit is the surface profile of the field. The main source of tractor oscillations are the unevennesses of the way. At the same time, characteristic areas for the operation of machine-tractor units are very various, the most characteristic of them are a stubble field, a plowed field, a prepared field, a field road and others. The analysis of spectral densities of the surface profile of the field on which the tractor operates shows that with increasing speed, the spectral density decreases rapidly, and the maximum of the spectral density shifts toward higher values of the frequencies. It has been established that the frequency range, which has the greatest effect on the machine-tractor unit on the basis of the tractor K-701 on the replacement caterpillar mover 1...4 sec-1, on the wheel mover - 1...7 sec-1. The replaceable caterpillar mover for a 5 сlass tractor has significant advantages over a wheeled mover, since it filters (smoothes) 2,1...2,8 times more irregularities, which improves working conditions, smooth of running and other indicators of the machine-tractor unit.
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Parhomenko, S. G., and G. G. Parhomenko. "Mathematical modeling of functioning of a tillage machine-tractor unit." Traktory i sel hozmashiny 85, no. 4 (2018): 55–62. http://dx.doi.org/10.17816/0321-4443-66405.

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The soil-cultivating machine-tractor unit undergoes continuously changing external influences that lead to fluctuations in the speed of movement, slippage of the tractor's driving wheels, loading of the transmission, and increased fuel consumption. The main sources of disturbances that cause the oscillations of the tractor are the unevenness of the traction resistance of the tillers and the unevenness of the field microprofile. The purpose of the research is to improve the process of functioning of the soil-processing machine-tractor unit by modeling of the influence of external action. The mathematical model of the process of operation of a wheeled tractor in the traction mode of operation is a machine-tractor unit in the form of a dynamic system with two input forces, determined by the load on the working elements and the roughness of the relief. The mathematical model includes the equations of the motor and the regulator, the clutch, the power transmission, the driving wheel and the longitudinal-vertical oscillations of the tractor. The solution of the mathematical model of the machine-tractor unit is based on the fourth-order Runge-Kutta numerical integration method at a constant step. Calculations are made for the motion of the unit with periodic sinusoidal disturbances applied to the input of the model. As a result of calculations, it is determined that the effect of the microfield of the field and the traction resistance of the working bodies on the performance of the machine-tractor unit is different. The greatest amplitudes of vertical accelerations are achieved due to the effect of field unevenness. Fluctuations in the speed of movement, hectare fuel consumption, engine torque are caused by the periodic component of traction resistance of low frequency, and slippage and driving torque of the wheels - as well as unevenness of the field microfilm. The average values of the slippage of the tractor's driving wheels and hectare fuel consumption are mainly affected by the oscillations of the traction resistance. The use of diagonal-parallel tires instead of radial makes it possible to reduce the slipping of the tractor's drive wheels from 24 % (when working on serial tires) to 16 % (on test tires) and to reduce the hectare fuel consumption by 6 %.
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Tihanov, G. "Operational characteristics of direct sowing machine-tractor unit." Agricultural Science and Technology 12, no. 4 (2020): 331–34. http://dx.doi.org/10.15547/ast.2020.04.052.

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Abstract. A study on some operational characteristics of a direct sowing machine-tractor unit has been carried out in wheat sowing. It is performed by Horsch Avatar 6.16 SD direct seeder aggregated to John Deere 7250 R tractor. It was found that 91% of the area is sown at sowing rate of 195 kg seed/ha. The remaining 9% are sown either at lower or higher rate. Engine rotations of the seed unit have been established at work mode, i.e. when the seeder is sowing, these are 1594.81 min-1, in idle state the rotations are 912.08 min-1, and in transportation mode are 1860.36 min-1. The relative share of engine use has also been determined: when the seeder is sowing, it is 56.68%, when the seeder unit is in idle mode, it is 14.54% and when the unit is in transportation mode – 28.78%, respectively. The actual operation speed of the seeder unit when sowing wheat was 10.40 km/h and the real hourly productivity – 3.7 ha/h.
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Tihanov, G. "Operational characteristics of direct sowing machine-tractor unit." Agricultural Science and Technology 12, no. 4 (2020): 331–34. http://dx.doi.org/10.15547/ast.2020.04.052.

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Abstract. A study on some operational characteristics of a direct sowing machine-tractor unit has been carried out in wheat sowing. It is performed by Horsch Avatar 6.16 SD direct seeder aggregated to John Deere 7250 R tractor. It was found that 91% of the area is sown at sowing rate of 195 kg seed/ha. The remaining 9% are sown either at lower or higher rate. Engine rotations of the seed unit have been established at work mode, i.e. when the seeder is sowing, these are 1594.81 min-1, in idle state the rotations are 912.08 min-1, and in transportation mode are 1860.36 min-1. The relative share of engine use has also been determined: when the seeder is sowing, it is 56.68%, when the seeder unit is in idle mode, it is 14.54% and when the unit is in transportation mode – 28.78%, respectively. The actual operation speed of the seeder unit when sowing wheat was 10.40 km/h and the real hourly productivity – 3.7 ha/h.
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9

Troyanovskaya, I. P., and A. O. Zhakov. "Road holding ability of machine-tractor unit during plowing." Traktory i sel'hozmashiny 1, no. 6 (2020): 41–49. http://dx.doi.org/10.31992/0321-4443-2020-6-41-49.

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The discrepancy between the working width of the plow and the width of the tractor leads to asymmetry of the arable units. The geometry of the share surface of the reversible plow contributes to the generation of lateral forces on the working tool. All this contributes to the imbalance of the working body and the deviation of the tractor from straight-line movement during plowing. To maintain a straight line, the driver has to correct the vehicle movement every 5-10 meters, which makes him more tired. To study the causes of lateral slip of the plowing unit, a mathematical model was built. It consists of the equations of controlled motion and equations of uncontrolled shift of the tractor under the action of external forces from the plow. The description of the force interaction of the propeller with the ground is based on the mathematical theory of friction, taking into account anisotropy and elastic properties in contact. On the basis of the passive shear model, the hodograph of the maximum force shifting the tractor from the side of the working tool is constructed. It has been established that the shear force reaches its maximum adhesion value only in the case of trans-lational shear, when its line of action passes through the center of gravity of the tractor. In all other cases, the shift (pull) of the tractor is carried out by a force of a lower value. The features and as-sumptions of the model are formulated in relation to the tracked and wheeled tractors. As a result, it was found that regardless of the direction of the lateral displacement of the plow draft resistance, the tractor is pulled towards the plowed field. The result of the numerical experiment showed that the main reason for the drift of the wheeled arable unit is the different type of soil along the sides of the tractor, but not the displacement of the plow traction resistance.
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Bulgakov, Volodymyr, Aivars Aboltins, Semjons Ivanovs, et al. "Theory of Movement of Machine-Tractor Unit with Trailer Haulm Harvester Machine." Applied Sciences 12, no. 8 (2022): 3901. http://dx.doi.org/10.3390/app12083901.

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Harvesting sugar and fodder beet tops is a complex technological process that requires the use of special harvesting machines. Trailed harvesters of different rows, which together with aggregate tractors form symmetric or asymmetric machine-tractor units, the movement of which in the horizontal plane is not always stable, are widely used. The purpose of this study is to determine the parameters of stable plane-parallel motion of asymmetric harvester machine-tractor unit based on numerical computer simulation of the obtained analytical dependencies. According to the results of the analytical study, the values of the amplitude and phase-frequency characteristics of the turning angle tractor’s oscillations were obtained. They reflect the reproduction by the angle rotation fluctuations of the haulm harvester machine in the horizontal plane. Calculations have shown that reducing the value of the input resistance coefficient of pneumatic tires of the driving wheels of the aggregating tractor increases its sensitivity to the action of disturbing influences. The greater the sensitivity, the closer the wheels of the power tool are to the attachment point of the trailed haulm harvester. In qualitative terms, increasing the speed of the machine-tractor unit from 1.5 to 2.5 m∙s−1 leads to an undesirable increase in the amplitude-frequency response and desired increase in the phase-frequency response when reproducing its external disturbing effects in the form of oscillations of the angle of rotation of the harvester.
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Dissertations / Theses on the topic "Machine-tractor unit"

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Мітцель, Микола Олександрович. "Вплив особливих зон роботи гідропередачі на техніко-економічні показники колісних тракторів з безступінчастими гідрооб'ємно-механічними трансмісіями". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22578.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016 р. Дисертацію присвячено підвищенню техніко-економічних показників машинно-тракторних агрегатів оснащених гідрооб'ємно-механічними трансмісіями з диференціалом "на виході" за рахунок розміщення агротехнічних швидкостей в особливих зонах роботи гідрооб'ємної передачі. Складена комплексна математична модель особливих зон роботи гідрооб'ємної передачі, що дозволяє досліджувати робочі процеси в межах особливої зони. Розглянуто процес утворення особливої зони на висхідній та низхідній регулювальній характеристиці гідрооб'ємно-механічної трансмісії. Встановлено вплив режимів навантаження та конструктивних параметрів трансмісії на ширину особливої зони та загальний ККД трансмісії. Визначено вплив часу розгону колісного трактору на величину сплеску робочого тиску при виході з особливої зони. Сформульовано рекомендації до проектування перспективних схем трансмісій з диференціалом "на виході", що дозволять досягати максимального ККД трансмісії в межах швидкостей основних енергоємних сільськогосподарських операцій. Експериментальними дослідженнями визначено точність математичної моделі втрат в гідрооб'ємній передачі К. І. Городецького. Експериментально досліджено достовірність математичної моделі особливих зон на лабораторному стенді та колісному тракторі, та підтверджено рекомендації щодо перспективних схем гідрооб'ємно-механічних трансмісій з диференціалом "на виході".<br>The dissertation for obtaining a scientific degree of Candidate of Science (Technology) on the specialty 05.22.02 – automobiles and tractors. –National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2016. The dissertation is devoted to improving technical and economic indicators of machine-tractor units equipped input-coupled power-split hydrovolumetric mechanical transmissions by placing farming velocity in special areas of work hydrovolumetric transmission. Compiled complex mathematical model special zones of hydrovolumetric transmission that allows you to explore work processes within the special zone. The process of creation of special zones ascending for and descending regulating characteristics. The influence of the mode load and design parameters of the transmission to the width of the special zones and the overall efficiency of the transmission. The effect of time acceleration wheeled tractor a surge in the value of the operating pressure at the outlet of the special zones. Recommendations for the design of perspective schemes output coupled transmissions that will achieve maximum efficiency transmission speeds within the major energy intensive agricultural operations. Experimental studies determined the accuracy of the mathematical model of hydraulic losses in the transmission by K. Gorodetsky's mathematical model. Experimentally investigated the accuracy of the mathematical model of special zones on the laboratory stand and wheeled tractors, and found the references to perspective schemes input-coupled power-split hydrovolumetric mechanical transmissions.
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2

Мітцель, Микола Олександрович. "Вплив особливих зон роботи гідропередачі на техніко-економічні показники колісних тракторів з безступінчастими гідрооб'ємно-механічними трансмісіями". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22568.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016 р. Дисертацію присвячено підвищенню техніко-економічних показників машинно-тракторних агрегатів оснащених гідрооб'ємно-механічними трансмісіями з диференціалом "на виході" за рахунок розміщення агротехнічних швидкостей в особливих зонах роботи гідрооб'ємної передачі. Складена комплексна математична модель особливих зон роботи гідрооб'ємної передачі, що дозволяє досліджувати робочі процеси в межах особливої зони. Розглянуто процес утворення особливої зони на висхідній та низхідній регулювальній характеристиці гідрооб'ємно-механічної трансмісії. Встановлено вплив режимів навантаження та конструктивних параметрів трансмісії на ширину особливої зони та загальний ККД трансмісії. Визначено вплив часу розгону колісного трактору на величину сплеску робочого тиску при виході з особливої зони. Сформульовано рекомендації до проектування перспективних схем трансмісій з диференціалом "на виході", що дозволять досягати максимального ККД трансмісії в межах швидкостей основних енергоємних сільськогосподарських операцій. Експериментальними дослідженнями визначено точність математичної моделі втрат в гідрооб'ємній передачі К. І. Городецького. Експериментально досліджено достовірність математичної моделі особливих зон на лабораторному стенді та колісному тракторі, та підтверджено рекомендації щодо перспективних схем гідрооб'ємно-механічних трансмісій з диференціалом "на виході".<br>The dissertation for obtaining a scientific degree of Candidate of Science (Technology) on the specialty 05.22.02 – automobiles and tractors. –National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2016. The dissertation is devoted to improving technical and economic indicators of machine-tractor units equipped input-coupled power-split hydrovolumetric mechanical transmissions by placing farming velocity in special areas of work hydrovolumetric transmission. Compiled complex mathematical model special zones of hydrovolumetric transmission that allows you to explore work processes within the special zone. The process of creation of special zones ascending for and descending regulating characteristics. The influence of the mode load and design parameters of the transmission to the width of the special zones and the overall efficiency of the transmission. The effect of time acceleration wheeled tractor a surge in the value of the operating pressure at the outlet of the special zones. Recommendations for the design of perspective schemes output coupled transmissions that will achieve maximum efficiency transmission speeds within the major energy intensive agricultural operations. Experimental studies determined the accuracy of the mathematical model of hydraulic losses in the transmission by K. Gorodetsky's mathematical model. Experimentally investigated the accuracy of the mathematical model of special zones on the laboratory stand and wheeled tractors, and found the references to perspective schemes input-coupled power-split hydrovolumetric mechanical transmissions.
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Book chapters on the topic "Machine-tractor unit"

1

Durmanov, M. Ya, B. G. Martynov, and S. V. Spiridonov. "How Parameters of Agricultural Machine and Tractor Unit Affects Effectively Used Mean Indicated Power." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22063-1_33.

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2

Antipin, V. P., M. Ya Durmanov, and O. A. Mikhailov. "Method to Reduce Oil Burning in Diesel Engine of Agricultural Machine and Tractor Unit." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22063-1_34.

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3

Startcev, A., S. Romanov, and O. Vagina. "Research into the Course Stability of a Four-Wheel Drive Wheeled Machine–Tractor Unit." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-54814-8_70.

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Durmanov, M. Ya, B. G. Martynov, and S. V. Spiridonov. "Oil Consumption Through Burning in Heavy-Duty Operation of an Agricultural Machine and Tractor Unit." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-54817-9_25.

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Senkevich, Sergey, Veronika Duryagina, Vladimir Kravchenko, Irina Gamolina, and Dmitry Pavkin. "Improvement of the Numerical Simulation of the Machine-Tractor Unit Functioning with an Elastic-Damping Mechanism in the Tractor Transmission of a Small Class of Traction (14 kN)." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33585-4_20.

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Antipin, V. P., M. Ya Durmanov, and O. A. Mikhailov. "How the Parameters of an Agricultural Machine and Tractor Unit Affect the Wear of Friction Pairs in a Diesel Engine When Used for Transport." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-54817-9_24.

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Slepenkov, Alexander, Evgeny Kuznetsov, Sergey Shchitov, Tatiana Sharipova, Olga Shchegorets, and Andrey Burmaga. "Improving the Efficiency of Wheel-Wheeling Machine-Tractor Units in Areas with Special Natural and Climatic Conditions." In Fundamental and Applied Scientific Research in the Development of Agriculture in the Far East (AFE-2021). Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91402-8_5.

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8

Senkevich, Sergey, Vladimir Kravchenko, Pavel Lavrukhin, Pavel Ivanov, and Anna Senkevich. "Theoretical Study of the Effect of an Elastic-Damping Mechanism in the Tractor Transmission on a Machine-Tractor Unit Performance While Sowing." In Handbook of Research on Smart Computing for Renewable Energy and Agro-Engineering. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1216-6.ch017.

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The chapter deals with a numerical simulation of a machine-tractor unit with an elastic-damping mechanism installed between an engine and a tractor transmission while fulfilling an agricultural performance (sowing). The mechanism is a complex system. The description of an elastic-damping mechanism shows all its advantages. There has been given a theoretical substantiation of a transparency level effect on a machine-tractor unit performance while sowing. The purpose of the work is to conduct theoretical study to identify the effect of an elastic-damping mechanism in a tractor transmission on working characteristics of a sowing machine. There has been obtained a regression equation and identified optimum parameters of an elastic-damping mechanism installed in a tractor transmission. There has been also given a substantiation of an expediency to install an elastic-damping mechanism in a tractor transmission for sowing grain crops.
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Conference papers on the topic "Machine-tractor unit"

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Egorov, Nikolay, Farit Khaliullin, Zulfia Khaliullina, and Larisa Zimina. "Adaptive support for power units of machine-tractor unit." In 19th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2020. http://dx.doi.org/10.22616/erdev.2020.19.tf454.

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Samsonov, V. A., and Y. F. Lachuga. "TRACTION CHARACTERISTICS OF A TRACTOR WITH HIGH ENERGY SATURATION." In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.16-20.

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The efficiency of the machine-tractor unit depends on the operational energy saturation of the tractor, which is determined by the optimal ratio of the engine's operating power to the tractor's operating weight. The operational energy saturation depends on the operation performed. Conditional energy saturation is a constant indicator equal to the ratio of the rated power of the tractor to its operating weight. The article describes a method for calculating the traction characteristics of a wheeled tractor with an energy saturation of more than 23 W/kg.
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Shishkin, A. M., and I. S. Koshegarov. "MACHINES AND MECHANIC MEANS FOR FOREST PROTECTION FROM PESTS AND DISEASES IN THE REPUBLIC OF KAZAKHSTAN." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS Volume 2. DSTU-Print, 2020. http://dx.doi.org/10.23947/interagro.2020.284-286.

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The article presents a modern set of machines, mechanization tools and equipment for protecting the forest from pests and diseases in the Republic, the name and brand of machines, the traction class of the tractor with which these machines or their electric drive are aggregated. The main technical parameters are: performance per 1 hour / shift, total machine weight (kg), maintenance personnel, unit width (m) and tank capacity (l), if included in the design of the machine. Some list and conditions for performing technological works are also shown.
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Kokunova, I. V. "INTELLIGENT SOLUTIONS IN THE CONSTRUCTION OF MODERN BALING MACHINES." In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.208-212.

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The article shows the role of digital machine technologies used in feed production. The analysis of intelligent solutions used in the designs of modern balers from the world's leading manufacturers of agricultural machinery is carried out. It is noted that electronic systems not only perform information functions during the operation of forage harvesters, but also provide control over the operation of both individual assemblies and systems of balers, and the entire machine-tractor unit. Digital technologies make it possible to optimize the operation of the forage harvester, improve the quality of harvested forage, reduce environmental risks, improve the working conditions of machine operators, as well as increase the attractiveness and prestige of agricultural professions, and attract promising young personnel to agricultural production.
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5

Savchenko, O. F., and I. P. Dobrolyubov. "AUTOMATION OF THE DEVELOPMENT OF DIAGNOSTIC SYSTEMS FOR ASSESSING THE POWER OF TRACTOR ENGINES." In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.105-110.

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The article proposes a methodological approach to create a system of automation of the development of diagnostic systems for assessing the power of tractor engines, increasing their efficiency in solving the task of operational control of the energy parameters of the machine-tractor fleet in production conditions. The development phases in the form of methodical, organizational, information, software and technical support units are described. The method of constructing a logical scheme of the development algorithm is presented, formalizing the process of solving interconnected problems while synthesizing different structures of technical and software tools based on a set of mathematical models. The application of the methodology in the creation of a computer model of the two-mass system engine-working machine and the system of automation of the energy monitoring of the tractor park is shown.
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Heikkilä, Mikko, Mikko Huova, Jyrki Tammisto, Matti Linjama, and Jussi Tervonen. "Fuel Efficiency Optimization of a Baseline Wheel Loader and its Hydraulic Hybrid Variants Using Dynamic Programming." In BATH/ASME 2018 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fpmc2018-8853.

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In this paper, fuel consumption of a 5.7-ton municipal tractor in a wheel loader application is studied, and methods for improving the fuel efficiency are compared with each other. Experimental data from the baseline machine with load-sensing hydraulics has been gathered during a y-pattern cycle, and the data is inputted to an optimization function having realistic loss models for a hydraulic pump and diesel engine. Dynamic programming is used to analyze different system configurations in order to determine optimal control sequence for each system. Besides optimization of variable engine rotational speed on the baseline system during the working cycle (considering the point of operation), three hybrid supply systems are studied: 1) a hydraulic flywheel, 2) parallel supply pumps and 3) a throttled accumulator. These systems utilize a hydraulic accumulator as an energy source/sink alongside the diesel engine. The optimal sequence for charging and discharging of the accumulator is examined in order to minimize the fuel consumption of the machine. The idea is to use the lowest acceptable, constant engine rotational speed, to cut down the diesel losses. In addition, the study covers an analysis of adjusting the engine rotational speed for each point of operation also when the hybrid systems are considered. The results show that finding advantageous engine rotational speed for each loading condition can decrease the fuel consumption of the baseline machine around 14%, whereas hybridization of the supply system can further improve the result by a couple of percentage units. Hybrid systems also reduce engine’s maximum load by making it more uniform, which allegedly reduces emissions. The possibility of engine downsizing to further improve the fuel efficiency of hybrid systems is not considered, because the maximum engine power is usually determined by the hydrostatic transmission of a municipal tractor. However, the study assumes that actuators are controlled using traditional 4/3 proportional control valves; hence, there are still potential for greater fuel savings. For example, applying independent metering valves on the actuator control can further decrease the system losses.
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