A Mathematical Model of Plane-Parallel Movement of the Tractor Aggregate Modular Type

Bulgakov, Volodymyr; Aboltins, Aivars; Ivanovs, Semjons; Holovach, Ivan; Nadykto, Volodymyr; Beloev, Hristo

doi:10.3390/agriculture10100454

Cited by 9 publications

(9 citation statements)

References 13 publications

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“…The product δ A •T B gives the value of the tire yaw resistance coefficient (k B ). After determining this parameter, guided by the methodology described by [29], it is possible to calculate the required air pressure on the tires of the steering wheels of the tractor. Similarly, you can carry out this step when determining the tires of the air pressure in the rear wheels.…”

Section: Discussionmentioning

confidence: 99%

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Findura,

Nadykto,

Kyurchev

et al. 2024

Applied Sciences

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Due to the negative impact of chemical inter-row weed control on the environment, mechanical weed control is increasingly used in practice. Machine-tractor units (MTU) are used with the row cultivator’s rear and frontal central position for its implementation. We have designed a unit in which side cultivators are used along with the central one. This paper considers the transverse movement kinematics of such an MTU’s outside right and left cultivators’ working devices in the horizontal plane. The present emulation of side machines is made by changing the longitudinal coordinate of their location relative to the tractor’s front and rear axles. Calculations have established that the frontal cultivator responds more intensively to the control action by changing the turning angle of the tractor’s steering wheels. However, if the value of this parameter is less than 2.75°, a rear-mounted cultivator is preferred, because in this case, the values of lateral deviations for the external, left, and right working device are smaller. When the turning angle of tractor wheels is from 1° to 3° (typical for MTU row work), a threefold increase in the working width of the cultivator causes a slight antiphase deviation in its external working devices (an increase or decrease in the amplitude of these deviations does not exceed 4%). The model that we have developed allows us to select the values of the MTU design parameters for which the lateral displacement will be very small (close to zero). As the turning angle of the tractor wheels increases to 3°, the external left and right working devices of the cultivators react inversely. This means that in the case of the rear machine, the values of lateral displacements increase, while in the case of the front machine, they decrease. At a turning angle of the tires of the tractor wheels close to 2.5°, the lateral displacements for the rear and front machines are the same.

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Section: Discussionmentioning

confidence: 99%

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Findura,

Nadykto,

Kyurchev

et al. 2024

Applied Sciences

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“…The paper uses the coefficient of determination 2 R and the mean absolute percentage error MAPE for the analysis and evaluation. The following is the calculation formula of coefficient of determination 2 R .…”

Section: The Comparative Analysis Methods For the Hst Adjustable Speed Transmission Characteristicsmentioning

confidence: 99%

“…With the continuous development of agricultural modernization and intelligence levels, studies on the techniques of agricultural machinery, such as tractors, are increasingly improved [1][2][3][4][5][6]. Tractors generally work in the conditions of severe environment and variable load.…”

Section: Introductionmentioning

confidence: 99%

Research on Load Disturbance Based Variable Speed PID Control and a Novel Denoising Method Based Effect Evaluation of HST for Agricultural Machinery

Cheng

2021

Agriculture

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This paper aims to realize and improve the constant speed control performance of tractors with HST (Hydrostatic Transmission) variable speed units. To achieve this, based on the HST test bench of the tractor, we perform a verification test of the adjustable speed characteristics, a denoising filter test of the response signal, a test on the influence of the load disturbance on the adjustable speed characteristics and a PID-based constant speed performance detection test. The results of the verification test of the adjustable speed characteristics show that the theoretical value and actual value of the adjustable speed transmission characteristics of the HST used are essentially consistent with each other. The results of the test of the load disturbance’s influence on the adjustable speed characteristics show that the increase in load torque inhibits the HST output response. Therefore, the paper proposes and designs a PID-based closed-loop constant speed control system. The paper uses a step response test and a load disturbance test to research the control result of the constant speed system. Collecting and analyzing all test results, we find that the constant speed control based on PID has a very good result. The average error between the average HST output speed and the target speed set was 0.37%, and the average standard deviation of output speed was 1.18 rpm. In addition, the paper proposes a denoising method combing the empirical mode decomposition method and the Gaussian distribution determination. The method shows that the first two orders of the components of the HST response signal should be removed as noise. The paper uses the denoised signal and the partial least squares method to analyze the influencing factors of the constant speed control result. The analysis results show that the rate of change of load torque has the biggest influence on the stability of HST output speed, followed by the target value.

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“…The investigation was conducted using the provisions of analytical geometry and differential calculus, the theory of agricultural machines, methods of compiling programs for numerical calculations on a PC [13][14][15]. A characteristic feature of the operation of the vertical rotor blades is that they are installed on the upper and the lower beaters, which rotate on the same shaft due to the planetary gear in opposite directions with a gear ratio of 2.39, and also taking part in two movements simultaneously: the forward movementtogether with the potato harvester, and the rotary movement around the rotor axis.…”

Section: Methodsmentioning

confidence: 99%

Theoretical investigation of rotary digging tool parameters for potato tubers

Bulgakov

Holovach

Bonchik

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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The development, design and research of the parameters of new potato harvesters is an important and urgent task in the field of potato production. The aim of this research is to substantiate rational design and kinematic parameters of the lower and the upper blades of the beaters of the vertical rotor of a potato harvester by determining the velocities of collision of the blades with the tuberous layer of their most characteristic points. Theoretical investigations have been carried out, and then, using the calculations on a PC, graphical dependencies of the main parameters of the process under study were constructed. The values of absolute velocities of collision of the lower and upper blades of the vertical rotor beaters, respectively, at the initial and final points with the tuberous layer of the soil, were determined. The values of the absolute velocities of collision of the lower and the upper blades of the vertical rotor blades were determined, respectively, at the initial and final points with the tuberous layer of the soil. Rational kinematic parameters of the lower and the upper blades of the vertical rotor beaters are calculated, respectively, at the initial and the final points, where the greatest destruction of the tuberous layer occurs. For the lower blade of the beater, the absolute collision speed at the angle of rotation ωnt = 120º at the starting point is Vsp n = 1.69 m•s -1 , at the end point -Vsp n = 1.94 m•s -1 . For the upper blade of the beater, the absolute speed of collision at a terming angle ωbt = 120º at the starting point is Vsp b = 1.63 m•s -1 , at the end point -Vsp b = 1.92 m•s -1 . The angular velocity of the rotational motion of the upper and the lower rotor blades was equal to ω = 10.46 s -1 .

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A Mathematical Model of Plane-Parallel Movement of the Tractor Aggregate Modular Type

Cited by 9 publications

References 13 publications

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Research on Load Disturbance Based Variable Speed PID Control and a Novel Denoising Method Based Effect Evaluation of HST for Agricultural Machinery

Theoretical investigation of rotary digging tool parameters for potato tubers

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