Theoretical Study on Power Performance of Agricultural Gantry Systems

Goal. To determine the physical-and-mechanical properties of soil traces of a constant technological track and their influence on the adhesion and traction of the bridge agricultural vehicle of a new design. Methods. Theoretical research was conducted using the basic provisions of the tractor theory. Experimental studies were conducted in the soil channel according to generally accepted and developed methods using modern laboratory control and measuring equipment. The results of the experimental study were processed by statistical methods on a PC using the basic provisions of correlation analysis. Results. For the bridge agricultural tool of a new design, which was used as an object of experimental research, with repeated passes of its running wheels, it was found that the traces of a constant technological track have density and hardness in the upper soil layer (0-5 cm), which significantly depend on its humidity. Thus, a high non-linear correlation is established between the hardness and density of the soil trace of the constant technological track, which is approximated by a quadratic dependence. This makes it possible at its practical use to predict the value of the density of traces of a constant technological track based on the results of hardness measurements and vice versa, which will ensure the effective use of the bridge agricultural tool. Besides, to ensure maximum traction and traction of the running wheels of the bridge agricultural vehicle during its movement on the soil track of the constant technological track, it is established that increasing the hardness of the latter requires increasing the air pressure in its tires and vice versa. Conclusions. Study of the properties of soil traces of a permanent technological track shows that with increasing humidity of the soil trace of the track from 10 to 45%, the density in it, i.e. in its layer, which is equal to 0-5 cm, decreases from 1.60 to 1.30 g•cm-3, hardness-from 4.5 to 2.8 MPa. It was also found that with increasing the hardness of the traces of the constant technological track from 1.0 to 3.5 MPa, the air pressure in the tires of the wheels of the bridge agricultural vehicle should be increased from 60 to 650 kPa, i.e. 10 times. For tire brands used in this bridge tool, the pressure should be 160 kPa. Therefore, the effective operation of this bridge agricultural tool with the maximum pressure in the tires of its running wheels is possible only with the hardness of the traces of the constant technological track 2.25 MPa and above.

show abstract

“…Research methods. The physical object of experimental research was the bridge agricultural unit of our construction [10] (Fig. 1).…”

Section: Purpose Of Researchmentioning

confidence: 99%

Investigation of properties of the constant technological track, which is used in bridge agriculture

Аdаmchuk¹,

Булгаков²,

Kuvachov³

et al. 2020

Visnyk agrarnoi nauky

View full text Add to dashboard Cite

show abstract

“…A promising direction for further agricultural development worldwide is the introduction of innovative technologies, which include the track farming system [1][2][3][4][5]. The latter provides the basis for the automation and robotisation of most crop production processes, ensures the effective implementation of precision and digital farming and offers other significant benefits [1][2][3][4][5][6][7][8][9][10]. A wide span tractor is an agricultural power tool with a long support beam.…”

Section: Introductionmentioning

confidence: 99%

“…1 [11]. In the future, the wide span tractor will be in demand not only as a traction machine, but also as the power base for various wide span farming operations [10]. Given the general structure of the chassis and the steering mechanism of axle-driven machines, it has been scientifically proven that the simplest option is the on-board (power-driven) steering.…”

Section: Introductionmentioning

confidence: 99%

Study of passive steering of wide span vehicles with power-driven steering method

Аdаmchuk

Bulgakov

Ivanovs

et al. 2023

22nd International Scientific Conference Engineering for Rural Development Proceedings

View full text Add to dashboard Cite

One of the defining areas for further research in the world is the development of a set of technological measures for the introduction of resource-saving technologies and technical means, ensuring reduction in the need for material, technical and energy resources. The introduction of track and bridge systems in farming, the basis of which is a wide-span bridge traction vehicle, is really promising in this respect. The development of power-driven agricultural axle traction machines brings forward the necessity of setting and solving the problems of uncontrolled (passive) driving with its own tasks and solution methods. The aim of this research is to investigate uncontrolled passive steering of a bridge vehicle with power steering. The methodological basis of the theoretical research was the system approach, mathematical modelling, the laws of theoretical mechanics, the theory of tractors and vehicles, information technology and the use of PCs. A prototype of a wide span vehicle has been used as the object of experimental investigations. As a result of this research, it was found that the maximum value of asymmetrically applied shear pulling force of the wide span vehicle corresponds to the direction when its line of action passes through the centre of mass. For 1 kN of traction resistance of the bridge machine under study, the lateral slip when it moves along the compacted soil track of a constant tramline for each 1 m of the distance travelled was 0.011…0.015 m. In any deviation from this direction, there is an instantaneous rotational movement (shear) of the wide span vehicle where the total shear force is less than the maximum value. The anisotropy of this process results in a reversal of the hodograph towards a lower coefficient of traction of the wide span vehicle thrusters on the bearing surface of the permanent technological track. The adequacy of the meta-mathematical models of the passive steering of the bridge vehicle with the power method of control allows the solution of problems such as calculation of the minimum turning radius, evaluation of the technological track width, calculation of the maximum traction forces, selection of the rational control scheme under steady driving conditions, calculation and reduction of power on the turn, calculation of the maximum dynamic loads at the moment of active driving and others.

show abstract

“…Analysis of recent research and publications. Scientists from all over the world now make a great contribution to the development and popularization of track and bridge agriculture [8,[10][11][12]. The materials published by them can be divided into several categories.…”

mentioning

confidence: 99%

Meat productivity of calves of Simmental breed in the conditions of global climate change in the Steppe zone of Ukraine

Kozyr¹

2020

Visnyk agrarnoi nauky

View full text Add to dashboard Cite

Goal. To assess the technical implementation and production efficiency of bridge mechanization for the track system of agriculture in the technological processes of tillage and application of technological materials (on the example of an agricultural tool with a developed design). Methods. Experimental studies were performed according to both conventional and developed methods using a modern strain gauge and control measuring equipment with the analog-to-digital conversion of signals from information sensors. Results. According to the results of experimental studies of the bridge agricultural unit as a part of agricultural tools for surface tillage, high adaptability to the implementation of technological processes for tillage has been proved. Comparative graphs are built of normalized correlation functions and normalized spectral densities of profiles of irregularities of traces of a constant technological track and profiles of irregularities of agrophones after the passage of a toothed harrow, as well as a S-shaped spring ripper, and also a rotary harrow. Based on them, it is established that the work of agricultural tools for surface tillage has a good effect on the nature of the non-uniformity of oscillations of their traction resistance. Conclusions. The main generator of the formation of irregularities of the longitudinal profile of the soil traces of the constant technological track is the parameters of the soil hooks of the tires of the wheels of the bridge agricultural unit. The oscillations of the irregularities of the profiles of the treated agrophones by the bridge agricultural unit with attached agricultural tools (S-shaped spring ripper and rotary harrow) are smoother as a result of the movement of the agricultural unit along the compacted traces of a constant technological track. The quality of tillage with units based on bridge agricultural unit is approximately the same as in similar traditional machine-tractor units. But the specific energy consumption per 1 ha of the cultivated area with new units is lower by 40%.

show abstract

Theoretical Study on Power Performance of Agricultural Gantry Systems

Cited by 16 publications

References 10 publications

Investigation of properties of the constant technological track, which is used in bridge agriculture

Investigation of properties of the constant technological track, which is used in bridge agriculture

Study of passive steering of wide span vehicles with power-driven steering method

Meat productivity of calves of Simmental breed in the conditions of global climate change in the Steppe zone of Ukraine

Contact Info

Product

Resources

About