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Theoretical Consideration of The Controllability Indicator of Machine-Tractor Unit Movement

References FAROBIN, А. Ja. 1970. Theory of Turning of Transport Machines. Moscow : Маshinostrojenie, 1970. 174 pp. GJACHEV, L.V. 1981. Stability of Motion of Agricultural Machines and Machine-Tractor Units. Мoscow : Маshinostrojenie, 1981. 206 pp. GRECENKO, A. 1984. Operation on steep slopes. State-of-the- Art Report. In Journal of Terramechanics, vol. 21, 1984, no. 2, рp. 181-194. GUSKOV, V. V. - VELEV, N. N. - АTAMANOV, Ju. E. et al. 1988. Tractors: Theory. Моscow : Mashinostroenie, 1988. 376

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On Changes in Concept and General Composition of Agricultural Tractors

Abstract

Conclusions on the analysis of the state of development in the tractor industry are formulated, aspects of the forecasting concept of transformation, general layout solutions and the theory of promising tractor units with new propulsion systems are considered, a general approach to the pre-design substantiation of new generation tractors is presented.

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Determination of the Trajectory of Curvilinear Motion of Front Steering Wheels Driven Tractor

Abstract

The issue of designing the machine tractor movement trajectory is relevant today because its optimization significantly reduces fuel consumption and thus the transport costs. Proper choice of the energy machine and agricultural machinery with economy consumption of fuel and lubricants is also crucial. Recently, the problem has received scant attention in scientific literature. Therefore, this study analytically determines the trajectory of turning the tractor with front steering wheels and attempts to describe the curvilinear trajectory of a four-wheeled tractor using parametric equations in Cartesian coordinates. Its outcomes have a number of important implications for future practice; they are applicable e.g. in planning curved trajectories when cornering the tractor during field processing or in fuel and time consumption predictions for certain operations.

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Experimental Study of Operational Properties of Two-Machine Drilling Aggregate

Abstract

The purpose of this study is to improve the technical and economic performance of the enhanced two-machine seeder based on the wheel-type tractor of traction class 1.4. Experimental research is based on the general provisions of the standard methodology for operational and technological evaluation of the operation of machine-tractor units in the field. Processing of results from experimental study was carried out by means of developed programs on a PC. Results obtained from field experiments testing the aggregate consisting of two-machine seeder of traction class 1.4, two SZ-3.6 seeders and a semi-mounted coupler indicate its high operational and technological efficiency in comparison to both single-machine and similar two-machine units as part of a conventional trailer hitch. Although it shows an increase in specific time losses at headland of up to 5%, due to the wider working width, utilization of a new two-machine unit on the basis of a semi-mounted coupling in comparison with a single-machine unit allows increasing the productivity of the work by 1.96 and reduction of fuel consumption by 20%. In order to ensure that two-machine unit will perform turning on headland in the optimal mode, it is necessary to equip it with a special automatic device that would change the speed of movement in compliance with the angular speed of tractor‘s steering wheels according to the developed algorithm.

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Time usage and efficiency of machinery during stump crushing

Abstract

This study was carried out at a roadside landing of the Augustów Forest District in order to determine the structure of a typical working day for machines involved in stump crushing as well as the overall efficiency of the process and the machinery's fuel consumption. The machines involved in the entire process were a front-loader, a shredder, a screen and a truck-tractor unit.

Machinery activity was recorded using a sampling method with a three-minute interval. During 16 hours of observation, 533 stumps were crushed to produce 362 m3 lv of timber particles in total and the average operational productivity reached 28 m3 lv h−1. Based on the amount of consumed fuel and its energy content, the energy input of the process was calculated to be 103.33 MJ m−3 lv which is 3640.53 MJ m−3 lv less than the output of energy gained at the power plant. Total CO2 emissions of the processing machinery and transport off the forest site were estimated using previously published data and amounted to 7.58 kg m−3 lv.

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Using Service Simulating Test in Designing of Tillage Combine

References AKBARNIA, A. - FARHANI, F. - HEIDARY, B. 2013. Economic comparison of tillage and planting operations in three tillage systems. In Agricultural Engineering International: CIGR Journal, vol. 15, no. 4, pp. 180-184. BULGAKOV, V. - ADAMCHUK V. - NADYKTOZ, V. - KYURCHEV, V. - NOZDROVICKY, L. 2017. Thеоretical consideration of the controllability indicator of machine-tractor unit movement. In Acta Technologica Agriculturae, vol. 20, no. 1, pp. 11-18. GALAMBOŠ, R. - GALAMBOŠOVA, J. - RATAJ, V. - KAVKA, M

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Virtual Modelling and Laboratory Research of Parameters of Planting Unit’s Working Parts

. – JARLAN, L. – RODRIGUEZ, J. C. – HAGOLLE, O. – WATTS, C. 2015. Impact of sowing date on yield and water use eciency of wheat analyzed through spatial modeling and Formosat-2 images. In Remote Sensing, vol. 7, pp. 5951–5979. BULGAKOV, V. – ADAMCHUK, V. – NADYKTO, V. – KYURCHEV, V. – NOZDROVICKÝ, L. 2017. Theoretical consideration of the controllability indicator of machine-tractor unit movement. In Acta Technologica Agriculturae, vol. 20, no. 1, pp. 11–18. ERMAKOV, V. V. 2013. Results of experimental research on planting sugar beet at various speeds. In

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