Theoretical Investigations of the Headland Turning Agility of a Trailed Asymmetric Implement-and-Tractor Aggregate

Volodymyr Bulgakov, Simone Pascuzzi, Hristo Beloev and Semjons Ivanovs
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Volodymyr Bulgakov: Department of Mechanics, Faculty of Construction and Design, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine
Simone Pascuzzi: Department of Agricultural and Environmental Science, University of Bari Aldo Moro, 70126 Bari, Italy
Hristo Beloev: Department of Agricultural Machinery, University of Ruse “Angel Kanchev”, Studentska 8, POB7017 Ruse, Bulgaria
Semjons Ivanovs: Faculty of Engineering, Latvia University of Life Sciences and Technologies, LV-2130 Jelgava, Latvia

Agriculture, 2019, vol. 9, issue 10, 1-11

Abstract: Turning time occupies a significant part of the operations carried out by implement-and-tractor aggregates, especially in fields with short runs. Incorrectly executed turns increase the width of the turning strips, significantly increasing the idle path of the implement-and-tractor aggregate, with negative effect on its efficiency. The objective of this paper was to theoretically analyse the turning agility of an asymmetric implement-and-tractor aggregate, taking into account its forward speed and design parameters. Considering a trailed asymmetric swath reaper and tractor aggregate, the obtained equations allowed a numerical simulation in order to evaluate the headland turning agility of this implement-and-tractor aggregate. The minimal radii of the trailed asymmetric swath reaper and tractor aggregate are, respectively, 8.33 m for right-side turn and 4.90 m for left-side turn. Furthermore, the optimal angle between the longitudinal axis of the aggregating tractor and the hitch bar of the trailed asymmetric implement exists only in the case of left-side U-turns and its value is 1.12 rad (64°). It is not possible to cover right-side U-turns or both right- and left-side pear-shaped loop-turn in the optimal mode.

Keywords: asymmetric aggregate; turning radius; turning manoeuvre; headland width; turning agility (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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