LENGTH OF CLOSED FISHTAIL-SHAPED TURNS AND HEADLAND WIDTH WHEN PLOUGHING WITH A REVERSIBLE PLOUGH IN AN IRREGULARLY SHAPED FIELD
ДЪЛЖИНА НА ЗАТВОРЕНИ ГЪБОВИДНИ ЗАВОИ И ШИРОЧИНА НА ИВИЦАТА ЗА ЗАВИВАНЕ ПРИ ОРАН С ОБРЪЩАТЕЛЕН ПЛУГ В ПОЛЕ С НЕПРАВИЛНА ФОРМА
DOI : https://doi.org/10.35633/inmateh-79-20
Authors
Abstract
The efficiency of agricultural operations depends on the length of non-working passes in the headlands. Therefore, the aim is to minimize both turn length and headland width. Various methods are used to construct turn trajectories, allowing them to be compared under specific conditions and enabling the most efficient movement pattern to be selected. This article examines closed fishtail-shaped turns composed of arcs with a given radius and straight-line segments. Analytical relationships were derived to determine the headland width and the length of closed fishtail-shaped turns for different travel directions of a machine-tractor unit equipped with a mounted reversible plough in an irregularly shaped field. It was found that, at a positive angle between the travel direction of the unit and the field boundary, movement of the unit across the field from right to left results in shorter closed fishtail-shaped turns and requires a narrower headland than movement from left to right.
Abstract in Bulgarian



