Comparative analysis of the results of field tests of the cross-country ability of an experimental venicle

Introduction. In the work of an agro-industrial enterprise, transportation of agricultural goods in field conditions is an important stage of the technological process, the implementation of which arises difficulties associated with the condition and type of soil of the supporting surface, rugged terrain, which ultimately affects the increase in the time of transportation of goods, the presence of downtime in the work of the main and auxiliary equipment, disruption or increase in deadlines for completing types of work. Increasing the mobility of movement of road freight vehicles for agriculture and increasing their cross-country ability on various soils of the supporting surface, regardless of weather conditions, is an urgent task, one of the directions for solving which is the use of vehicles with a combined method of movement – rolling and walking. To study the operation of a car with a combined mode of transportation, an experimental vehicle was designed that allows choosing a mode of transportation depending on the adhesion properties with the supporting surface.

Object. The object of the study is a comparative analysis of the results of field tests of the support cross-country ability of an experimental vehicle on wet plowed soil, a wet dirt road, and dry loose sand.

Materials and methods. The supporting cross-country ability of the experimental vehicle on the bases of wet plowed soil, wet dirt road and dry loose sand was determined by visual and instrumental measurement of the following indicators: the amount of current consumed by the motors, the distance traveled, the depth of the rut, and the degree of soil compaction. Based on the results of the study, dependency graphs were constructed, preferred indicators were determined, and conclusions were drawn.

Results and conclusions. A comparative analysis of the results of field tests showed that movement by walking, compared to rolling, leaves a rut of less depth on the supporting surface, the degree of soil compaction decreases, and the current consumption of the electric motors that ensure the forward movement of the experimental vehicle decreases.

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