Refined method for determining the current agricultural machinery tire wearing surface area

Abstract

It has been established that the predictive assessment of the level of impact on the soil of tractors and agricultural machines is based on the calculation of the specific pressure equal to the ratio of the vertical load to the propeller contact surface area. A mathematical model is proposed that has been developed based on the results of field tests of a large number of samples of agricultural tires. The adequacy of the model was assessed using the Nash-Sutcliffe efficiency coefficient.

Practical assessment of agricultural tractor wheel slip using a single-frequency GNSS receiver using direct Doppler measurements

“…During the second pass, in the same sections of the field, values 𝑛 𝑊𝑖 were recorded for slip calculation according to formula (1) and, with an interval of 1 s, values 𝑣 𝑎𝑐𝑡 and 𝑛 𝑒 for slip calculation according to formula (2).…”

“…This is due to the fact that currently used crop cultivation technologies require a large number of passages of machinetractor units across the field. At the same time, the running systems of tractors, acting on the soil, over compact it, worsen the structure, composition, porosity, ultimately having a negative impact on the productivity of fields and energy consumption for their subsequent processing [1][2][3].…”

Improving the efficiency of machine and tractor units using an intelligent telemetry system

“…An excess of coupling weight, in turn, also leads to a decrease in productivity, increased losses on the self-movement of the tractor, and overcompaction of the soil. Thus, according to research by American engineers from the Alberta Agricultural Engineering Research Center, due to the operation of tractors at low-economy engine operating modes and with inappropriate ballast, 567.8 million liters of diesel fuel are wasted annually in the United States [7][8][9].…”