The purpose of the study is construction of a model for predicting traction resistance of working bodies based on the selection of features, characterizing the parameters of machine operation for basic tillage. In order to achieve it, the authors performed a series of experiments in addition to the conducted field tests. The paper presents the results of measuring traction resistance for a share of сombined wide-cut unit type with varying of movement speed and tillage depth. Parametric statistics was used as a method of analyzing this data. The study showed that the type of distribution of traction resistance in groups, identified by tillage depth and movement speed, in most cases, was subjected to the normal distribution law. The results of Levene’s test do not confirm the uniformity of variances in the groups, which indicates a decrease in the accuracy of the assessment to 10 % (acceptable value). The observational data are independent; the average values in the groups do not coincide. Thus, the study groups are statistically different. To predict the traction resistance of working bodies for cultivation and pre-sowing cultivation, chisel cultivation, deep loosening, the authors constructed multiple nonlinear regression models with variables "depth tillage" and "movement speed".

Lenski Aleksandr V., Zheshko Aleksandr A., Aletdinova Anna A.

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