In this paper authors described the algorithm for matching and harmonization the results of traction tests of domestic and foreign tractors according to the OECD and ISO systems. The results of the calculations are entered into the designed database, which contained 5 information blocks and control block. The control unit allows to implement a number of information requests (in terms of operating mass, maximum traction power, etc.). Information of agricultural tractors tests is contained in this database, test were made in Germany (11 models), France (8 models), Italy (8 models), and Austria, India, South Korea (over 37 models) according to OECD standards, each model tested on 2 type of covering: concrete and stubble.
To analyze the positive influence of the technological module on the fluctuations of the external load of the tractor, the methods of statistical dynamics are used. A dynamic model of a process module with two rotating masses is considered: the rim and tire of the drive wheel and the translational mass of the process module. Using the transfer function, the spectral functions of the output process (the horizontal component of the force on the MTZ-82 tractor) were determined when performing a machine-tractor unit (MTA) technological operation with heavy disks (BDT-7) intended for a class 3 tractor. The developed mathematical model of the technological module allowed us to construct theoretical spectral densities of the horizontal component of the force on the tractor hitch when completing it with the technological module. The use of the process module allows the frequency range of forces on the tractor hitch to be shifted to a lower zone from 0 to 2.5 Hz, excluding high-frequency components compared to the standard configuration of the tractor.
The technological provision of peasant farms is characterized by a deficit in their fleet of tractors of classes 2, 3. As a promising direction for solving this problem, it is proposed to develop a technological module that allows increasing the versatility of class 1.4 tractors by transferring them to a higher traction class. To calculate the rated power of the engine of a tractor of class 1.4, when operating it with a technological module, a method is proposed that takes into account the design features of the modular construction of a machine-tractor unit.
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