Investigation of wide span vehicle technological part movement stability

While driving a Wide Span Vehicle, depending on the conditions of its operation, the stability of movement of the agricultural machines, attached to it, may grow worse. Despite sufficient and thorough scientific research into the functioning of the mounted and semi-mounted agricultural machines on the mounted mechanisms of traditional tractors, the conditions for the stability of their movement on Wide Span Vehicles were not considered. Stable movement of an agricultural machine, coupled with a Wide Span Vehicle in the working position, can be ensured only on the basis of a correct choice of the design parameters of the mounted mechanism and the layout of the machine itself on it. However, scientists have not studied the effect of different schemes for connecting agricultural vehicles to the Wide Span Vehicle on the stability of their movement. The purpose of this research is to study the process of functioning of mounted agricultural machines on Wide Span Vehicles to ensure sufficient stability of movement from the position of satisfactory angular mobility of its technological part. Theoretical investigations, synthesis of the design schemes and parameters of the Wide Span Vehicle were carried out by modeling on a PC the conditions of its operation, using the basic principles of theoretical mechanics, tractor theory and the theory of automatic control of linear dynamic systems while reproducing statistically random control and disturbing input impacts. Experimental studies were performed, using both generally accepted and developed methods, and included use of modern control and measuring equipment. Processing of the experimental data took place on a PC, using a regression analysis. The physical object of the experimental research was a Wide Span Vehicle. As a result of the research, it was found that from the position of a more stable movement of the technological part of the Wide Span Vehicle (less vibrations), the advantage is given to the arrangement of an agricultural implement on a mounted mechanism behind the axis of its attachment since the dispersion of vibrations of the implement in this case is 33% less than in its variant of placement in front of its mounting axis. These oscillations are of low-frequency and constitute a spectrum of 0…0.16 Hz. Oscillations of the mounted mechanism of the Wide Span Vehicle in the option of placing an agricultural implement on the mounted mechanism in front of the suspension axis should be considered as a disturbing effect on the straight-line movement of the Wide Span Vehicle, and as a consequence an undesirable reaction and its undesirable rotation in one direction or another.