The problem of the lack of an algorithm for constructing the movement of special vehicles is considered. The aim of the research work is to develop a software package for calculating the rotation of a multi-link special vehicle, taking into account an algorithm that describes the characteristic features of vehicle movement. The increase in the dimensions and mass of long loads necessitates the creation of new vehicle designs, the distinguishing feature of which is multi-link and long wheelbase, which in turn reduces maneuverability and requires taking into account the peculiarities of movement along a curve. To study the process of moving special vehicles, a geometric modeling method was used to develop an analytical geometric model for the rotation of the tractor and semitrailer. Based on geometric modeling, a method for determining the turning characteristics of a multilink vehicle has been developed. It is shown that patency of special vehicles is no less important quality in comparison with durability; the law of changing the ratio of the angle of rotation of the steered wheels, the various axles should provide the maximum turning moment at maximum angles of rotation of the front steered wheels, and should also ensure equality of wear at small angles.
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