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At present, quite widespread is the electric drive for a railroad turnout based on a sequentially-excited DC electric motor. Such drives are open and non-regulated, which leads to more often disorders in the mechanical part of a railroad turnout. It is an obvious decision to upgrade existing electric drives by introducing new control systems in combination with available electromechanical systems that would make it possible to regulate the coordinates of current, speed, and displacement. This could contribute to the improved operational efficiency and reliability of railroad turnouts. In addition, a railroad turnout is operated under different weather conditions and various combinations of perturbating factors, which is why investigating the dynamics of railroad turnouts should take into consideration all technological features of the structure. These include gaps, the forces of elasticity and internal viscous friction, that is, a varying value for the coefficient of friction between switches and crossing surfaces. To effectively manage the process of switch turning, one considers control systems over electric drive with the help of modal and subordinate regulation systems. The system with subordinate regulation of coordinates, as the most widespread in the DC electric drives, in which the minimum number of feedbacks successfully implements ANALYSIS OF OPTIMIZATION CRITERIA FOR THE PROCESS OF SWITCH DISPLACEMENT IN A DC RAILROAD TURNOUT

Analysis of optimization criteria for the process of switch displacement in a DC railroad turnout