Formation of multi-group trains is aimed at arranging their cars in a given order and is one of the mass operations performed at railway. In this regard, the reduction of the duration of shunting operations for the formation of multi-group trains is an urgent task for railway transport. In this paper, for a discrete deterministic-controlled system that simulates the operation of the flat yard, a mathematical statement of the problem of choosing the optimal order of multigroup train formation is obtained. The set of possible states of the system under study and the transitions between them are presented in the form of directed graph, which made it possible to reduce the problem of choosing the order of train formation to the problem of searching the shortest paths on the graph. An algorithm of searching the optimal order of train formation is proposed.
Purpose. The purpose is the improvement of the method of choosing the retarding regimes of cut rolling within the particular group in order to increase the quality of interval speed control of cuts at the automated hump. Methodology. Simulation method was used for research the trains’ breaking up process at the hump. Findings. The separation conditions of cuts within the particular group and their relation between the retarding regimes of cut control based on a system approach were studied. Interval between cuts within the particular group at the switches and retarders were considered simultaneously. The features of interval controlling at the classification humps with different mutual alignment of the first switch and master retarder were stressed. Originality. The researches found out that during optimization of the retarding regimes of cuts within the particular group one should provide the best conditions of cuts separation at the switches and retarders. Practical value. The problem of choosing the retarding regimes of cuts within the particular group is optimized formally. This retarding regime allows maximizing the minimum value of interval between cuts within the group.
The method of calculation of probabilities of discontiguous cuts’ divisions on the switch points is developed. The researches as for connection these probabilities with the parameters of the trains are executed. The researches also tackle the problem of the connection between the above mentioned probabilities and the construction of the hump neck.
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