The increasing demand for railway capacity leads the railway industry to explore the next generation signal system such as virtual coupling. In this paper, a coupling model is established for two trains coming from different lines in the junction area to improve the coupling efficiency. Firstly, a nonlinear discrete model is developed by defining the objective function as the negative coupled time, and it satisfies the constraints in the classical optimal train control problem (e.g., running resistance, speed limit, and the train characteristics). Particularly, the effect of the switch on Movement Authority (MA) of trains and the safety protection constraints (e.g., headway) are emphasized. Then, the nonlinear constraints are linearized by Piecewise Affine (PWA) approximation and logical variables such that the optimization problem is turned into Mixed Integer Linear Programming (MILP) which be solved by the existing solver. Finally, some cases are conducted to illustrate the effectiveness of the proposed approach.
Optimization of the coupling operation for train platoon in the junction area
2021-09-19
469184 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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