Segment-condition-based railway track maintenance schedule optimization

Reasonable maintenance plans are important for ensuring safe train operation and prolonging the service life of tracks. However, previous studies on the scheduling and optimization of railway track maintenance plans possess the following limitations. First, scheduling optimization models generally operate at the planning level with months as the time units rather than at the operation scheduling level with days as the time units. Second, they fail to consider the bidirectional feedback and dynamic impact between predicted condition and maintenance scheduling. Third, actual on-site operation strategies (e.g., opportunistic and centralized maintenance) are neglected. To address these issues, this paper proposes a novel operation-level maintenance scheduling framework based on segment condition considering both opportunistic and centralized maintenance strategies. According to the problem characteristics, ae hybrid multi-objective optimization algorithm based on a quantum-behaved particle swarm optimization was designed. Furthermore, by utilizing actual practical cases, the effectiveness of the model and algorithm was verified via comparison with MOPSO, NSGA-II, NSGA-III, and Gurobi in different scenarios.

Automated summary

This paper proposes a novel operation-level maintenance scheduling framework based on segment condition, considering both opportunistic and centralized maintenance strategies. The effectiveness of the model and algorithm is verified through the design of a hybrid multi-objective optimization algorithm.