Abstract
Route planning, also known as pathfinding is one of the essential elements in logistics, mobile robotics and other applications, where engineers face many conflicting objectives. One major challenge in dealing with multi-objective pathfinding problems is that several different paths can map to the same objective values. Since typical multi-objective optimization algorithms focus on the selection mechanism in the objective space, such multi-modal solutions cannot be easily found. In this paper, we propose a new methodology for preserving a good diversity of solutions in the decision space, which is tailored for pathfinding problems. We measure the similarity between the solutions in the decision space using the discrete Fréchet distance measurement, which is meant as a replacement for the well-known crowding distance measurement. We examine the proposed approach in three different variations on a variety of benchmark instances.
This work is funded by the German Federal Ministry of Education and Research through the MOSAIK project (grant no. 01IS18070B).
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Weise, J., Mostaghim, S. (2021). Many-Objective Pathfinding Based on Fréchet Similarity Metric. In: Ishibuchi, H., et al. Evolutionary Multi-Criterion Optimization. EMO 2021. Lecture Notes in Computer Science(), vol 12654. Springer, Cham. https://doi.org/10.1007/978-3-030-72062-9_30
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