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arXiv 2108.00745cs.ROcs.AI
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基于安全区间路径规划的多目标搜索算法

Multi-objective Conflict-based Search Using Safe-interval Path Planning

Carnegie Mellon University(卡内基梅隆大学);Texas A&M University(德州农工大学)

Zhongqiang Ren, Sivakumar Rathinam, Maxim Likhachev, Howie Choset

摘要:

本文讨论了一个推广的著名的多智能体路径寻找(MAPF)问题,同时优化多个相互冲突的目标,如旅行时间和路径风险。这种概括,被称为多目标MAPF(MOMAPF),出现在几个应用范围从危险材料运输到建筑工地规划。在本文中,我们提出了一种新的多目标冲突为基础的搜索(MO-CBS)的方法,依赖于一种新的多目标安全区间路径规划(MO-SIPP)算法,其低级别的搜索。我们首先开发了MO-SIPP算法,展示了它的性质,然后将它嵌入到MO-CBS中。我们提出了广泛的数值结果表明:(1)有一个数量级的改善,在平均低级别的搜索时间,和(2)一个显着的改善,找到帕累托最优的前沿的成功率可以得到使用所提出的方法相比,以前的MO-CBS。

英文摘要:

This paper addresses a generalization of the well known multi-agent path finding (MAPF) problem that optimizes multiple conflicting objectives simultaneously such as travel time and path risk. This generalization, referred to as multi-objective MAPF (MOMAPF), arises in several applications ranging from hazardous material transportation to construction site planning. In this paper, we present a new multi-objective conflict-based search (MO-CBS) approach that relies on a novel multi-objective safe interval path planning (MO-SIPP) algorithm for its low-level search. We first develop the MO-SIPP algorithm, show its properties and then embed it in MO-CBS. We present extensive numerical results to show that (1) there is an order of magnitude improvement in the average low level search time, and (2) a significant improvement in the success rates of finding the Pareto-optimal front can be obtained using the proposed approach in comparison with the previous MO-CBS.

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