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arXiv 2304.00342cs.ROcs.AIcs.MA
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多智能体基于采样的运动规划的因子分解

Factorization of Multi-Agent Sampling-Based Motion Planning

ETH Zürich(苏黎世联邦理工学院)

Alessandro Zanardi, Pietro Zullo, Andrea Censi, Emilio Frazzoli

AI总结:

本文将因子分解概念集成到基于采样的算法中,通过启发式将智能体子集解耦至独立低维空间,将搜索空间维度增长从指数级降至线性,在保持最优性与完整性同时减少所需样本。

摘要:

现代机器人技术通常涉及在共享环境中运行的多个具身智能体。在这种情况下,路径规划比单智能体场景要困难得多。尽管标准的基于采样的算法(SBAs)可用于在机器人的联合空间中搜索解决方案,但随着智能体数量的增加,这种方法很快在计算上变得不可行。为了解决这个问题,我们将因子分解的概念集成到基于采样的算法中,这只需要对现有方法进行极少的修改。在搜索解决方案时,一旦使用因子分解启发式方法确认不同智能体子集的未来解将彼此独立,我们就可以将这些子集解耦(即因子分解)为独立的低维搜索空间。因此,我们逐步构建一个精简的超图,其中某些(超)边将智能体拆分为独立的子图。在最佳情况下,这种方法可以将搜索空间维度的增长从随智能体数量呈指数级降低为线性增长。平均而言,在保持SBAs的最优性、完整性和随时特性的同时,找到高质量解所需的样本更少。我们提出了因子分解SBA的通用实现,推导了PRM*在样本复杂度方面的解析增益,并展示了RRG的实证结果。

英文摘要:

Modern robotics often involves multiple embodied agents operating within a shared environment. Path planning in these cases is considerably more challenging than in single-agent scenarios. Although standard Sampling-based Algorithms (SBAs) can be used to search for solutions in the robots' joint space, this approach quickly becomes computationally intractable as the number of agents increases. To address this issue, we integrate the concept of factorization into sampling-based algorithms, which requires only minimal modifications to existing methods. During the search for a solution we can decouple (i.e., factorize) different subsets of agents into independent lower-dimensional search spaces once we certify that their future solutions will be independent of each other using a factorization heuristic. Consequently, we progressively construct a lean hypergraph where certain (hyper-)edges split the agents to independent subgraphs. In the best case, this approach can reduce the growth in dimensionality of the search space from exponential to linear in the number of agents. On average, fewer samples are needed to find high-quality solutions while preserving the optimality, completeness, and anytime properties of SBAs. We present a general implementation of a factorized SBA, derive an analytical gain in terms of sample complexity for PRM*, and showcase empirical results for RRG.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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