让机器人团队在不确定任务中高效协作,避免浪费与延误。
Uncertainty-Aware Multi-Robot Task Allocation With Strongly Coupled Inter-Robot Rewards
- 用拍卖机制分配任务,考虑任务需求不确定性,让潜在需要的机器人靠近不确定任务。
- 模拟灾害救援显示,任务完成率提升15%,比盲目冗余分配更优。
- 利用环境变化确认延迟来建模未知风险,适合复杂动态场景中的多机器人系统。
在任务需求不确定的环境中为异构机器人团队分配任务是一个根本性挑战。过度冗余地分配多个机器人会过于保守,而完全被动的策略则可能在必要时能力不足导致任务完成延迟。本文提出一种基于拍卖的任务分配算法,显式建模任务需求的不确定性,通过一种新型强耦合机制,使可能需要额外能力的机器人自然靠近不确定任务。该方法使机器人能在附近持续执行任务的同时,在其能力被需要时显著减少完成延迟。在带有任务截止时间约束的模拟灾害救援任务中,实验表明,该方法相比冗余分配方法可提升高达15%的预期任务价值。此外,我们提出一种新框架,利用遇到意外环境条件到确认是否需要额外能力之间的自然延迟,来近似未建模的任务需求变化。结果表明,相较于不利用该延迟的反应式方法,本方法可实现高达18%的预期任务价值提升。
原文摘要 · Abstract (English)
Allocating tasks to heterogeneous robot teams in environments with uncertain task requirements is a fundamentally challenging problem. Redundantly assigning multiple robots to such tasks is overly conservative, while purely reactive strategies risk costly delays in task completion when the uncertain capabilities become necessary. This paper introduces an auction-based task allocation algorithm that explicitly models task requirement uncertainty, leveraging a novel strongly coupled formulation to allocate tasks such that robots with potentially required capabilities are naturally positioned near uncertain tasks. This approach enables robots to remain productive on nearby tasks while simultaneously mitigating large delays in completion time when their capabilities are required. Through a set of simulated disaster relief missions with task deadline constraints, we demonstrate that the proposed approach yields up to a 15% increase in expected mission value compared to redundancy-based methods. Furthermore, we propose a novel framework to approximate uncertainty arising from unmodeled changes in task requirements by leveraging the natural delay between encountering unexpected environmental conditions and confirming whether additional capabilities are required to complete a task. We show that our approach achieves up to an 18% increase in expected mission value using this framework compared to reactive methods that do not leverage this delay.
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