Beyond Joint Demonstrations: Personalized Expert Guidance for Efficient Multi-Agent Reinforcement Learning
作者: Peihong Yu, Manav Mishra, Alec Koppel, Carl Busart, Priya Narayan, Dinesh Manocha, Amrit Bedi, Pratap Tokekar
分类: cs.MA, cs.AI, cs.RO
发布日期: 2024-03-13 (更新: 2025-01-04)
备注: accepted in Transactions on Machine Learning Research
💡 一句话要点
提出个性化专家指导以解决多智能体强化学习中的探索效率问题
🎯 匹配领域: 支柱二:RL算法与架构 (RL & Architecture)
关键词: 多智能体强化学习 个性化专家演示 合作学习 强化学习算法 智能体系统
📋 核心要点
- 现有的多智能体强化学习方法在探索效率上存在显著挑战,尤其是在联合状态-动作空间迅速扩大的情况下。
- 本文提出个性化专家指导的MARL方法(PegMARL),通过单智能体演示来引导每个智能体的学习过程,促进合作。
- 实验结果显示,PegMARL在离散和连续环境中均优于现有最先进的MARL算法,尤其在协调任务中表现突出。
📝 摘要(中文)
多智能体强化学习(MARL)算法面临由于联合状态-动作空间的指数级增长而导致的高效探索挑战。尽管演示指导学习在单智能体环境中表现良好,但在MARL中直接应用受到获取联合专家演示的实际困难限制。本文引入个性化专家演示的概念,针对每个智能体或异构团队中的每种智能体类型进行定制。这些演示仅涉及单智能体行为,帮助每个智能体实现个人目标,而不包含任何合作元素。为此,我们提出了一种选择性利用个性化专家演示的指导方法,允许智能体学习合作,即个性化专家指导的MARL(PegMARL)。实验结果表明,PegMARL在解决协调任务时优于现有的MARL算法,即使在提供次优个性化演示的情况下也能取得良好表现。
🔬 方法详解
问题定义:本文旨在解决多智能体强化学习中由于联合状态-动作空间的复杂性导致的探索效率低下问题。现有方法在获取联合专家演示时面临实际困难,限制了其在MARL中的应用。
核心思路:论文提出个性化专家演示的概念,专注于单个智能体的行为,允许智能体在没有合作元素的情况下实现个人目标,从而促进智能体之间的合作学习。
技术框架:PegMARL算法包括两个主要模块:第一个鉴别器根据智能体行为与专家演示的一致性提供激励,第二个鉴别器则根据行为是否导致期望结果来调节激励。
关键创新:最重要的创新在于引入个性化专家演示,允许每个智能体独立学习,同时通过设计两个鉴别器来平衡个体行为与合作目标的关系,这与传统的联合演示方法有本质区别。
关键设计:在PegMARL中,损失函数设计考虑了行为一致性和结果导向,网络结构则通过两个鉴别器的交互来优化智能体的学习过程,确保其能够有效地学习合作。
🖼️ 关键图片
📊 实验亮点
实验结果表明,PegMARL在协调任务中表现优于现有最先进的MARL算法,尤其在提供次优个性化演示的情况下,仍能实现显著的性能提升,具体表现为在多个环境中均取得了更高的成功率和更快的收敛速度。
🎯 应用场景
该研究的潜在应用领域包括多智能体系统的协作任务,如无人机编队、机器人团队协作和智能交通系统等。通过个性化专家指导,能够提高智能体在复杂环境中的学习效率和合作能力,具有重要的实际价值和未来影响。
📄 摘要(原文)
Multi-Agent Reinforcement Learning (MARL) algorithms face the challenge of efficient exploration due to the exponential increase in the size of the joint state-action space. While demonstration-guided learning has proven beneficial in single-agent settings, its direct applicability to MARL is hindered by the practical difficulty of obtaining joint expert demonstrations. In this work, we introduce a novel concept of personalized expert demonstrations, tailored for each individual agent or, more broadly, each individual type of agent within a heterogeneous team. These demonstrations solely pertain to single-agent behaviors and how each agent can achieve personal goals without encompassing any cooperative elements, thus naively imitating them will not achieve cooperation due to potential conflicts. To this end, we propose an approach that selectively utilizes personalized expert demonstrations as guidance and allows agents to learn to cooperate, namely personalized expert-guided MARL (PegMARL). This algorithm utilizes two discriminators: the first provides incentives based on the alignment of individual agent behavior with demonstrations, and the second regulates incentives based on whether the behaviors lead to the desired outcome. We evaluate PegMARL using personalized demonstrations in both discrete and continuous environments. The experimental results demonstrate that PegMARL outperforms state-of-the-art MARL algorithms in solving coordinated tasks, achieving strong performance even when provided with suboptimal personalized demonstrations. We also showcase PegMARL's capability of leveraging joint demonstrations in the StarCraft scenario and converging effectively even with demonstrations from non-co-trained policies.