arXiv:2502.01041cs.RO2025-02被引 1

多智能体在动态未知环境中高效搜索追踪目标,提升响应与协同效率。

Multi-Object Active Search and Tracking by Multiple Agents in Untrusted, Dynamically Changing Environments

  • 引入时变信念表示,融合可信度不同的外部报告与多源信息。
  • 结合LSTM轨迹预测实现长时程决策,任务完成速度提升1.3至3.2倍。
  • 支持异构多智能体协同,适合复杂真实场景如海洋监测应用。

本文研究在已知但部分可观测的动态环境中,多个协作自主智能体对多个未知动态目标进行主动搜索与追踪的问题。当目标不确定性低于阈值时追踪结束。现有方法通常假设同质智能体且无外部信息输入,依赖短时预测模型,限制实际应用。本文提出一个全集成系统:(1) 设计时变加权信念表示,可处理随时间变化的知识,包含不同可信度的外部报告;(2) 在优化框架中嵌入基于长短期记忆(LSTM)的轨迹预测,于时空配置空间推理,增强响应能力;(3) 构建支持多智能体的信息驱动优化系统。通信可用时,总部整合异步收集的探索结果及外部信息,按全局效用最优分配任务。在仿真中广泛对比基线,并开展鲁棒性与消融实验;还使用3D物理引擎机器人模拟器及海洋学流体动力学模拟的真实轨迹验证可行性。结果表明,本方法在最严峻场景下(目标数为智能体数的5倍)仍能将任务完成时间缩短1.3至3.2倍。

原文摘要 · Abstract (English)

This paper addresses the problem of both actively searching and tracking multiple unknown dynamic objects in a known environment with multiple cooperative autonomous agents with partial observability. The tracking of a target ends when the uncertainty is below a threshold. Current methods typically assume homogeneous agents without access to external information and utilize short-horizon target predictive models. Such assumptions limit real-world applications. We propose a fully integrated pipeline where the main contributions are: (1) a time-varying weighted belief representation capable of handling knowledge that changes over time, which includes external reports of varying levels of trustworthiness in addition to the agents; (2) the integration of a Long Short Term Memory-based trajectory prediction within the optimization framework for long-horizon decision-making, which reasons in time-configuration space, thus increasing responsiveness; and (3) a comprehensive system that accounts for multiple agents and enables information-driven optimization. When communication is available, our strategy consolidates exploration results collected asynchronously by agents and external sources into a headquarters, who can allocate each agent to maximize the overall team's utility, using all available information. We tested our approach extensively in simulations against baselines, and in robustness and ablation studies. In addition, we performed experiments in a 3D physics based engine robot simulator to test the applicability in the real world, as well as with real-world trajectories obtained from an oceanography computational fluid dynamics simulator. Results show the effectiveness of our method, which achieves mission completion times 1.3 to 3.2 times faster in finding all targets, even under the most challenging scenarios where the number of targets is 5 times greater than that of the agents.

多智能体目标追踪长时预测协同搜索

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