多机器人系统通过学习人类偏好实时调整行为,提升户外环境适应能力。
Reactive Multi-Robot Navigation in Outdoor Environments Through Uncertainty-Aware Active Learning of Human Preference Landscape
- 结合人类实时反馈,用稀疏变分高斯过程建模环境偏好空间。
- 20名用户1764次反馈下,偏好预测准确且行为调整速度快。
- 适合需要人机协作的复杂户外任务场景,如灾害搜救。
与单机器人相比,多机器人系统(MRS)因成员多样、能力互补,能更高效完成任务。然而,在真实广阔环境中部署仍具挑战,主要源于障碍物不确定性(如建筑群、树木)及对环境不确定性的理解不足,导致系统无法灵活调整协同策略、负载分配和路径规划,难以兼顾环境适应与任务完成。本文提出一种新型联合偏好空间学习与行为自适应框架(PLBA)。该框架高效融合实时人类指导,利用带可变输出噪声的稀疏变分高斯过程,通过环境特征的空间相关性快速评估人类偏好。随后,基于优化的方法安全调整多机器人行为以适配环境。为验证有效性,设计了洪水灾害搜救任务,20名用户提供了1764条关于“任务质量”、“任务进展”、“机器人安全”的偏好反馈。结果表明,该方法在偏好学习与行为自适应方面均表现优异。
原文摘要 · Abstract (English)
Compared with single robots, Multi-Robot Systems (MRS) can perform missions more efficiently due to the presence of multiple members with diverse capabilities. However, deploying an MRS in wide real-world environments is still challenging due to uncertain and various obstacles (e.g., building clusters and trees). With a limited understanding of environmental uncertainty on performance, an MRS cannot flexibly adjust its behaviors (e.g., teaming, load sharing, trajectory planning) to ensure both environment adaptation and task accomplishments. In this work, a novel joint preference landscape learning and behavior adjusting framework (PLBA) is designed. PLBA efficiently integrates real-time human guidance to MRS coordination and utilizes Sparse Variational Gaussian Processes with Varying Output Noise to quickly assess human preferences by leveraging spatial correlations between environment characteristics. An optimization-based behavior-adjusting method then safely adapts MRS behaviors to environments. To validate PLBA's effectiveness in MRS behavior adaption, a flood disaster search and rescue task was designed. 20 human users provided 1764 feedback based on human preferences obtained from MRS behaviors related to "task quality", "task progress", "robot safety". The prediction accuracy and adaptation speed results show the effectiveness of PLBA in preference learning and MRS behavior adaption.
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