多机器人系统在计算延迟下仍能高效协同学习与控制。
Asynchronous Cooperative Online Learning for Multi-Robot Control under Computational Delays
- 异步协作学习,考虑预测精度与查询点差异
- 相比现有方法,学习和控制性能显著提升
- 适合有计算延迟的多机器人协同场景
在不确定环境下保障多智能体系统(MASs)的安全运行对协同机器人至关重要,外部干扰和动态模型不准确会严重影响性能与可靠性。为此,可解释性强的高斯过程(GP)回归被广泛用于机器学习建模。通过多智能体间通信实现协同学习,各智能体可交换本地GP推断,并通过分布式GP策略聚合信息以提升学习效果。然而,智能体间计算能力差异与任务不同导致计算延迟异质性及查询点差异,现有聚合方法常忽视这些问题。本文提出一种显式考虑预测精度、查询点变化与延迟影响的异步协同学习策略,并设计基于伴随多智能体系统的分布式控制律,确保期望控制性能。在无人水面艇上的仿真验证了该方法的有效性,相比最先进方法,学习与控制性能均有显著提升。
原文摘要 · Abstract (English)
Ensuring the safe operation of multi-agent systems (MASs) under uncertain environments is crucial for cooperative robotic, where external disturbances and inaccurate dynamic models can significantly compromise performance and reliability. To address this challenge, calibrated machine learning models, particularly Gaussian process (GP) regression, are extensively employed due to their interpretable performance quantification. As the interconnected communication of MASs facilitates cooperative learning, agents are able to enhance learning performance by exchanging local GP inferences with their neighbors and aggregating the received information via distributed GP strategies. However, variations in computational power and prediction tasks among agents inevitably lead to heterogeneous computational delays and differences in query points, which are often overlooked in existing aggregation methods. To overcome these limitations, this work proposes an asynchronous cooperative learning strategy that explicitly accounts for prediction accuracy, query point variations and delay effects. Additionally, a distributed control law based on an adjoint MAS is developed to ensure the desired control performance. Simulations on unmanned surface vehicles validate the effectiveness of the proposed approach, demonstrating substantial improvements in both learning and control performance compared to the state-of-the-art approaches.
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