arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.09382cs.RO
收藏

存在通信延迟的多机器人系统安全分布式控制

Safe Distributed Control of Multi-Robot Systems with Communication Delays

Delft Center for Systems and Control (DCSC), Delft University of Technology(代尔夫特系统与控制中心(DCSC),代尔夫特理工大学);Laboratory for Information and Decision Systems (LIDS), Massachusetts Institute of Technology(信息与决策系统实验室(LIDS),麻省理工学院)

Luca Ballotta, Rajat Talak

AI总结:

针对通信延迟下多机器人系统的安全运行问题,提出分布式控制屏障函数概念与基于预测器的训练框架,通过图神经网络学习安全控制器,显著提升了延迟环境下的避障安全性。

摘要:

多机器人系统的安全运行至关重要,尤其是在通信受限的环境中,例如用于海床测绘的水下环境、用于导航的地下洞穴环境,以及用于组装与建造的地外任务环境。我们研究网络化自主系统的安全性问题,这类系统中机器人之间交换的信息会产生通信延迟。我们形式化定义了多机器人系统的分布式控制屏障函数概念,这是一种适用于分布式实现的安全证书,为使用图神经网络学习安全分布式控制器提供了形式化基础。此外,我们发现忽略延迟学习分布式控制器会严重降低安全性。最后,我们提出了一种基于预测器的框架,用于在通信延迟下训练安全分布式控制器,该框架根据接收到的数据和信息年龄预测附近机器人的当前状态。在多机器人避障任务上的数值实验表明,我们的基于预测器的方法能显著提升通信延迟下学习得到的分布式控制器的安全性。视频摘要见:https://youtu.be/Hcu1Ri32Spk。

英文摘要:

Safe operation of multi-robot systems is critical, especially in communication-degraded environments such as underwater for seabed mapping, underground caves for navigation, and in extraterrestrial missions for assembly and construction. We address safety of networked autonomous systems where the information exchanged between robots incurs communication delays. We formalize a notion of distributed control barrier function for multi-robot systems, a safety certificate amenable to a distributed implementation, which provides formal ground to using graph neural networks to learn safe distributed controllers. Further, we observe that learning a distributed controller ignoring delays can severely degrade safety. We finally propose a predictor-based framework to train a safe distributed controller under communication delays, where the current state of nearby robots is predicted from received data and age-of-information. Numerical experiments on multi-robot collision avoidance show that our predictor-based approach can significantly improve the safety of a learned distributed controller under communication delays. A video abstract is available at https://youtu.be/Hcu1Ri32Spk.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑