Effective Approximations for Multi-Robot Coordination in Spatially Distributed Tasks



Claes, Daniel, Robbel, Philipp, Oliehoek, Frans A ORCID: 0000-0003-4372-5055, Tuyls, Karl, Hennes, Daniel and van der Hoek, Wiebe
(2015) Effective Approximations for Multi-Robot Coordination in Spatially Distributed Tasks. In: Proceedings of the 2015 International Conference on Autonomous Agents and Multiagent Systems, Istanbul, Turkey.

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Abstract

Although multi-robot systems have received substantial research attention in recent years, multi-robot coordination still remains a difficult task. Especially, when dealing with spatially distributed tasks and many robots, central control quickly becomes infeasible due to the exponential explosion in the number of joint actions and states. We propose a general algorithm that allows for distributed control, that overcomes the exponential growth in the number of joint actions by aggregating the effect of other agents in the system into a probabilistic model, called subjective approximations, and then choosing the best response. We show for a multi-robot grid world how the algorithm can be implemented in the well studied Multiagent Markov Decision Process framework, as a sub-class called spatial task allocation problems (SPAT-APs). In this framework, we show how to tackle SPATAPs using online, distributed planning by combining subjective agent approximations with restriction of attention to current tasks in the world. An empirical evaluation shows that the combination of both strategies allows to scale to very large problems, while providing near-optimal solutions.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Robotics, Robot Planning and Plan execution, Robot Teams, Multi-Robot Systems, Robot Coordination
Subjects: ?? QA75 ??
Depositing User: Symplectic Admin
Date Deposited: 26 Nov 2015 09:05
Last Modified: 16 Dec 2022 06:46
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/2032359