Probabilistic Swarm Guidance Subject to Graph Temporal Logic Specifications

Franck Djeumou, Zhe Xu, Ufuk Topcu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

As the number of agents comprising a swarm increases, individual-agent-based control techniques for collective task completion become computationally intractable. We study a setting in which the agents move along the nodes of a graph, and the high-level task specifications for the swarm are expressed in a recently proposed language called graph temporal logic (GTL). By constraining the distribution of the swarm over the nodes of the graph, GTL specifies a wide range of properties, including safety, progress, and response. In contrast to the individual-agent-based control techniques, we develop an algorithm to control, in a decentralized and probabilistic manner, a collective property of the swarm: its density distribution. The algorithm, agnostic to the number of agents in the swarm, synthesizes a time-varying Markov chain modeling the time evolution of the density distribution of a swarm subject to GTL. We first formulate the synthesis of such a Markov chain as a mixed-integer nonlinear program (MINLP). Then, to address the intractability of MINLPs, we present an iterative scheme alternating between two relaxations of the MINLP: a linear program and a mixed-integer linear program. We evaluate the algorithm in several scenarios, including a rescue mission in a high-fidelity ROS-Gazebo simulation1 .

Original languageEnglish (US)
Title of host publicationRobotics
Subtitle of host publicationScience and Systems XVI
EditorsMarc Toussaint, Antonio Bicchi, Tucker Hermans
PublisherMIT Press Journals
ISBN (Print)9780992374761
DOIs
StatePublished - 2020
Externally publishedYes
Event16th Robotics: Science and Systems, RSS 2020 - Virtual, Online
Duration: Jul 12 2020Jul 16 2020

Publication series

NameRobotics: Science and Systems
ISSN (Electronic)2330-765X

Conference

Conference16th Robotics: Science and Systems, RSS 2020
CityVirtual, Online
Period7/12/207/16/20

ASJC Scopus subject areas

  • Artificial Intelligence
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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