Fault-tolerant rendezvous of multirobot systems

Hyongju Park, Seth A. Hutchinson

Research output: Contribution to journalArticle

Abstract

In this paper, we propose a distributed control policy to achieve rendezvous by a set of robots even when some robots in the system do not follow the prescribed policy. These nonconforming robots correspond to faults in the multirobot system, and our control policy is thus a fault-tolerant policy. Each robot has a limited sensing range and is able to directly estimate the state of only those robots within that sensing range, which induces a network topology for the multirobot system. We assume that it is not possible for the fault-free robots to identify the faulty robots, and thus our approach is robust even to undetected faults in the system. The main contribution of this paper is a fault-tolerant distributed control algorithm that is guaranteed to converge to consensus under certain reasonable connectivity conditions. We first present a general algorithm that exploits the notion of a Tverberg partition of a point set in Rd, and give a proof of convergence. We then provide three instantiations of this algorithm, based on three different sensing models. For each case, we analyze performance via extensive simulations. The effectiveness and performance of our algorithms on real platforms are demonstrated through experiments on a multirobot testbed.

Original languageEnglish (US)
Article number7867756
Pages (from-to)565-582
Number of pages18
JournalIEEE Transactions on Robotics
Volume33
Issue number3
DOIs
StatePublished - Jun 2017

Keywords

  • Decentralized control
  • Distributed control
  • Distributed rendezvous
  • Fault-tolerant consensus
  • Tverberg partition

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Fault-tolerant rendezvous of multirobot systems'. Together they form a unique fingerprint.

  • Cite this