Distributed Stopping Criterion for Consensus in the Presence of Delays

Mangal Prakash, Saurav Talukdar, Sandeep Attree, Vikas Yadav, Murti V. Salapaka

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Linear consensus protocol is an iterative distributed algorithm with asymptotic convergence guarantees. This paper develops and analyzes an algorithm for agents running linear consensus iterations to detect convergence to consensus within a specified error tolerance in a distributed manner. The distributed stopping criterion allows for time-varying bounded delays in information transmission and reception between agents. The algorithm relies on distributively determining the maximum and minimum values held by the agents. This paper further develops an algorithm for average consensus that utilizes a distributive stopping criterion, based on maximum and minimum consensus, where no centralized coordination is needed on how each agent weights its neighbor's values. Here, the doubly stochastic assumption on the weight matrix is relaxed and only column stochasticity is needed. The effectiveness of the algorithms is demonstrated by simulations and a comparison with prior work in the literature. Moreover, the demonstration of the proposed algorithms on an experimental test bed of Raspberry-Pi agents communicating wirelessly validates its applicability and utility.

Original languageEnglish (US)
Article number8715396
Pages (from-to)85-95
Number of pages11
JournalIEEE Transactions on Control of Network Systems
Volume7
Issue number1
DOIs
StatePublished - Mar 2020

Bibliographical note

Funding Information:
Manuscript received November 25, 2018; revised December 2, 2018 and March 18, 2019; accepted May 2, 2019. Date of publication May 15, 2019; date of current version March 18, 2020. This work was supported by Advanced Research projects Agency-Energy (ARPA-E) Award DE-AR0000701. Recommended by Associate Editor L. Shi. (Mangal Prakash and Saurav Talukdar contributed equally to this work.) (Corresponding author: Murti V. Salapaka.) M. Prakash, S. Attree, and M. V. Salapaka are with the Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA (e-mail:,praka027@umn.edu; attre002@umn. edu; murtis@umn.edu).

Keywords

  • Approximate consensus
  • average consensus with delays
  • consensus with delays
  • maximum consensus
  • minimum consensus

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