Multi-robot teleoperation under dynamically changing network topology

Ugur Tumerdem, Kouhei Ohnishi

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

4 Citations (Scopus)

Abstract

The goal of this research is to realize robust teleoperation with multiple telerobots under changing communication topologies. In haptic teleoperation with multiple operators and multiple robots the forces as well as the positions should be transmitted between all the robots, which introduces difficulties in maintaining the stability and the efficiency of the system under communication failures or time delays on certain paths. In our research, we relax the constraints on the control system by approaching the multilateral teleoperation problem by using information graphs and consensus algorithms. We first show how decentralized multilateral teleoperation can be realized by using consensus filters. The haptic consensus algorithm which employs consensus filters is shown to be effective even on dynamically changing network topologies, as long as the network structure is connected and balanced. Furthermore we show that using haptic consensus algorithm it is possible to realize a bilateral teleoperation system for cooperative load carrying. Experiment results show that the haptic consensus algorithm enables multilateral teleoperation as well as bilateral multirobot cooperative teleoperation even on switching network topologies where the network topology is changing every control sampling time, which in our case is 100 microseconds. This means that the control system is very flexible, and tolerant against communication failures.

Original languageEnglish
Title of host publication2009 IEEE International Conference on Industrial Technology, ICIT 2009
DOIs
Publication statusPublished - 2009 Jul 17
Event2009 IEEE International Conference on Industrial Technology, ICIT 2009 - Churchill, VIC, Australia
Duration: 2009 Feb 102009 Feb 13

Publication series

NameProceedings of the IEEE International Conference on Industrial Technology

Other

Other2009 IEEE International Conference on Industrial Technology, ICIT 2009
CountryAustralia
CityChurchill, VIC
Period09/2/1009/2/13

Keywords

  • Consensus algorithms
  • Fault tolerant control
  • Haptic teleoperation
  • Networked control

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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