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Distributed control of multiple non-holonomic robots with sector vision and range-only measurements for target capturing with collision avoidance

Published online by Cambridge University Press:  03 March 2014

A. Zakhar'eva
Affiliation:
Department of Mathematics and Mechanics, St Petersburg University, St Petersburg, Russia
A. S. Matveev
Affiliation:
Department of Mathematics and Mechanics, St Petersburg University, St Petersburg, Russia
M. C. Hoy*
Affiliation:
School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales, Australia
A. V. Savkin
Affiliation:
School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, New South Wales, Australia
*
*Corresponding author. E-mail: mch.hoy@gmail.com
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We consider a team of autonomous kinematically controlled non-holonomic planar Dubins car-like vehicles. The team objective is to encircle a given target so that all vehicles achieve a common and pre-specified distance from it and are uniformly distributed over the respective circle, and the entire formation rotates around the target with a prescribed angular velocity. The robots do not communicate with each other and any central decision-maker. The sensing capacity of any vehicle is heavily restricted: It has access only to the distance to the target and to the distances to the companion vehicles that are in a given disc sector centered at the vehicle at hand; no robot can distinguish between its companions, and does not know their parameters. A distributed control law is proposed, and mathematically rigorous proofs of its non-local convergence as well as collision avoidance property are presented. The performance of the control law is illustrated by computer simulations and experiments with real robots.

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Articles
Copyright
Copyright © Cambridge University Press 2014