Distributed control of angle-constrained circular formations using bearing-only measurements

This paper studies distributed formation control of multiple agents in the plane using bearing-only measurements. It is assumed that each agent only measures the local bearings of their neighbor agents. The target formation considered in this paper is a circular formation, where each agent has exactly two neighbors. In the target formation, the angle subtended at each agent by their two neighbors is specified. We propose a distributed control law that stabilizes angle-constrained target formations merely using local bearing measurements. The stability of the target formation is analyzed based on Lyapunov approaches. We present a unified proof to show that the proposed control law can ensure local exponential or finite-time stability. The exponential or finite-time stability can be easily switched by tuning a parameter in the control law.

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