An Adaptive Vision-based Approach to Decentralized Formation Control

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Date
2004-08Author
Sattigeri, Ramachandra J.
Calise, Anthony J.
Evers, Johnny H.
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Show full item recordAbstract
In considering the problem of formation control in the deployment of intelligent
munitions, it would be highly desirable, both from a mission and a cost perspective, to limit
the information that is transmitted between vehicles in formation. In a previous paper, we
proposed an adaptive output feedback approach to address this problem. Adaptive
formation controllers were designed that allow each vehicle in formation to maintain
separation and relative orientation with respect to neighboring vehicles, while avoiding
obstacles. In this paper, we consider a modification to the adaptive control law that enables
each vehicle in a leader-follower formation to track line-of-sight (LOS) range with respect to two or more neighboring vehicles with zero steady-state error. We also propose a
coordination scheme in which each vehicle tracks LOS range to up to two nearest vehicles
while simultaneously navigating towards a common set of waypoints. This coordination
scheme does not require a unique leader for the formation, increasing robustness of the
formation. As our results show, such leaderless formations can perform maneuvers like
splitting to go around obstacles, rejoining after negotiating the obstacles, and changing into
line-shaped formation in order to move through narrow corridors.