In this paper, we consider cooperative control issues for a multi-unmanned aerial vehicle (UAV) system. We propose a cooperative formation control strategy with unidirectional network connections between UAVs. Our strategy is to apply a consensus-based algorithm to the UAVs so that they can cooperatively fly in formation. First, we show that UAV models on the horizontal plane and in the vertical direction are expressed as a fourth- and second-order system, respectively. Then, we show that the stability discriminants of the multi-UAV system on the horizontal plane and in the vertical direction are expressed as polynomials. For a network structure composed of bidirectional or unidirectional network connections under the assumption that the network has a directed spanning tree, we provide conditions for formation control gains such that all roots of the polynomials have negative real parts in order for the UAVs to asymptotically converge to the positions for a desired formation by using the generalized Routh stability criterion. The proposed control algorithms are validated through simulations, and experiments are performed on multiple commercial small UAVs to validate the proposed control algorithm.
Consensus-Based Cooperative Formation Control for Multiquadcopter System With Unidirectional Network Connections
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received May 2, 2016; final manuscript received October 19, 2017; published online December 14, 2017. Assoc. Editor: Dejan Milutinovic.
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Namerikawa, T., Kuriki, Y., and Khalifa, A. (December 14, 2017). "Consensus-Based Cooperative Formation Control for Multiquadcopter System With Unidirectional Network Connections." ASME. J. Dyn. Sys., Meas., Control. April 2018; 140(4): 044502. https://doi.org/10.1115/1.4038375
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