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Coordinated Formation Control of Multiple Autonomous Underwater Vehicles for Pipeline Inspection

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Author(s): Xianbo Xiang | Bruno Jouvencel | Olivier Parodi

Journal: International Journal of Advanced Robotic Systems
ISSN 1729-8806

Volume: 7;
Issue: 1;
Date: 2010;
Original page

Keywords: autonomous underwater vehicle | pipeline inspection | path following | leader-follower | coordinated formation control

ABSTRACT
This paper addresses the control problem of inspecting underwater pipeline on the seabed, with coordinated multiple autonomous underwater vehicles in a formation. Based on the leader-follower strategy, the dedicated nonlinear path following controller is rigorously built on Lyapunov-based design, driving a fleet of vehicles onto assigned parallel paths elevated and offset from the underwater pipeline, while keeping a triangle formation to capture complete 3D images for inspection. Due to the spatial-temporal decoupling characteristics of individual path following controller, the velocities of the followers can be adapted in the coordinated control level, only relying on the information of generalized along-path length from the leader, in order to build the desired formation. Thus, the communication variable broadcast from the leader is kept to a minimum, which is feasible under the severely constraints of acoustic communication bandwidth. Simulation results illustrate the efficiency of coordinated formation controller proposed for underwater pipeline inspection.
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