In this paper we propose a fault/failure tolerant control scheme for a catamaran with two azimuth thrusters. The scheme is based on a three level architecture: a heuristic-based control policy for proper reference generation, a control law for the vehicle dynamics to achieve speed tracking of the generated reference, and a control allocation level for optimally redistributing the control efforts among the thrusters even in presence of actuator faults and failures; finally, the low level control is invariant with respect to the fault/failure scenario, as well as the control law. The proposed architecture has been simulated considering the nonlinear model of a Wave Adaptive Modular Vessel catamaran, with the aim of tracking a reference expressed in waypoints, even when faults/failures affect one or more thrusters.
Fault Tolerant Control for an Over-Actuated WAM-V Catamaran / Baldini, A.; Felicetti, R.; Freddi, A.; Hasegawa, K.; Monteriu, A.; Pandey, J.. - 52:(2019), pp. 353-359. (Intervento presentato al convegno 12th IFAC Conference on Control Applications in Marine Systems, Robotics, and Vehicles CAMS 2019 tenutosi a Daejeon, Korea nel 2019) [10.1016/j.ifacol.2019.12.332].