Abstract
A dynamic model of the underwater vehicle is usually established with parameters uncertainties due to the non-linear and time-varying nature of hydrodynamic forces from the surrounding fluid and external environmental disturbances. The paper investigates the motion control problem of the vehicle in tridimensional space based on model reference adaptive control. A developed autopilot consists of three independent controllers with a parameter adaptation law implemented. A control performance is guaranteed by suitably choosing design parameters. The effectiveness and robustness of the proposed control scheme for trajectory tracking in surge, depth and yaw dynamics is tested through simulations studies.
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