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In this paper, a novel point-to-point motion controller is proposed for an underwater vehicle. Within this control concept, an edge-based segmentation approach is utilized to facilitate the problem that is associated with the region boundary-based control technique. The stability of the presented control law is proven in the sense of Lyapunov. Simulations on a 6-DOF underwater vehicle are carried...
In this paper, a simple control approach based on a region boundary technique for geometric formation of multiple Autonomous Underwater Vehicles (AUVs) is presented. The control objective is to keep each underwater vehicle at each corner of a desired geometric shape, i.e. an equilateral triangle or a square. An edge-based segmentation approach is utilized rather than specifying the minimum distance...
This study presents a novel tracking control scheme for an underwater vehicle-manipulator system (UVMS) where the proposed controller is not only used to track the prescribed sub-region but also allows the use of the self-motion to perform various sub-tasks (i.e. drag minimisation, obstacle avoidance and manipulability) because of the kinematically redundant system. In the proposed control scheme,...
A new control concept is proposed for an autonomous underwater vehicle (AUV) where the desired target is defined as a boundary rather than a point or a region. The inverse Jacobian is utilized in the adaptive control law for compensation of the persistent effects i.e.: the restoring forces. The unit quaternion representation is used for the AUVs attitude representation. The stability analysis is carried...
A new control concept is proposed for an underwater vehicle-manipulator system (UVMS) where the desired target is defined as a region boundary rather than a point or a region. For a mapping of the uncertain persistent effects i.e.: the restoring forces, a least-squares estimation algorithm along with the inverse Jacobian matrix is utilized in the adaptive control law. The unit quaternion representation...
In this paper, a sub-region tracking control scheme is proposed for an Underwater Vehicle-Manipulator System (UVMS). In the proposed controller, the desired primary task of the UVMS is specified as two sub-regions that are assigned for the vehicle and end-effector. The unit quaternion representation is utilized to achieve singularity-free attitude tracking control. In addition, due to the kinematically...
This paper presents an adaptive sub-region priority reaching controller with a fuzzy logic algorithm for an underwater vehicle. In this method, the sub-region priority reaching control law is merged with a fuzzy technique to manage the generalization of the underwater vehicle set-point control problem. The fuzzy technique is used to handle multiple sub-region criteria. These criteria are: depth constraint,...
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