The paper addresses the problem of autonomous underwater vehicle (AUV) control in the absence of full state information. An application is made to the control of a prototype AUV in the vertical plane. The methodology adopted for controller design is nonlinear gain scheduling control, whereby a set of linear, dynamic reduced order output feedback controllers are designed and scheduled on the veh...

Present study presents a novel region boundary-based tracking control for an Autonomous Underwater Vehicle (AUV). The control objective is to track a moving target formed by the union of all boundaries. In this case, multiplicative potential energy function is used to unite all the boundaries and various shapes can be created using this function. It is interesting to note that the AUV will be p...

An Autonomous Underwater Vehicle refuel station is proposed. The power source is located on board a surface vessel, while the AUV is serviced at depth. The structure which connects the two craft is modelled as a cable-beam. Transverse oscillations of this cable-beam system are investigated through a fourth-order differential equation.

A powerful adaptive filter algorithm for estimation of forces acting on an Autonomous Underwater Vehicle (AUV), and the corresponding adaptive control law which determines the desired heading commands are considered in this paper. Due to the complicated nature of AUV’s task and incorporation of the ocean current, uncertain parameters arise in thc equations of motion that constitute the AUV’s dy...

This paper briefly introduces a strategy for autonomous homing and docking tasks using an autonomous underwater vehicle. The control and guidance based path following for those tasks are described in this work. A standard sliding mode for controller design is briefly given. The method provides robust motion control efforts for an underwater vehicle’s decoupled system whilst minimising chatterin...

This study is related to the obstacle avoidance issue for an Autonomous Underwater Vehicle (AUV). In addition to its original mission, the vehicle must ensure its own survival and therefore understand the environment in safety. The use of a Forward Looking Sonar (FLS) on AUV is one of the most efficient solutions to detect unexpected and potentially dangerous changes of the environment, like th...

This paper treats the practical and challenging control problem of tracking a prescribed continuous trajectory for an autonomous vehicle in the presence of gravity, buoyancy, fluid dynamic and other forces and moments that are uncertain. These uncertain forces and moments are bounded and may be difficult to model accurately, but they act persistently or over long periods of time. The trajectory...

This paper introduces a new kinematic model to describe the planar motion of an Autonomous Underwater Vehicle (AUV) moving in constant current flows. The AUV is modeled as a rigid body moving at maximum attainable forward velocity with symmetric bounds on the control input for the turning rate. The model incorporates the effect a flow will induce on the turning rate of the AUV due to the non-sy...

This paper presents an adaptive nonlinear controller for diving control of an autonomous underwater vehicle (AUV). So far, diving dynamics of an AUV has often been derived under various assumptions on the motion of the vehicle. Typically, the pitch angle of AUV has been assumed to be small in the diving plane. However, these kinds of assumptions may induce large modeling errors and further may ...

In this study, the roll, yaw and depth fuzzy control of an Autonomous Underwater Vehicle (AUV) are addressed. Yaw and roll angles are regulated only using their errors and rates, but due to the complexity of depth dynamic channel, additional pitch rate quantity is used to improve the depth loop performance. The discussed AUV has four flaps at the rear of the vehicle as actuators. Two rule bases...