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This paper presents a robust-saved energy control and obstacles avoidance technique for an Autonomous Underwater Vehicle (AUV). A super twisting sliding mode which consists of discontinues and continuous function is engaged as a robust control. A discontinuous function is useful to switch between two different systems; thus, the disturbance's effect can be minimized. However, it is resulting a high-infinite...
Intelligent control of an autonomous underwater vehicle (AUV) requires a control scheme which is robust to external perturbations. These perturbations are highly uncertain and can prevent the AUV from accomplishing its mission. A well-known robust control called sliding mode control (SMC) and its development have been introduced. However, it produces a chattering effect which requires more energy...
This paper presents a new technique to control a hovering Autonomous Underwater Vehicle (AUV) mounted with four horizontal and four vertical thrusters. In this control scheme, fault tolerant decomposition and region based control schemes for tracking purposes are used. A Lyapunov-like function is presented for convergence analysis of the proposed control law. Based on numerical simulations, the performance...
This paper presents a new adaptive region boundary-based tracking control for an Autonomous Underwater Vehicle (AUV). The proposed controller enables an AUV to track a moving target formed by the union of two or more boundaries. In this case, multiplicative potential energy function is used to unite the entire boundaries. The AUV also navigates into a specific position on the boundary lines or surfaces...
This paper addresses the generalized set-point and region control problem for an underwater vehicle. It is known that the desired target is usually defined as a point or a region. However, in some applications, it is required to navigate the underwater vehicle to the surface or a boundary of a region. In this work, a novel control law is proposed for an autonomous underwater vehicle where the desired...
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...
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