List of Articles Autonomous underwater vehicles

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - A Novel Hybrid Method in Global Path Planning for Autonomous Underwater Vehicles
  Shabnam Pesteh Ahmadreza Naghsh-Nilchi Farid Sheykholeslam
  Numerous methods have been developed to solve the path planning problem, among which the visibility graph, Voronoi diagram, Quad-Tree and Wave-Front are well-known techniques. In this paper, a new global path planning algorithm named HYBRID-Visibility-QuadTree-Voronoi-W More

  Numerous methods have been developed to solve the path planning problem, among which the visibility graph, Voronoi diagram, Quad-Tree and Wave-Front are well-known techniques. In this paper, a new global path planning algorithm named HYBRID-Visibility-QuadTree-Voronoi-WaveFront method (HYBRID-VQVW) is presented where these four methods are integrated in a single architecture. After constructing these global trajectories of C-space, the best trajectory among four is selected in every sampling distance by several criterions. These criterions consist of length, smoothness and safety of the trajectory. In fact, the algorithm provides a parametric tradeoff between shortest, safest and smoothest paths and generally yields shorter and smoother paths than the Voronoi, Quad-Tree and Wave-Front methods, and safer than the visibility graph. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Fuzzy Adaptive Control for Trajectory Tracking of Autonomous Underwater Vehicle
  Saeed Nakhkoob Abbas Chatraei Khoshnam Shojaei
  In this paper, the problem of the position and attitude tracking of an autonomous underwater vehicle (AUV) in the horizontal plane, under the presence of ocean current disturbances is discussed. The effect of the gradual variation of the parameters is taken into account More

  In this paper, the problem of the position and attitude tracking of an autonomous underwater vehicle (AUV) in the horizontal plane, under the presence of ocean current disturbances is discussed. The effect of the gradual variation of the parameters is taken into account. The effectiveness of the adaptive controller is compared with a feedback linearization method and fuzzy gain control approach. The proposed strategy has been tested through simulations. Also, the performance of the propos-ed method is compared with other strategies given in some other studies. The boundedness and asymptotic converge-nce properties of the control algorithm and its semi-global stability are analytically proven using Lyapunov stability theory and Barbalat’s lemma. Manuscript profile