... hypoc-ppo auv path planning path length direction angle artificial intelligence algorithm obstacle steering angle objective function mdp machine learning path segment policy model reinforcement learning denote objective drl-based policy hybrid policy model ABSTRACT...

... ABSTRACT The wave impact on piers is a concerning problem for coastal bridges. In this study, the coastal bridge pier is simplified to a two-dimensional fixed submerged obstacle, and the solitary wave interaction with it is simulated by the Smoothed Particle Hydrodynamics (SPH) code SPHinXsys...

... the path and improve smoothness. To avoid emergent obstacles in the global path in real-time, the Morphin search tree algorithm is introduced to dynamically plan the global path. The simulation results show that this algorithm can improve the performance and efficiency of path planning, and is more...

... artificial potential field method grid seabed mining vehicle obstacle path planning algorithm target position mining area colony algorithm ant colony algorithm Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25...

... pile formed during the interaction of ice and an inclined structure. The engineering structures, hinders the performance of shipping and main factors determining the development of ice rubble pile against an technological operations (Karulin et al., 2018), and complicates the obstacle are presented...

... of the AUV with the seabed constant in this paper to ensure the accuracy of each detection sensor as much as possible, and at the same time change the height to avoid possible obstacles. fuzzy subset auv collision avoidance language variable artificial intelligence controller horizontal rudder...

...ABSTRACT ABSTRACT To guide autonomous obstacle avoidance navigation of an unmanned sailboat, the customized A* collision avoidance path planning algorithm and the PID track following control algorithm based on the linear LOS (Line of Sight) guidance law are presented in this paper. Simulation...

... boat. wuhan university position relationship table constraint navigation collision avoidance algorithm marine transportation maneuverability path point intersection artificial intelligence dynamic obstacle safety obstacle path planning planning & scheduling collision...

... bim sustainable development maintenance layout optimization operation construction application framework information wind energy offshore wind farm obstacle life cycle management marine environment selection sustainability optimization artificial intelligence application wang...

... and experiment data were obtained. Based on this model, the pressure drag on front submerged breakwater and the wave transformation were studied. The numerical results showed that the negative peak value of front obstacle is larger than that of single submerged breakwater and the optimal distance, judged...

... obstacle is less and unclear. The mechanism for IWs' or SWs' generation, propagation and dissipation are the important topics for research. Although sequential data can be recorded by ADCP or CTD in the field observations, it is difficult to clearly analyze the interaction between IWs and SWs. Accordingly...

... environment. Through the constructed space-time environment model and the multi-constraint function for path optimization model, combining the collision detection of dynamic obstacles and the proposed path planning strategy, the optimal path of AUV in space-time environment is planned. Optimized...

... ABSTRACT In this paper, an improved genetic algorithm (GA) is proposed for the global three-dimensional (3D) path planning of an under-actuated autonomous underwater vehicle (AUV) with a static environment and obstacles. The kinematics of under-actuated AUV is studied, and various constraints...

... us government usv usv lei gao pipeline autonomous inspection system detection software algorithm inspection system autonomous obstacle avoidance surveyor pipeline pipeline detection submarine pipeline autonomous inspection system trajectory midstream oil & gas artificial...

... ABSTRACT In order to study the inhibition effects of placed obstacles and control mechanism of the re-entrant jet on the generation of the cloud cavitation, numerical simulations are performed on elliptic nose hydrofoils equipped with and without obstacles. A new modified stabilized SST k-ω...

...3D Space Obstacle Avoidance System for a Large-Scale Autonomous Underwater Vehicle Ben Li1 , Guanxue Wang1, Guohua Xu1 , Xin Zhang1, Han Xu2 1 Underwater Technology Laboratory, School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology Wuhan, Hubei Province...

... wave transmission. The leading crest and leading trough deform slightly due to shoaling effect when the wave passes on the front slope of the submerged obstacle. As the wave approaches the front slope, the flow in lower layer increases because of the narrow width between the leading trough and front...

... the perspective of navigation practice. genetic algorithm evolutionary algorithm path planning angle difference threshold ship path planning obstacle artificial intelligence pso algorithm vector optimization result algorithm nautical practice optimization study particle optimization problem...

... at Sea) with the CPA (Closest Point of Approach) concept. They used speed obstacles to avoid movement and static hazards. Campbell et al. (2012) put forward the prediction model of intelligent collision avoidance, made a detailed analysis of the international collision avoidance rules and applied...

... wave tank. The eKdV (extended Korteweg-de Vries) equation is used to explain ISWs and nonlinear (NL) turbulence model is established to solve the Reynolds-Average Navier-Stokes equation. The results show that the shape of the obstacle has an obvious effect on the hydraulic jumps and bores which...