Results 1 to 10 of about 18,515 (114)
Dynamic Obstacle Avoidance for Unmanned Underwater Vehicles Based on an Improved Velocity Obstacle Method [PDF]
Sensors, 2017 In view of a dynamic obstacle environment with motion uncertainty, we present a dynamic collision avoidance method based on the collision risk assessment and improved velocity obstacle method.
Wei Zhang +5 more
doaj +4 more sources
ISPRS International Journal of Geo-Information, 2021 Focusing on the collision avoidance problem for Unmanned Surface Vehicles (USVs) in the scenario of multi-vessel encounters, a USV autonomous obstacle avoidance algorithm based on the improved velocity obstacle method is proposed.
Jia Ren, Jing Zhang, Yani Cui
doaj +3 more sources
IEEE Access, 2020 It is challenging for a mobile robot to avoid moving obstacles in dynamic environments. Traditional velocity obstacle methods do not fully consider the obstacles moving with the speeds larger than the maximum speed of the robot.
Tianye Xu +4 more
doaj +3 more sources
A Path Planning Method for Intelligent Ships Based on the Improved Artificial Potential Field Algorithm [PDF]
SensorsPath planning for unmanned ships has become an important research topic in recent years. To enhance navigation safety and reduce collision risk, this study proposes an improved artificial potential field (IAPF) method.
Xiao Liu +4 more
doaj +2 more sources
Analysis of an average velocity of a pipe with flowing fluid in case of a hydraulic obstacle
Lietuvos Matematikos Rinkinys, 2000 Calculation of average velocity of a fluid flow inside a pipe with an asymmetrical obstacle was carried out. Calculations consider flow maximum velocity co-ordinate to move in proportion with the obstacle thickness.
Rimantas Didžgalvis +2 more
doaj +3 more sources
Cooperative Obstacle Avoidance for Multiple UAVs Using Spline_VO Method
Sensors, 2022 In order to solve multiple unmanned aerial vehicle (UAV) dynamic collision avoidance, a cooperative obstacle avoidance algorithm considering UAV’s kinematic constraints has been developed.
Mingzhu Peng, Wei Meng
doaj +1 more source
IEEE Access, 2022 When humans and robots operate in and occupy the same local space, proximity detection and proactive collision avoidance is of high importance.
Samuel Karlsson +2 more
doaj +1 more source
Numerical Study of the Effects of a Hot Obstacle on Natural Convection Flow Regimes [PDF]
Journal of Applied Fluid Mechanics, 2023 A numerical study was conducted for natural turbulent and laminar convection induced by a circular hot obstacle in two different positions, the heat obstacle is introduced at the inlet of the cylinder and inside the cylinder.
Z. Yahya, A M. Mahmoud
doaj +1 more source
An Obstacle Avoidance and Trajectory Tracking Algorithm for Redundant Manipulator End
IEEE Access, 2022 An obstacle avoidance algorithm was suggested in this study to handle the redundant manipulator’s end trajectory planning problem, with the accuracy of the end trajectory guaranteed to be within the projected error.
Hao Yang +3 more
doaj +1 more source
AgriEngineering, 2022 Turbulence phenomena created around a greenhouse due to different wind loads are key factors in its structural design and significantly affect the ventilation rates through its side and roof openings.
Georgios Partheniotis +4 more
doaj +1 more source