Results 11 to 20 of about 13,668 (246)

Vehicle-aircraft conflict detection on the airport surface: an improved velocity obstacle method

open access: yesDigital Transportation and Safety
Airport surface operations involve a complex interplay between various vehicles and aircraft, making conflict detection a critical aspect of ensuring safety and efficiency.
Feixiang Zhou   +4 more
doaj   +2 more sources

Application of Improved Blocked-Off Method to Simulate the Interacting Influences of Obstacle Shape and Wall Velocity on the Turbulent Mixed Convection Flow in a Trapezoidal Cavity [PDF]

open access: yesInternational Journal of Advanced Design and Manufacturing Technology, 2022
In the current research, interaction influences of obstacle shape and top wall velocity on the hydrothermal behaviours of the turbulent mixed convection flow in a trapezoidal cavity are numerically simulated.
Meysam Atashafrooz
doaj   +1 more source

Numerical Study of the Effects of a Hot Obstacle on Natural Convection Flow Regimes [PDF]

open access: yesJournal 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

open access: yesIEEE 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

A trajectory planning method for the redundant manipulator based on configuration plane

open access: yesInternational Journal of Advanced Robotic Systems, 2021
This study focuses on the method of trajectory planning of spatial obstacle avoidance for redundant manipulators based on configuration plane method.
Yanhui Wei   +3 more
doaj   +1 more source

Novel Method of Obstacle Avoidance Planning for Redundant Sliding Manipulators

open access: yesIEEE Access, 2020
In this paper, a weighted additional deviation velocity on the basis of the gradient projection (GP-WADV) method is proposed to solve obstacle avoidance problems of the redundant manipulator under the condition of known end-effector trajectory.
Jinguo Liu   +3 more
doaj   +1 more source

An ADS-B Information-Based Collision Avoidance Methodology to UAV

open access: yesActuators, 2023
A collision avoidance method that is specifically tailored for UAVs (unmanned aerial vehicles) operating in converging airspace is proposed. The method is based on ADS-B messages and it aims to detect and resolve conflicts between UAVs.
Liang Tong   +4 more
doaj   +1 more source

Optimized Dynamic Collision Avoidance Algorithm for USV Path Planning

open access: yesSensors, 2023
Ship collision avoidance is a complex process that is influenced by numerous factors. In this study, we propose a novel method called the Optimal Collision Avoidance Point (OCAP) for unmanned surface vehicles (USVs) to determine when to take appropriate ...
Hongyang Zhu, Yi Ding
doaj   +1 more source

Proactive Collision Avoidance for ASVs using A Dynamic Reciprocal Velocity Obstacles Method [PDF]

open access: yes2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2018
We propose a collision avoidance method that incorporates the interactive behavior of agents and is proactive in dealing with the uncertainty of the future behavior of obstacles. The proposed method considers interactions that will be experienced by an autonomous surface vessel (ASV) in an environment governed by the international regulations for ...
Kufoalor, D. Kwame Minde   +2 more
openaire   +2 more sources

Unmanned Surface Vehicle Collision Avoidance Trajectory Planning in an Uncertain Environment

open access: yesIEEE Access, 2020
Unmanned surface vehicles (USVs) can encounter undetected moving obstacles while sailing along a planned global path. USVs need to plan collision avoidance trajectories for moving obstacles. In this paper, an algorithm based on the Gaussian mixture model
Guoqin Xia   +3 more
doaj   +1 more source

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