Results 21 to 30 of about 787,118 (191)

Improved Immune Moth–Flame Optimization Based on Gene Correction for Automatic Reverse Parking [PDF]

Sensors
During the process of reverse parking, it is difficult to achieve the ideal reference trajectory while avoiding collision. In this study, with the aim of establishing reference trajectory optimization for automatic reverse parking that smooths and ...
Gang Liu, Xinli Xu, Longda Wang
doaj   +2 more sources

Context-Driven Ship, Vehicle, and Aircraft Detection in Colored Synthetic Aperture Radar (SAR) Images [PDF]

Sensors
In slow-time colorized subaperture image (CSI), anisotropic targets that reflect strongly when viewed from specific angles appear in vivid colors, which makes them stand out against isotropic background that reflects energy uniformly across all angles ...
Zhe Geng, Linyi Wu, Minjie Sun, Yu Zhang, Yuan Meng, Lujia Yao, Daiyin Zhu   +6 more
doaj   +2 more sources

A Novel COLREGs-Based Automatic Berthing Scheme for Autonomous Surface Vessels

Journal of Marine Science and Engineering
This paper tackles the highly challenging problem of automatic berthing for autonomous surface vessels (ASVs), encompassing trajectory planning, trajectory tracking, and collision avoidance. Firstly, a novel A* algorithm integrated with a quasi-uniform B-
Shouzheng Yuan, Gongwu Sun, Yunqian He, Yuxin Sun, Simeng Song, Wanyuan Zhang, Huifeng Jiao   +6 more
doaj   +2 more sources

Co-Design of USV Control System Based on Fuzzy Satisfactory Optimization for Automatic Target Arriving and Berthing

IEEE Access
Most of the previous research about unmanned surface vehicle (USV) control system just focuses on reaching the target but not considers berthing. Moreover, computation cost is rarely concerned.
Taoyi Chen, Huixiang Peng, Xiaoyu Chang, Xiaonan Zhang, Didi Wang   +4 more
doaj   +2 more sources

Automatic collision avoidance of ships [PDF]

, 2008
One of the key elements in automatic simulation of ship manoeuvring in confined waterways is route finding and collision avoidance. This paper presents a new practical method of automatic trajectory planning and collision avoidance based on an artificial
Lee, B.S., Han, D., Xue, Y.
core   +4 more sources

Evaluation Model of Ship Berthing Behavior Based on AIS Data

IEEE Open Journal of Intelligent Transportation Systems, 2022
In recent years, the research on ship behavior and ship berthing behavior is a hot topic in the navigation theory research, but the research on ship berthing behavior evaluation is relatively less.
Cheng Fang, Jingang Yin, Hongxiang Ren
doaj   +1 more source

Reinforcement Learning-Based Automatic Berthing System

CoRR, 2021
Previous studies on automatic berthing systems based on artificial neural network (ANN) showed great berthing performance by training the ANN with ship berthing data as training data. However, because the ANN requires a large amount of training data to yield robust performance, the ANN-based automatic berthing system is somewhat limited due to the ...
openaire   +3 more sources

Path following algorithm application to automatic berthing control [PDF]

Journal of Marine Science and Technology, 2020
AbstractThis paper aims to verify a new automatic berthing system using a path following algorithm. Berthing operation is one of the most burdensome tasks for crews among several ship operations. The maneuverability of a ship at low speed during berthing operation deteriorates and becomes more vulnerable to disturbances such as wind.
Ryohei Sawada, Koichi Hirata, Yasushi Kitagawa, Eiko Saito, Michio Ueno, Katsuji Tanizawa, Junji Fukuto   +6 more
openaire   +1 more source

An overview of developments and challenges for unmanned surface vehicle autonomous berthing

Complex & Intelligent Systems, 2023
With the continuous progress of contemporary science and technology and the increasing requirements for marine vehicles in various fields, the intelligence and automation of ships have become a general trend.
Gongxing Wu, Debiao Li, Hao Ding, Danda Shi, Bing Han   +4 more
doaj   +1 more source

Warm-started semionline trajectory planner for ship’s automatic docking (berthing)

Ocean Engineering, 2022
In the usual framework of control, a reference trajectory is needed as the set point for a feedback controller. This reference trajectory can be generated by solving a trajectory optimization problem. This problem is a continuous optimal control problem (OCP) that is transcribed into a finite-dimensional nonlinear optimization problem (NLP) and solved ...
Dimas M. Rachman, Atsuo Maki, Yoshiki Miyauchi, Naoya Umeda   +3 more
openaire   +3 more sources