• Title/Summary/Keyword: Unmanned ship

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A Design and Implementation of Wi-Fi Based Unmanned Ship Control System (무선랜 기반 무인선박 제어시스템 설계 및 구현)

  • Kim, Dong-Hyun;Lee, Chae-Seok;Kim, Jong-Deok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.2
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    • pp.437-444
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    • 2014
  • The unmanned ship control system controls the unmanned ship at a distance in ocean. Expecially, in order to control the unmanned ship, it needs the wireless communication networks and we use the IEEE 802.11 based WLAN. The IEEE 802.11 based WLAN technology for supporting a wide bandwidth is suitable for unmanned ship control system which has to transmit the multimedia data. First, we design the system structure for controlling the unmanned ship. Then, in order to overcome the limited communication area, we design the network structure for the unmanned ship communication network which can use a various communication network. we implemented and evaluated the unmanned ship system based on WLAN. We controlled the unmanned ship by use the WLAN and confirmed the signal feature of WLAN in the ocean.

Implementation of an Obstacle Avoidance System Based on a Low-cost LiDAR Sensor for Autonomous Navigation of an Unmanned Ship (무인선박의 자율운항을 위한 저가형 LiDAR센서 기반의 장애물 회피 시스템 구현)

  • Song, HyunWoo;Lee, Kwangkook;Kim, Dong Hun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.68 no.3
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    • pp.480-488
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    • 2019
  • In this paper, we propose an obstacle avoidance system for an unmanned ship to navigate safely in dynamic environments. Also, in this paper, one-dimensional low-cost lidar sensor is used, and a servo motor is used to implement the lidar sensor in a two-dimensional space. The distance and direction of an obstacle are measured through the two-dimensional lidar sensor. The unmanned ship is controlled by the application at a Tablet PC. The user inputs the coordinates of the destination in Google maps. Then the position of the unmanned ship is compared with the position of the destination through GPS and a geomagnetic sensor. If the unmanned ship finds obstacles while moving to its destination, it avoids obstacles through a fuzzy control-based algorithm. The paper shows that the experimental results can effectively construct an obstacle avoidance system for an unmanned ship with a low-cost LiDAR sensor using fuzzy control.

A Study on the Development of an Unmanned Marine probing Ship (소형 무인 해양탐사선 개발에 관한 연구)

  • 김상철;임종환;강철웅
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.312-315
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    • 2003
  • The paper presents a small. unmanned remote controlled probing ship that can reduce the cost for acquiring data of marine and coastal environments. The control system is composed of three microprocessors. one is for overall mission control. another for control of propulsion motors. and the other for sensor operation. For communication system, we adopt direct and indirect methods based on the wireless modem of commercial cellular telephone. The former is a direct communication between the modems of the ship and the server. and the latter is an indirect communication via internet between the ship and the server. The system is equipped with a digital compass and a GPS system for position estimation, and extended Kalman filter is used for the data association. The performance of the ship is demonstrated with the results produced by sets of experiments.

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Design and Running of a Surveying Ship for Bathymetry of The Manned and Unmanned Control System (유.무인운용 가능한 수심측량을 위한 측량선 설계 및 구현)

  • Choi, Hyun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.1
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    • pp.16-21
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    • 2011
  • Bathymetry which is mainly used on the earth or the sea can be surveyed directly by a person who is on a surveying ship or in a way one estimates the target through a surveying ship. However, the surveying ship which is being used now is divided into a manned and unmanned system and it's difficult to deal with it appropriately according to the water depth or the condition of weather. Therefore, this study will invent the surveying ship that can measure the water depth with the unmanned remote control system in the place where it's difficult to for man access because of a bad weather or a vast area. There are two methods in the control system of the manned and unmanned surveying ship which has been developed in this study. One is an automatic control which moves on the path set by the user in advance and the other is the optimized passive control in which the control station can manage the direction and speed of a surveying ship directly.

Development of a Small Unmanned Marine Prober and Navigation (소형 무인해양탐사선 및 항법 개발)

  • 임종환;강철웅
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.3
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    • pp.59-65
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    • 2004
  • The paper presents a small unmanned probing ship that can be used for acquiring information on marine and coastal environments. For communication system, we adopt direct and indirect methods based on the wireless modem of a commercial cellular telephone. The former is a direct communication between the modems of the ship and the server, and the latter is an indirect communication via internet between the ship and the server. The system is equipped with a digital compass and a GPS for position estimation, and extended Kalman filter is used for Navigation. The performance of the ship is demonstrated with the results produced by sets of experiments.

Analysis of Operational Requirements for Mother Ship with a Mounted Unmanned Surface Vehicle(USV) Using the Development Process of the Operational Concept (운용개념 개발 프로세스를 활용한 무인수상정(USV) 탑재 모함의 운용 요구사항 분석)

  • Hur, Jang Wan;Hong, Soon Kook;Lim, Kyung Han;Ryu, Jae Kwan
    • Journal of the Korean Society of Systems Engineering
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    • v.16 no.1
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    • pp.25-35
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    • 2020
  • The South Korean Navy is making efforts to acquire vessels that the new technology of the 4th industry is applied, and as a part of these efforts, it has a plan to mount and operate an Unmanned Surface Vehicle(USV) on a vessel that will be introduced later. However, the recent studies have focused on only development of common platforms and mission equipment for the USV, and have not sufficiently analyzed studies and operatinoal requirements on mother ship that will operate the mounted USV. Hence, this study analyzed and presented requirements of mother ship with the mounted USV in order to operate effectively it when the future medium and large vessels to be acquired by the South Korean Navy intent to operate the USV.

A Study on a 3-D Localization of a AUV Based on a Mother Ship (무인모선기반 무인잠수정의 3차원 위치계측 기법에 관한 연구)

  • LIM JONG-HWAN;KANG CHUL-UNC;KIM SUNG-KYUN
    • Journal of Ocean Engineering and Technology
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    • v.19 no.2 s.63
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    • pp.74-81
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    • 2005
  • A 3-D localization method of an autonomous underwater vehicle (AUV) has been developed, which can solve the limitations oj the conventional localization, such as LBL or SBL that reduces the flexibility and availability of the AUV. The system is composed of a mother ship (small unmanned marine prober) on the surface of the water and an unmanned underwater vehicle in the water. The mother ship is equipped with a digital compass and a GPS for position information, and an extended Kalman filter is used for position estimation. For the localization of the AUV, we used only non-inertial sensors, such as a digital compass, a pressure sensor, a clinometer, and ultrasonic sensors. From the orientation and velocity information, a priori position of the AUV is estimated by applying the dead reckoning method. Based on the extended Kalman filter algorithm, a posteriori position of the AUV is, then, updated by using the distance between the AUV and a mother ship on the surface of the water, together with the depth information from the pressure sensor.

The Efficient Ship Wireless Sensor Network Using Drone (드론을 활용한 효율적인 선박 센서 네트워크)

  • Hong, Sung-Hwa;Kim, Byoung-Kug
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.1
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    • pp.122-127
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    • 2022
  • Currently, the drone is considered as a mobile base station of USN as a method to act as a base station using USN in existing LTE-M and LTE networks for data transmission in unmanned ships. Therefore, the drone, which is a mobile base station, is a sink node equipped with an LTE modem or a short-range communication modem, and can collect safety information of ship operation from the sensor node and transmit the safety information to the ship or transmit the information between the ships. As, if a short-range network is formed by using drones, it will form a communication network around unmanned ships and will be advantageous for collecting information using security and environmental sensors. In this paper, we propose a method to transmit environmental sensor data and to utilize communication between ships using drones to secure the surrounding information necessary for AI operation of unmanned ships in the future.