• Title/Summary/Keyword: smart ships

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Conceptual Research on a Display System for Autonomous Navigation Assistance Service (자율운항지원 서비스 전시시스템 개념 연구)

  • Moo-Woong Jeong;Il-Sik Shin
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2022.06a
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    • pp.447-448
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    • 2022
  • Studies on autonomous ships has received a lot of attention, recently. However, a study on autonomous navigation assistance service for Navigation Assistance Service(NAS) which is second item of Maritime Service Portfolio(MSP) suggested by IMO was not studied. Therefore, in this paper, we derive information items for autonomous navigation assistance service and research on a display system for displaying the items.

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A Methodology for the Ship System Integration with Open Architecture : Focusing on the Total Ship Computing Environment based Architecture Building and Validation (개방형 구조(OA)를 이용한 함정체계통합 구축 방법론 : 통합함정컴퓨팅환경(TSCE)기반 아키텍처 구축 및 검증을 중심으로)

  • Park, Gang-Soo;Yoo, Byeong-Chun;Kim, Kyeongtaek;Choi, Bong-Wan
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.43 no.3
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    • pp.68-76
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    • 2020
  • In a series of recent launch tests, North Korea has been improving the firepower of its missiles that can target South Korea. North Korea's missiles and submarines are capable of threatening targets in South Korea and are likely faster and more covert than the systems previously seen in North Korea. The advanced threats require that ROK Navy should not only detect them earlier than ever but also response quicker than ever. In addition to increasing threats, the number of young man that can be enlisted for military service has been dramatically decreasing. To deal with these difficulty, ROK navy has been making various efforts to acquire a SMART warship having enhanced defense capability with fewer human resources. For quick response time with fewer operators, ROK Navy should improve the efficiency of systems and control tower mounted on the ship by promoting the Ship System Integration. Total Ship Computing Environment (TSCE) is a method of providing single computing environment for all ship systems. Though several years have passed since the first proposal of TSCE, limited information has been provided and domestic research on the TSCE is still in its infancy. In this paper, we apply TSCE with open architecture (OA) to solve the problems that ROK Navy is facing in order to meet the requirements for the SMART ship. We first review the level of Ship System Integration of both domestic and foreign ships. Then, based on analyses of integration demands for SMART warship, we apply real time OA to design architecture for TSCE from functional view and physical view. Simulation result shows that the proposed architecture has faster response time than the response time of the existing architecture and satisfies its design requirements.

Torque Ripple Reduction Method With Enhanced Efficiency of Multi-phase BLDC Motor Drive Systems Under Open Fault Conditions (다상 BLDC 모터 드라이브 시스템의 개방 고장 시 효율 향상이 고려된 토크 리플 저감 대책)

  • Kim, Tae-Yun;Suh, Yong-Sug;Park, Hyeon-Cheol
    • The Transactions of the Korean Institute of Power Electronics
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    • v.27 no.1
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    • pp.33-39
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    • 2022
  • A multi-phase brushless direct current (BLDC) motor is widely used in large-capacity electric propulsion systems such as submarines and electric ships. In particular, in the field of military submarines, the polyphaser motor must suppress torque ripple in various failure situations to reduce noise and ensure stable operation for a long time. In this paper, we propose a polyphaser current control method that can improve efficiency and reduce torque ripple by minimizing the increase in stator winding loss at maximum output torque by controlling the phase angle and amplitude of the steady-state current during open circuit failure of the stator winding. The proposed control method controls the magnitude and phase angle of the healthy phase current, excluding the faulty phase, to compensate for the torque ripple that occurs in the case of a phase open failure of the motor. The magnitude and phase angle of the controlled steady-state current are calculated for each phase so that copper loss increase is minimized. The proposed control method was verified using hardware-in-the-loop simulation (HILS) of a 12-phase BLDC motor. HILS verification confirmed that the increase in the loss of the stator winding and the magnitude of the torque ripple decreased compared with the open phase fault of the motor.

A Study on the Estimation of Mooring Force of the T/S HANBADA (실습선 한바다호의 계류력 추정연구)

  • Seo, Dae-Won;Oh, Jungkeun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.5
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    • pp.819-826
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    • 2022
  • Recently, interest in smart port systems for linking with autonomous ships is increasing. To build a smart port system, primarily, a system that can automatically moor a vessel is required. To calculate the allowable mooring capacity of the automatic mooring system in a port, the characteristics of the vessel must be considered, and the external force generated from environmental disturbances in the sea must be accurately calculated. Accurately estimating the magnitude of these environmental disturbances is an extremely important factor for designing an automatic mooring system. In this study, the mooring capacity of the HANBADA was estimated according to the port and fishing port design criteria of the Ministry of Ocean and Fisheries. The longitudinal and lateral forces of the mooring force acting on the HANBADA were 18 kN and 248 kN, respectively, under the most extreme ocean conditions (BF 6).

Design of Dual Network Topology and Redundant Transmitting Protocol for High Survivability of Ship Area Network (SAN) (네트워크 생존성을 고려한 선박 통신망(SAN)의 이중화 네트워크 토폴로지 및 중복 전송 프로토콜의 설계)

  • Son, Chi-Won;Shin, Jung-Hwa;Jung, Min-Young;Moon, Kyeong-Deok;Park, Jun-Hee;Lee, Kwang-Il;Tak, Sung-Woo
    • The KIPS Transactions:PartC
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    • v.17C no.1
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    • pp.119-128
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    • 2010
  • In the shipbuilding industry, due to the global trends where the number of IT (Information Technology) devices of a smart ship have been increased rapidly, the need to develop a new shipboard backbone network has recently emerged for integrating and managing the IT devices of a smart ship efficiently. A shipboard backbone network requires high survivability because it is constructed in automatic and unmanned smart ships where a failure of the backbone network can cause critical problems. The purpose of this paper thus is to study SAN (Ship Area Network) as a efficient shipboard backbone network, considering particularity of shipboard environment and requirement of high survivability. In order to do so, we designed a dual network topology that all network nodes, including the IT devices installed in a smart ship, are connected each other through dual paths, and reuding tht IT devices pnstalles supporices network survivability as well as t Iffic efficiency for the dual network topology. And then, we verified the performance of the suggested SAN by theoretical and practical analysis including the graph theory, the probability theory, implemental specifications, and computer simulations.

Development of The High-Speed Container Handling System with On-Chassis Type (온-섀시 방식의 고속 컨테이너 하역시스템 개발)

  • Choi, Kook-Jin
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.2_2
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    • pp.323-332
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    • 2020
  • Container ships are getting bigger due to the increase in global cargo volume. Therefore, it needs to increase the speed for loading and unloading of containers at the quayside. Traditionally, only one container is handled at once at the quayside due to it's heavy weight. In this paper, a method of handling multiple containers at once using chassis is proposed. Proposed system is consists of a container chassis that can hold three layer stacked containers, transport system that can handle the container chassis including rail-based or vehicle-based roll-on roll-off systems, and dedicated crane system. The conceptual design of crane and transport system that can handle three stacked containers is carried out and verified. The proposed system can be adopted for real quayside container handling system with high speed.

Intelligent Support System for Ship Steering Control System Based on Network

  • Seo, Ki-Yeol;Suh, Sang-Hyun;Park, Gyei-Kark
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.1
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    • pp.301-306
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    • 2006
  • The important field of research on ship operation is related to the high efficiency of transportation, the convenience of maneuvering ships and the safety of navigation. As a way of practical application for a smart ship based on network system, this paper proposes the intelligent support system for ship steering control system based on TCP/IP and desires to testify the validity of the proposal by applying the fuzzy control model to the steering control system. As the specific study methods, the fuzzy inference was adopted to build the maneuvering models of steersman, and then the network system was implemented using the TCP/IP socket-based programming. Lastly, the miniature model steering control system combined with LIBL (Linguistic Instruction-based Learning) was designed to testify for its effectiveness.

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Study on the Smart Level of Aids to Marine Navigation (항로표지의 스마트단계에 관한 연구)

  • Joo-Young Lee;Na-Rae You;Hyun-Ho Song;Ki-Won Kwon;Yang-Seob Kim;Se-Woong Oh
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2022.06a
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    • pp.79-80
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    • 2022
  • 항로표지의 핵심기능은 항행선박에게 위치, 방향, 장애물의 위치 등을 알려주는 항행보조시설로서 현장 중심의 신호체계이며, 고유의 핵심역할 수행을 위한 유지보수는 중요한 이슈이다. 최근 4차 산업혁명 관련 첨단기술의 발전으로 자율운항선박(MASS) 등 다양한 해양교통수단의 개발 및 도입에 따라 항행 보조시설인 항로표지에 대한 스마트 단계에 대한 연구를 진행하고 있다. 지금까지 다양한 산업에서의 스마트 및 자율화 단계에 대한 선행조사·분석을 통해 항로표지의 스마트 단계를 4개로 구분하고, 핵심역할 및 기능을 세분화하여 제시한다.

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A Study of Test and Evaluation Methods for Manpower of System of System (함정 전투성능 신뢰성 보장을 위한 승조원 수 적절성 시험평가 제한점 및 시험평가 제도 개선방안)

  • Byeongjun An;Jeongho Song
    • Journal of the Korean Society of Systems Engineering
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    • v.20 no.1
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    • pp.16-25
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    • 2024
  • By deriving the limitations of the test evaluation, it was intended to suggest a plan to improve the test evaluation system for the appropriateness of the number of ship crews according to the design and construction of troops-saving ships. Currently, the number of crew members by ship type is confirmed and specified in the ROC(Operation Requirement Performance) in the early stages of design, such as conceptual design, but there is a limit to testing and evaluating the appropriateness of ensuring reliability of combat performance.

Trade Change in Shipping and Logistics : The Case of HMM

  • Kim, So Hyung
    • International journal of advanced smart convergence
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    • v.13 no.1
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    • pp.69-76
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    • 2024
  • The objective of this paper is to investigate digital transformation in logistics within the shipping and logistics industry. This paper examines the case of Hyundai Merchant Marine (HMM) and draws insights from its success in becoming the top company amidst the industry challenges. To achieve a more in-depth analysis, a single-case study approach was employed. Various secondary data have been analyzed to support the examination of HMM's digital transformation. HMM has emerged as a global leader in transportation services. The company's success is attributed to its development of diverse ships, robust logistics systems, and pioneering a digital logistics platform, ultimately overcoming the crisis. Especially, this paper show that the digitalization of logistics has been analyzed as the most significant transformation. The findings of this paper can offer valuable implications for other companies grappling with similar challenges in the current trade landscape.