• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.11
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• pp.96-104
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• 2018

Military vessels are complex weapon systems consisting of various integrated onboard equipment. Since their acquisition of military equipment takes a long period of time and a prototype ship is deployed and tested, vessel development has relied on its proprietary process. However, due to the growing complexity of onboard equipment technology, application of systems engineering (SE) process has become indispensable. Nonetheless, an effective design process complementing the existing design with the SE has not yet been developed. As such, we have studied an improved basic design process for submarines based on SE. To do so, we analyzed the processes for the basic design, technical review, and requirement management. Included reviews and requirements are SRR, SFR and PDR, and SSRS, SSS, and SSDD. By combining the results in the SE framework, we built an improved basic design process that can be applied in parallel with the SE-based technical review and requirement management. To assess the process, we applied our proposed model to the submarine development undergoing the basic design phase. It is possible to effectively manage the requirements, design artifacts and improve traceability, and also utilize them as test and evaluation materials. The SE-based basic design process is expected to be useful in other kinds of vessel design.

• Journal of Navigation and Port Research
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• v.42 no.5
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• pp.311-316
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• 2018

IMO introduced the concept of e-Navigation and proposed MSPs(Maritime Service Portfolios) concept to reduce marine accidents, to improve efficiency of ship operation, port operation, and ship operation technology. Korean e-Navigation defines S1 ~ S5 services, as the service concept focused on domestic e-Navigation service corresponding to IMO MSPs, and is constructing a system as an ongoing project. S2 service (onboard system remote monitoring service) among the concepts of Korean e-Navigation services, is a service concept that judges the emergency level according to risk if an abnormal condition occurs during navigation, and provides corresponding guidance to accident ships based on emergency level. The purpose of this paper is to provide a basic architecture proposal of Korean e-Navigation S2 service navigation safety module, based on the S2 service operation concept. To do this, we conducted a questionnaire survey to ask experts with experience with sailors, to respond to the subjective risk experienced by sailors considering effects of anomalies, including equipment failure relative to sailing and navigational safety. Risk level for each abnormal condition was classified. The basic algorithm design of the navigation safety module is composed of safety index (SI) calculation module based on results of questionnaire and expert opinions, safety level (SL) determination module according to safety index, and corresponding guidance generation module according to safety level. To conduct basic validation of basic architecture of the navigation safety module, simulation of the ship anomaly monitoring was performed, and results have been revealed.

• Journal of the Korean Society of Marine Environment & Safety
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• v.26 no.6
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• pp.606-614
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• 2020

The administrative ship, Chuja-ho, is the only mode of transportation between manned islands in the Chuja-do, Jeju. Chuja-ho is a 25-year-old age, which is identified to pass the persisting period (25 years) for public ships, and there is an urgent need for a replacement. The residents of the island are also requesting that the new administrative ship be outfitted with medical functions because there is no sea transportation system for medical emergencies in Chuja-do. The purpose of this study is to examine the required functions of a new administrative ship outfitted with medical functions and to suggest a conceptual design. In order to review the necessity of an emergency patient transport system, user requirements were surveyed and analyzed, and the ship's condition assessed by ship experts who carried out an on-site survey and analysis of ship survey data. Thereafter, a conceptual design for a new administrative ship with medical functions was presented. The results of this study can be used during a review of a new budget plan and for basic ship designs during the replacement project by the local government. It is also expected to improve the safety and medical environment of Chuja-do residents.

• Journal of the Korean Institute of Navigation
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• v.13 no.2
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• pp.57-73
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• 1989

This paper presents a practical method to predict the characteristics of ship manoeuvring motions. A attempt is made to calculate the manoeuvring motions utilizing principal particulars of ship hull, properller and rudder as basic input data. The mathematical models, which describe the ship manoeuvring motions, are developed on the basis of MMG(5), Inoue(17), Hooft(18) and so on. Calcuations of manoeuvring motions for three kinds of typical characteristics, namely turning motion, zig-zag manoeuvre response and steady turning performance, are carried out. In order to examine the validity of the calculation method of this paper, simulations are run for seven merchant ships employed by Inoue(4). The computed results by present method are compared with full scale trials and Inoue's calculations(4). It can be concluded that the calculation method proposed in this paper is useful and pwoerful for prediction of characteristics of ship manoeuvring motions at the initial design phase or the application study on manoeuvring motions.

• Journal of the Korea Institute of Military Science and Technology
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• v.25 no.3
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• pp.259-266
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• 2022

This study aims to introduce missile live-fire during the ship operational test and evaluation(T&E) as a means of verifying the integrated combat capability(ICC) of various systems installed on naval ships. The research method identified domestic and foreign T&E systems and cases, and reports related to ICC, which were written during the ship's design stage. As a result of research, Republic of Korea is not conducting the missile live-fire at the ship T&E stage due to the lack of relevant systems, while the U.S. is conducting it based on the mission-based T&E and the end-to-end test system. As a way to improve within the current domestic ship acquisition systems, the reaction time analysis, a quantitative analysis result of ICC calculated at the ship basic design stage, was proposed to be verified by missile live-fire during ship operational T&E.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2001.10a
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• pp.290-293
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• 2001

The mid-schedule planning of the ship is making a schedule about the process from cutting to erection. The ship consists of lots of blocks. This block has different process because of the shape of the block varies in accordance with the ship-type and the part position of the ship. The type and order of each block process initially must be generated for the mid-schedule planning. In this paper, the process planning, described as above is preparing the basic information before scheduler make a plan with the prepared manhour. The scheduling is done with this process planning which includes the information of the process order. This paper shows the research about three methods to design the process planning. First, investigate the expression method about information of the process planning for the mid-schedule planning in real workplace. Second, design the object of the process planning on the basis of investigating the expression method. Finally, develop the prototype of object on the basis of this designed process planning and then find the practical use in the mid-schedule planning. The object, which is developed in this paper, contains the main algorithm. In case of developing The Mid-Schedule Planning System, this object is expected to be utilized very easily as consisting another object.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.29 no.1
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• pp.11-20
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• 1993

The purpose of this paper is to study the subject of economic evaluation in respect of optimum ship size and basic design spiral for fishing vessels. The main ta나 is developed the methodology of engineering economic system in order to apply various methods and tools which may be utilized by the designer in his efforts to arrive at principal design characteristics of fishing vessels with optimum size. The design procedure has been modeled in mathematical form with CBR as an criteria and applied to the optimization method. The contents of the study are as follows (the special treatises).

• Journal of Korea Ship Safrty Technology Authority
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• s.23
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• pp.51-64
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• 2007

Main concern of this subject is "hat type of hull shape is most important for building aluminum fishing vessel and suitable for domestic fisherman." For the this subject, We research from traditional hull shape of fiberglass fishing vessel and supply to our domestic fisherman with 3D render images. Following the above job making with concept design and basic drawing for product model. And most important research job with technical of aluminum vessel and products system and standard of job description. We filled two category with design and products for our domestic fisherman.

• Journal of the Society of Naval Architects of Korea
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• v.41 no.2
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• pp.121-127
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• 2004

The objective of this study is to design the technical information system for naval engineering (named TISNE). As the basic concept of the system, CALS (Continuous Acquisition and Life-cycle Support) and KMS(Knowledge Management System) were considered for the management and sharing of standardized digital information throughout the life-cycle of naval ship. To define the system components and their functionalities, the processes of naval ship design and construction were reviewed. Also web-based system prototype and the graphical user interlaces were designed and implemented.

• Journal of Institute of Control, Robotics and Systems
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• v.12 no.9
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• pp.850-855
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• 2006

This is concerned with the development and design of automatic maneuvering system using Differential Global Positioning System(DGPS). To achievement of autonomous maneuvering controller for giant ship, first, we investigated automatic maneuvering controller using DGPS in motor car. The sensors are configured with DGPS and digital compass. We calculated velocity and steering angle of motor car based on sensor signal. To design the controller, we derived the bicycle model and developed critically damped controller. The critically damped controller can be tracing previously appointed position in the fastest time. We are used a laptop computer to realize and the control algorithm is programmed by visual basic software. The obtained experimental results from developed system show unmanned motor car is good tracing planed positions. Hence, the system is looking forward to use the autonomous maneuvering control fur giant ship.