선박의 운동 운항환경 모니터링 시스템 개발

윤현규,이경중,이동곤 한국항해항만학회 2008 한국항해항만학회지 Vol.32 No.2

A ship in a sea cruises with rolling, pitching, heaving etc because of environmental causes such as wind and wave. Those motions make crews or passengers feel inconvenience and they feel acceleration changes. Therefore, if lateral and vertical accelerations can be measured at a specific position in a ship, it can be known how discomfortable crews or passengers are. The motion monitoring system developed in this paper consists of measuring and communicating part including five accelerometers and gyro and a main computer which acquires measuring data and calculates motion indices. MSI(Motion Sickness Incidence) and MII(Motion Induced Interrupt) are calculated in real time using measured acceleration and angular rate. The validity of the developed system was confirmed through the real ship test of Hannara which is the school ship of Korea Maritime University. 바다에서 운항하는 선박은 바람과 파도 등의 외란 때문에 횡동요(Rolling), 종동요(Pitching), 상하동요(Heaving) 등의 운동을 하게 되며, 이러한 운동은 가속도 형태로 승객이 느끼게 된다. 따라서, 선박내의 특정 지점에서 좌우방향, 상하방향 가속도와 각속도 등을 계측하면 선원 또는 승객이 선박 운동에 어느 정도 피폭되었는가를 알 수 있다. 본 연구에서 개발한 운동 운항환경 모니터링 시스템은 4개의 가속도계와 가속도계, 자이로가 포함된 관성 자세계측장치, 데이터 취득장치를 포함한 계측 및 통신부, 중앙에서 데이터를 관리하고, 운항환경 지수를 계산하는 전산기로 구성되고, 계측된 가속도와 각속도를 이용하여 운항환경을 나타내는 정량적 지수인 뱃멀미 지수(Motion Sickness Incidence, MSI), 운동유발 작업방해회수(Motion Induced Interrupt, MII)를 실시간으로 계산한다. 개발된 시스템은 한국해양대학교 실습선인 한나라호의 부산-목포, 부산-제주 연안항해시 실선시험을 통하여 유효성을 확인하였다.

Development of simple and rapid HLA-C genotyping method using an oligonucleotide microarray

윤현규,정인혁,Hee-Jin Kim,Ki-O Lee,Jun Sub Kim,Eui-Jin Park,Sang Yong Song,Sa Ik Bang,김태성,황승용 한국바이오칩학회 2011 BioChip Journal Vol.5 No.3

Human Leukocyte Antigen (HLA), called human Major Histocompatibility Complex (MHC), performs the crucial function of antigen presentation in human immunity, and correctly matched HLA antigens improves survival and reduces immunological complications. Therefore, a precise HLA typing method is necessary for successful transplantation between donor and recipient. Until now, many methods have been developed for HLA typing, including serological and DNA-based methods. However, these previous methods have been somewhat limited due to their requirements for a large number of samples and complex experimental procedures. To resolve this problem, in this study, we developed rapid genotyping methods for HLA-C using an oligonucleotide microarray. To evaluate the performance of the HLA-C genotyping microarray, we analyzed 50 unrelated Korean individuals. The genotyping results obtained by the oligonucleotide microarray were identical with those of PCR-SBT and PCR-SSPs, at a low-resolution, 2-digit level. Therefore, this microarray method for genotyping HLA constitutes a rapid, simultaneous, and high-throughput method that can be used as an alternative to current methods.

Coupled Motion Simulation of the Mobile Harbor and Anti-Rolling Devices in Waves

윤현규,류재문,문석준,정태영,강주년 한국항해항만학회 2010 한국항해항만학회지 Vol.34 No.4

The Mobile Harbor(MH) is a new transportation platform that can load and unload containers to and from very large container ships in the sea. This loading and unloading by crane can be performed with only very small movements of the MH in waves because MH is operated outside of the harbor. For this reason, an anti-rolling tank(ART) and an active mass driving system(AMD) were designed to reduce MH’s roll motion, especially at the natural frequency of MH. In the conceptual design stage, it is difficult to confirm the design result of theses anti-rolling devices without modeling and simulation tools. Therefore, the coupled MH and anti-rolling devices’ dynamic equations in waves were derived and a simulation program that can analyze the roll reduction performance in various conditions, such as sea state, wave direction, and so on, was developed. The coupled equations are constructed as an eight degrees of freedom (DOF) motion that consists of MH’s six DOF dynamics and the ART's and AMD’s control variables. In order to conveniently include the ART’s and AMD’s control dynamics in the time domain, MH’s radiated wave force was described by an impulse response function derived by the damping coefficient obtained in the frequency domain, and wave exciting forces such as Froude-Krylov force and diffraction force and nonlinear buoyancy were calculated at every simulation time interval. Finally, the roll reduction performances of the designed anti-rolling devices were successfully assessed in the various loading and wave conditions by using a developed simulation program

Planar Motion Mechanism Test of the Mobile Harbor Running in Design Speed in Circulating Water Channel

윤현규,강주년 한국항해항만학회 2010 한국항해항만학회지 Vol.34 No.7

Mobile Harbor (MH) is a new transportation platform that can load and unload containers onto and from very large container ships at sea. It could navigate near harbors where several vessels run, or it could navigate through very narrow channels. In the conceptual design phase when the candidate design changes frequently according to the various performance requirements, it is very expensive and time-consuming to carry out model tests using a large model in a large towing tank and a free-running model test in a large maneuvering basin. In this paper, a new Planar Motion Mechanism(PMM) test in a Circulating Water Channel (CWC) was conducted in order to determine the hydrodynamic coefficients of the MH. To do this, PMM devices including three-component load cells and inertia tare device were designed and manufactured, and various tests of the MH such as static drift test, pure sway test, pure yaw test, and drift-and-yaw combined test were carried out. Using those coefficients, course-keeping stability was analyzed. In addition, the PMM tests results carried out for the same KCS (KRISO container ship) were compared with our results in order to confirm the test validity

자세제어장비를 장착한 선박의 파랑중 운동 모델링 및 시뮬레이션

윤현규,이경중,이창민 한국항해항만학회 2004 한국항해항만학회지 Vol.28 No.4

Wave exciting force and moment generate the motions of a ship in waves. Since ship motion exerts the negative influences on a crew's operability, the safety of cargos, passenger's comfort, etc, the anti-rolling devices may be required to reduce such motion. In this paper, the dynamics of the anti-rolling devices such as passive and active moving weight stabilizer and anti-rolling tank, and fin stabilizer are mathematically modeled. While the effect of the motion of the anti-rolling device on a ship was taken into consideration in roll mode only in the past, the 6 DOF coupled equations of motion between a ship and the anti-rolling devices are constituted. Finally the motion of a ship with anti-rolling devices in waves is simulated through the developed simulation program. 파도에 의한 힘과 모멘트는 운항하는 선박에 운동을 발생시킨다. 이러한 운동은 승무원의 작업 능률 저하, 화물의 안전 및 승선감 등에 영향을 주게 되어 안전 운항 저해 요소가 되므로 파도에 의한 운동이 큰 선박들은 자세제어장비(anti-rolling devices)의 장착이 요구된다. 본 연구에서는 수능동의 이동질량안정기(moving weight stabilizer), 감요탱크(anti-rolling tank), 핀스태빌라이저(fin stabilizer)와 같은 자세제어장비의 동적 거동을 수학적으로 모델링 하였다. 기존에는 자세제어장비의 운동을 선박의 횡동요에만 고려한 반면, 본 연구에서는 선박의 6자유도 운동을 모두 고려하여 복합운동방정식을 정립하였다. 마지막으로 자세제어장비를 장착한 선박의 파중 운동 계산 프로그램을 작성하여 시뮬레이션을 수행하였다.

Rapid Species Identification of Elasmobranch Fish (Skates and Rays) using Oligonucleotide Microarray

윤현규,정다금,정인혁,정진욱,오문주,김성,이윤호,김충곤,황승용 한국바이오칩학회 2009 BioChip Journal Vol.3 No.1

Correct identification and classification of fish species is important for conservation and management of the fish resources. However, previous species identification in skates and rays based on morphological similarities and differences is sometimes misleading. All over the world, there are 485 species in Rajiformes. Despite high species diversity, the species in this family share similar morphological features. Therefore, an accurate species identification system is necessary in this family. In the present study, we developed an oligonucleotide microarray for species identification of skates in the waters of Korea. We verified genetic variation of skates by sequence analysis of mitochondrial cytochrome c oxidase subunit I (COI). All microarray results corroborated the species-specific sequences and allowed simple, fast and cost-effective discrimination of large number of samples. These results indicate that the oligonucleotide microarray can be a useful tool for rapid species identification of skates.

파랑중 선박의 운동을 고려한 갑판적 컨테이너의 Securing 및 Lashing 하중 계산 1

윤현규,이경중,양영훈 한국항해항만학회 2005 한국항해항만학회지 Vol.29 No.5

파랑중을 운항하는 선박은 항상 파도의 영향을 받아 운동을 하게 된다. 특히 컨테이너선과 같이 갑판위에 화물을 많이 운송하는 선박의 경우에는 여러 방향의 운동형태 중에서 횡동요가 화물의 안전에 가장 큰 영향을 미친다. 이러한 선박에서는 컨테이너의 이동 및 전도를 방지하기 위하여 Securing과 Lashing을 하게 되는데, 적절한 시스템의 선정을 위하여 각각에 작용하는 하중들의 정확한 평가가 요구되고 있다. 따라서 본 논문에서는 갑판적 컨테이너들의 연결부에 작용하는 Securing 하중과 Lashing 와이어에 작용하는 힘에 대한 계산식을 유도하고, 몇 가지 Lashing 패턴에 대하여 계산을 수행하였다. A ship runs with various modes of motion due to waves. Among the modes, roll mainly influences on the safety of cargos on the deck of container ship. In order to protect cargo shifting and turning, securing and lashing system are generally installed. In that case, it is necessary that the force and moment at the connection point of containers should be estimated. Therefore we derived mathematical equations to calculate the forces of securing points and lashing wires. Also we calculated those forces and moments about various lashing patterns.

Coupled Dynamic Simulation of a Tug-Towline-Towed Barge based on the Multiple Element Model of Towline

윤현규,김연규 한국항해항만학회 2012 한국항해항만학회지 Vol.36 No.9

Recently, tug boats are widely used for towing a barge which transports building materials, a large block of a ship, offshore crane, and so on. In order to simulate the dynamics of the coupled towing system correctly, the dynamics of the towline should be well modeled. In this paper, the towline was modeled as the multiple finite elements, and each element was assumed as a rigid cylinder which moves in five degrees of freedom except roll. The external tension and its moment acting on each element of the towline were modeled depending on the position vector’s direction. Tugboat’s motion was simulated in six degrees of freedom where wave and current effects were included, and towed barge was assumed to move in the horizontal plane only. In order to confirm the mathematical models of the coupled towing systems, standard maneuvering trials such as course changing maneuver, turning circle test and zig-zag test were simulated. In addition, the same trials were simulated when the external disturbances like wave and current exist. As the result, it is supposed that the results might be qualitatively reasonable.

소형모터보트 조종 시뮬레이터 운동수학모형 개발

윤현규,전명준,남유철 한국항해항만학회 2017 한국항해항만학회 학술대회논문집 Vol.2017 No.춘계

수중모함에서 사출되는 고속 수중운동체의 초기 거동 모델링 및 시뮬레이션

윤현규,조현진,Yoon, Hyeon Kyu,Cho, Hyeonjin 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.2

Heavy-weight high speed underwater vehicle(HSUV) is launched from the submerged mother ship. For the safety point of view, it is important to confirm whether the HSUV would touch the launching mother ship. In this paper, the hydrodynamic force and moment were modeled by the polynomials of motion variables and the simple lift and drag acting on a plate and cylinder which consist of the HSUV's several parts. The mother ship was assumed as the Rankine half body to consider the flow field near the moving ship. Such hydrodynamic force and moment were included in the 6 DOF equations of motion of the HSUV and the dynamic simulations for the various conditions of the HSUV until the propeller activation were performed. Developed simulation program is expected to reduce the number of expensive sea trial test to develop safety logic of the HSUV at the initial firing stage.