전차 Dimension 예측에 관한 방법론

양동순,Yang, Dong-Soon 한국국방경영분석학회 1978 한국국방경영분석학회지 Vol.4 No.1

전차의 Dimension은 다음과 같은 전차의 기능에 영향을 미친다. 즉 Firepower, Mobility, Armorthickness and Target detection Instrument등, 이들은 서로 상관성을 가지고 있다. 승무원(crew)을 보호한다고 하며 지나치게 장갑(thickness)에 중점을 두면 전차의 속도가 감소되여 적의 대전차포에 취약해지며 기습적인 기동력을 발휘하지 못한바. 반면에 공격적인 기동력을 중요시하며 속도에 치중한다면 Engine의 크기가 커지며 그 원인은 전차의 크기를 더하여 좋은 Target의 대상이 된다. 여기에서 한가지 예를 들었지만 이러한 상관관계는 많이 존재하며 이러한 약점을 제거하고서도 좋은 전차를 설계하는 것이 목적이다. 좋은 Horse Power를 내면서도 재래식 Engine 보다 Engine의 크기를 작게하는 방법은 없을까? 하는 점을 여기서 엿볼 수 있다. 시간과 예산을 절약하려면 생산전에 충분한 Disign과 연구가 필요함을 강조하고 있다.

가변 수주진동장치를 이용한 고효율 파력발전에 관한 연구

양동순(Dong-Soon Yang),조병학(Byung-Hak Cho) 한국해양공학회 2009 韓國海洋工學會誌 Vol.23 No.5

The results of a simulation study of variable liquid column oscillations in U-tanks with a novel control scheme are presented. The configuration under investigation is analogous to that of the tuned liquid-column damper used to suppress oscillatory motion in large structures like tall buildings and cargo ships. However, by virtue of an adequate controller, the response of amplitude of the U-tanks becomes larger in a desired frequency range. The motion of wave energy conversion system equipped with a variable liquid column oscillator is described by a series of nonlinear differential equations. The equations describe the motion of body under ocean wave excitation, and the motion of liquid with an air-spring effect caused by the compression and expansion of air in vertical liquid columns and air chambers. It is shown that the effect of the air-spring has a vital role to maintain the natural frequency of oscillation in the system to synchronize with the frequency of the ocean wave, thus the system provides the most effective mode for energy extraction from the ocean.

50kW급 가동물체형 고효율 파력발전시스템 설계

조병학,양동순,박신열,최경식,박병철 한국수소및신에너지학회 2011 한국수소 및 신에너지학회논문집 Vol.22 No.4

A 50 kW class rotating body type wave energy converter consisted of two floating bodies and a PTO (Power Takeoff) unit is studied. As an wave energy extractor, the body is designed to have a VLCO (Variable Liquid-Column Oscillator) having a liquid filled U-tube with air chambers. Owing to the oscillation of the liquid in the U-tube caused by the air spring effect of the air chambers, the amplitude of response of the VLCO becomes significantly amplified for a target wave period. The PTO converts the rotational moment introduced from the relative motion of the hinged bodies to an hydraulic power by means of a cylinder. A high pressure accumulator, hydraulic motor and a generator are equipped in the PTO to convert the hydraulic power to electric power. A control law for adjusting the oscillation period of the VLCO is proposed for the efficient operation of the VLCO with various wave conditions. It is found that the effect of the air spring has an important role to play in making the oscillation of the VLCO match with the ocean wave. In this way, the wave energy converter equipped with the VLCO provides the most effective mode for extracting energy from the ocean wave.

50kW급 동체회전형 파력발전시스템 유압식 전력변환장치 개발 및 성능시험

최경식,양동순,박신열,조병학 한국기계기술학회 2011 한국기계기술학회지 Vol.13 No.3

50kW급 동체회전형 파력발전시스템(WEC;wave energy converter)의 전력변환장치(PTO; power take-off)를 설계 제작한 후 성능시험을 하였다. 파력발전시스템은 2개의 실린더형 동체가 회전관절로 연결된구조로 수면의 반정도 잠기는 구조로 되어있다. 파랑에 의해 유도된 회전관전의 움직임이 유압실린더에 힘을 가해주며, 유압실린더는 고압의 작동유를 축압기를 경유하여 발전기에 체결된 유압모터로공급한다. 유압식 PTO은 유압실린더가 왕복운동하는 움직임을 이용하여 고품질의 전력을 생산하는데 효과전인 수단을 제공한다. 파력발전시스템의 경제성은 PTO의 에너지 변환 효율에 크게 의존한다. 발전기를 AC 380V 전력계통에 연계시킨 후, 발전기에서 나오는 출력이 5, 20, 35, 43kW 일때PTO 전체와 개별기기에 대한 효율을 측정하였다. 본 논문에서 유압식 PTO시스템의 설계에 대해 설명하였으며 효율 향상에 초점을 맞추어 PTO 성능대해 분석하였다.

제40차 춘계학술대회 : 포스터 전시 연제 ; 화폐상 수장족저 각화증

송동훈,양동순,방동식 대한피부과학회 1988 초록집 Vol.26 No.20

Design and Performance Test of Hydraulic PTO for Wave Energy Converter

최경식,양동순,박신열,조병학 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.

A PTO (power take-off) system for 50kW class rotating body type WEC (wave energy converter) has been designed,constructed and tested. The WEC has a semi-submerged, articulated structure composed of two cylindrical body sections linked together by a hinge joint. The wave-induced motion of the joint is resisted by a hydraulic cylinder, which pumps highpressure oil to PTO system having a generator-coupled hydraulic motor and a smoothing accumulator. The hydraulic PTO provides an efficient way for generating high quality electric power from the reciprocating motion of the cylinder. The economic viability of a WEC largely depends on the energy conversion efficiency of its PTO. The efficiency of the overall PTO system and individual parts are measured at the 5, 20, 35 and 43kW of generator power while the generator is tied to the commercial 380Vac grid. In this paper, the design of a hydraulic PTO is presented, and the performance of the PTO is discussed.

추계학술대회 : 일반연제 ; 광화학요법 : 피부에서 8-methoxypsoralen 농도 측정에 관한 연구 - 혈중농도와 피부농도간의 관계 -

김형주,박윤기,양동순,조태홍 대한피부과학회 1987 대한피부과학회 학술발표대회집 Vol.39 No.2

화폐상 수장족저 각화증

송동훈(Dong Hoon Song),양동순(Dong Soon Yang),방동식(Dong Sik Bang) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.6

A case of 39-year-old male with keratosis palmoplantaria nummularis was reported. The skin lesions were characterized by the presence of painful focal keratoses on the plantar pressure points. Biopsy of a keratotic plantar lesion revealed excessive hyperkerstosis, hypergranulosis, focal hypogranulosis, and acanthosis in the epidermis. We could observe aymptomatic relief of this patient who was treated with mixture of corticosteroid, 25% urea and 2.5% salicylic acid.

Development of Performance Demonstration Programs for Eddy Current Data Analysiss

조찬희,이희종,남민우,양승한,양동순 한국비파괴검사학회 2005 한국비파괴검사학회지 Vol.25 No.3

The Korea Electric Power Research Institute (KEPRI) has developed performance demonstration programs for non-destructive testing personnel who analyze ECT(eddy current testing) data for steam generator tubing since 2001. The purpose of these performance demonstration programs is to ensure a uniform knowledge and skill level of data analysts and contribute to safe operation of nuclear power plants. Many changes have occurred in non-destructive testing of steam generator tubing such as inspection scope, plugging criteria and qualification requirements. According to the Notice 2004-13 revised by the Ministry of Science and Technology (MOST), the analyst for steam generator tubing shall be qualified as the qualified data analyst (QDA), and the site specific performance demonstration (SSPD) program shall be implemented. KEPRI developed these performance demonstration programs and they are being successfully implemented. The analyst's performance is expected to be improved by the implementation of these programs.

초음파검사자 기량검증 체제를 위한 다자비교시험

윤병식,양승한,김영호,김용식,양동순 한국비파괴검사학회 2004 한국비파괴검사학회지 Vol.24 No.4

국내 원자력발전소의 Class1과 Class2 배관검사에 적용할 수 있는 초음파탐상 검사자, 장비 그리고 절차서에 대한 한국형 기량검증(KPD) 시스템을 구축하였다. PD 방법을 적용한 검사결과와 전통적인 dB-drop 방법을 이용한 검사결과를 상호 비교하기 위하여 Round Robin Test(RRT)를 수행하였다. RRT 결과는 PD 방법의 신뢰성이 dB Drop 방법보다 우수한 것으로 나타났다. 이러한 결과로부터 원자력발전소 가동중검사에 PD 방법을 적용함으로써 초음파탐상검사 결과의 신뢰성이 더욱 향상될 것으로 기대된다. The Korean Performance Demonstration(KPD) System for the ultrasonic testing personnel, equipments and procedures applicable to the Class 1 and 2 piping examination for nuclear power plant in Korean has been established. A round robin test was conducted in order to compare the examination results by the method of Performance Demonstration(PD) with the traditional dB-drop method. As a result, adoption of the PD method to the in-service inspection of the nuclear power plants will improve the reliability of the ultrasonic test results.