http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
류기탁(Ki-Tak Ryu),이윤형(Yun-Hyung Lee),안종갑(Jong-Gap Ahn),이상태(Sang-Tae Lee),소명옥(Myung-Ok So) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
This paper suggests the design method of fuzzy-based LQ controller and interpolation-based LQ controller. The former is combined with fuzzy membership function after completing design of sub-LQ controllers. The latter is accomplish by getting the final controller gain which is interpolated with each gain of sub-LQ controllers. The proposed methods are applied to an inverted pole system. The performance of the proposed schemes are demonstrated through a set of simulation.
류기탁(Ki-Tak Ryu),이윤형(Yun-Hyung Lee),안종갑(Jong-Gap Ahn),이상태(Sang-Tae Lee),소명옥(Myung-Ok So) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
This paper suggests the design method of fuzzy-based LQ controller and interpolation-based LQ controller. The former is combined with fuzzy membership function after completing design of sub-LQ controllers. The latter is accomplish by getting the final controller gain which is interpolated with each gain of sub-LQ controllers. The proposed methods are applied to an inverted pole system. The performance of the proposed schemes are demonstrated through a set of simulation.
류기탁(Ki-Tak Ryu),이윤형(Yun-Hyung Lee),유희한(Heui-Han Yoo),소명옥(Myung-Ok So),정은석(Eun-Seok Jeong) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
This paper suggests to design method of the lnterpolation-LQ controller that is accomplish by getting the [mal controller gain which is interpolated with each gain of sub-LQ controllers. The lagrange interpolation method is used in the scheme. The proposed controller design methods is applied to an Inverted pole system.
고전압 전기추진선박의 AC DRIVE 교육 내용에 관한 연구
류기탁(Ki-Tak RYU),이윤형(Yun-Hyung LEE) 한국수산해양교육학회 2021 水産海洋敎育硏究 Vol.33 No.6
As the regulation of exhaust gas emitted from ships has been strengthened and maritime autonomous surface ship has become a global issue, electrical propulsion ships that use high voltage and are easy to maintain are in the spotlight. In addition, according to the Eco-Friendly Vessel Act, new government-run ships will be built with electrical propulsion system. Because this system is unfamiliar to the existing seamen, ship managers, and those related to autonomous ships, it is essential to develop a training course. Since the AC drive(power conversion device) is the most important device, the contents of training model should focus on the operation and maintenance of this device. For this, first we review domestic and foreign laws, regulations including the STCW convention, IMO model course and manufacturers training course. Finally, in this paper, we propose a AC drive training model and contents for high voltage electrical propulsion ships.
능동 슬라이딩 모드 제어기를 이용한 변형된 Lorenz 카오스 동기화
류기탁(Ki-Tak Ryu),이윤형(Yun-Hyung Lee) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.7
카오스는 비선형 과학 분야에서 매우 중요한 주제 중의 하나이며, Lorenz가 처음으로 소개한 이후 집중적으로 연구되어지고 있다. 카오스 시스템의 한 특성은 카오스 시스템에 의해 생성된 신호는 다른 어떤 시스템과 동기화되지 않는다는 것이다. 따라서 두 카오스 시스템은 서로 동기화되는 것이 불가능한 것처럼 보이지만, 만약 두 시스템이 적절한 방법으로 정보를 교환한다면 이 두 시스템은 동기화가 가능하다. 본 논문에서는 능동 제어와 슬라이딩 모드 제어, 그리고 리아프노프 안정도 이론을 기반으로 하는 변형된 Lorenz 카오스 시스템의 동기화 문제에 대해 다룬다. 동기화를 위해 고려한 기법은 선형상태 오차 변수에 의해 짝을 이룬 구동시스템과 응답시스템으로 구성된다. 이를 위해 우선 대상 카오스 시스템에 대해 간단히 살펴본다. 다음으로 능동제어, 슬라이딩 모드 제어 기법을 이용한 카오스 시스템의 동기화와 채터링 문제를 해결하기 위한 제어 방법을 도출한다. 전체 폐루프 시스템의 점근적 안정도는 리아프노프 안정도 이론에 의해 증명한다. 컴퓨터 시뮬레이션은 제안한 방법의 타당성을 확인하기 위해 그래픽으로 제시한다. Chaos is one of the most significant topics in nonlinear science, and has been intensively studied since the Lorenz system was introduced. One characteristic of a chaotic system is that the signals produced by it do not synchronize with any other system. It therefore seems impossible for two chaotic systems to synchronize with each other, but if the two systems exchange information in just the right way, they can synchronize. This paper addresses the problem of synchronization in a modified Lorenz chaotic system based on active control, sliding mode control, and the Lyapunov stability theory. The considered synchronization scheme consists of identical drive and response generalized systems coupled with linear state error variables. For this, a brief overview of the modified Lorenz chaotic system is given. Then, control rules are derived for chaos synchronization via active control and slide mode control theory, with a strategy for solving the chattering problem. The asymptotic stability of the overall feedback system is established using the Lyapunov stability theory. A set of computer simulation works is presented graphically to confirm the validity of the proposed method.