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A study on design and modeling of a Wave Energy Converter
윤종일(Yoon, JongIl),안경관(Ahn, KyongKwan),딩광쪙(Dinh, Quang Truong),황후티엔(Hoang, Huu Tien) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
Motions in nature, for example ocean wave, has been playing a significant role for generating electricity production in our modern life. This paper presents an innovative approach for electric power conversion of the vast ocean wave energy. Here, a floating-buoy wave energy converter (WEC) using hydrostatic transmission (HST), which is shortened as HSTWEC, is proposed and designed to enhance the wave energy harvesting task during all wave fluctuations. In this HSTWEC structure, the power take-off system (PTO) is a combination of the designed HST circuit and an electric generator to convert mechanical energy generated by ocean wave into electrical energy. Several design concepts of the HSTWEC have been considered in this study for an adequate investigation. Modeling and simulations using MATLAB/Simulink and AMESim are then carried out to evaluate these design concepts to find out the best solution. In addition, an adaptive controller is designed for improving the HSTWEC performance. The effectiveness of the proposed HSTWEC control system is finally proved by numerical simulations.
A New Design of Wave Energy Generator Using Hydrostatic Transmission
안경관(Ahn, Kyoungkwan),딩광졍(Dinh, Quangtruong),윤종일(Yoon, Jongil) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
An innovative design of a floating-buoy wave energy converter (WEC) using hydrostatic transmission (HST), named HSTWEC, is presented in this paper. The system is designed to convert ocean wave fluctuation into electricity by using the HST circuit and an electric generator. Based on the floating-buoy concept, the wave forces the sub-buoy to move up and down. Consequently, the electric power can be obtained from the generator in both the moving directions of the sub-buoy through the HST circuit as shown in Fig. 1. In order to investigate the HSTWEC operations, a mathematical model of the system is indispensible. In addition, the method to control the HSTWEC, including: pump displacement control, tension adjustment control and ballast weight control, is also discussed in this paper. Finally, the design concept as well as simulation results indicated that this HSTWEC design is an effective solution and possible to fabricate for wave energy generation.
조우근(Wookeun Jo),안경관(Kyoungkwan Ahn),윤종일(Jongil Yoon),김동우(Dongwoo Kim),임구(Goo Lim),박재현(Jaehyun Park) 한국자동차공학회 2008 한국자동차공학회 지부 학술대회 논문집 Vol.2008 No.11
This paper is a study on the path-tracking of electronic wheelchair for welfare vehicle and on autonomous driving that vehicles seek for their own position following car. Normal welfare vehicles need an assistant, while those in this paper are designed for the disabled themselves to drive them. So a notion of autonomous driving of electronic wheel chairs and of moving robots is needed. We suggest fuzzy controller in order to control some of all the path planning of electronic wheelchair which is applied to welfare vehicles designed for self driving. And we com pare a capability of PID controller with that of fuzzy controller.