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양면형 태양광발전 소자의 성능변수 및 이에 대한 정확한 측정방법
안승규(Seungkyu Ahn),안세진(SeJin Ahn),어영주(Young Joo Eo),유진수(Jinsu Yoo),박주형(Joo Hyung Park),김기환(Kihwan Kim),조아라(Ara Cho),조준식(Jun-Sik Cho),윤재호(Jae-Ho Yun),신동협(Donghyup Shin),정인영(Inyoung Jung),곽지혜(Jihye Gwak) 한국태양광발전학회 2017 Current Photovoltaic Research Vol.5 No.3
We have examined the issues on the measurement of bifacial photovoltaic(PV) devices that should be considered in order to ensure a measurement accuracy beyond a certain level and the comparability between the bifacial PV devices. Based on the results of various experiments and previous studies, solutions for these measurement issues are suggested. The most significant technical issues in the performance measurement of the bifacial PV devices are 1) elimination of the effect due to the light reflection on the sample holder surface and 2) the measurement of the expected power generation gain in outdoor operation. The effect due to the light reflection on the sample holder surface can be eliminated by using an anti-reflective sample holder. In case of a reflective sample holder, if the bifacial device have a linear characteristic with respect to the irradiance of incident light, it has been confirmed (through some previous studies and additional experiment) that exact measurement results can be obtained by the correction of the measurement data. In addition, it was also confirmed that the expected power generation gain in the outdoor operation can be obtained by three different methods along with the basic concepts of the bifaciality coefficient, the albedo, and the effective front irradiance.
Development of HIL Simulator for UCC System
SeungKyu Oh,Kangwon Lee,Jihoon Roh,Myungchul Jung,Youngwoo Kim,Jinhyun Ahn,Hyoungsoo Kim,Jinhee Jang 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In these days, most of all motor companies are trying to reduce development time and cost. They use a lot of ways to solve these problems. One of the solutions is a HIL (Hardware-In-the Loop) Simulator. In this paper, HIL Simulator which is consistent with GMDAT RLM (Road to Lab to Math) Strategy is proposed. And this HIL Simulator is developed to be suitable for UCC (Unified Chassis Control) system development. The important advantages of HIL Simulator are that it can be possible to substitute road tests by virtual tests and to modify the control algorithm easily. In this UCC system, AFS (Active Front Steering) system and Air Suspension system is integrated in ESC (Electronic Stability Control) system. It is revealed that UCC system which includes AFS system, ESC system and Air suspension system has quite obviously a lot of synergy among the chassis control subsystems by previous studies. To develop UCC HIL Simulator, there are several steps. There are target vehicle modeling. vehicle model verification, configuration of S/W & H/W and application. Using this HIL Simulator, it can be easily develop, evaluate and validate control algorithm and H/W performance. And subjective and objective tests can be possible using steering system and brake system H/W, additional equipments and CarSim & MATLAB/Simulink® S/W. Finally, using this HIL Simulator, it can be achieved UCC system efficiently.
T-S Fuzzy Control of IPMSM Using Backstepping Integral Sliding Mode
Seungkyu Park,Taesung Yoon,Gunpyung Kwak,Hokyun Ahn 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
This paper aims to design a robust controller for the Interior Permanent Magnet Synchronous Motor (IPMSM) based on the Takagi-Sugeno (T-S) fuzzy modeling, the sliding mode control(SMC) and the back-stepping control. The introduction of T-S fuzzy model is for the clearer description of nonlinear uncertainties and reduces computational burden, and the back-stepping technique for the considering of the load disturbance under the inevitable matching condition in the SMC. The Integral SMC is used for the problem of reaching phase.
Seungkyu Park,Hokyun Ahn 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
This paper presents a robust T-S Fuzzy controller with a weighted integral action for Permanent Magnet Synchronous Motor which have nonlinear dynamics. The T-S Fuzzy controller is used for the robustness of nonlinear systems and the weighted integral action is used for the improvement of control performance. A T-S Fuzzy controller is designed by combining the local controllers with the overall stability, and LMI(Linear Matrix Inequality)is used to determine the gains of linear controllers. The control performance of PMSM is changed into regulator problem by introducing the integral action and the weighting factor gives flexibility to a T-S fuzzy controller.