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류동석(Dong-Seok Ryu),김기찬(Ki-Chan Kim),김윤현(Youn-Hyun Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
Variable Reluctance(VR) resolver is widely used in automotive industry as rotor position sensor. VR resolver generates output signal of SIN, COS. these signals are converted to position angle through Resol ver-to-Digital Converter(RDC). This paper deals with the Resolver-to-Digital Converter(RDC) algorithm for position angle. The proposed method does not require much time and increases the accuracy of position angle.
디지털 TV EPG 사용자 요구 기능 도출 및 워킹 프로토타잎 개발
박지수,이우훈,류동석,Park, Ji-Su,Lee, U-Hun,Ryu, Dong-Seok 대한인간공학회 2004 大韓人間工學會誌 Vol.23 No.2
Multichannel on digital TV not only gave opportunities to the TV audience to view a wide range of programs. but also made it difficult for them to search for the program which they plan to view among over 1000 programs broadcasted on more than 100 channels. In this paper the functions of EPG (Electronic Program Guides) required by the users on digital TV were derived from the systematic analysis of multichannel viewing situations. In the situation analysis the situations where they viewed programs on more than 100 channels were generated systematically and the viewing processes in those situations were analyzed to identify user needs and derive the required functions of EPG. We surveyed the viewing behavior of the audience who subscribed to a digital satellite broadcast. SkyPerfecTV. in Tokyo. Japan. The purpose of the survey was to verify the validity of the functions derived from the situation analysis and to identify hidden user needs which were difficult to in the situation analysis. The functions were implemented on a working prototype of EPG based on a digital TV simulator which broadcasts 500 programs on 100 channels and can be controlled by three working prototypes of personal remote controllers. The working prototype will be used in Participatory Design to make it possible for the users to experience and verify the usefulness of the required functions of EPG and also find problems in user interface design of EPG
가변 릴럭턴스 레졸버의 해석과 위치 신호의 비선형성 시뮬레이션 연구
황수진(Su-Jin Hwang),류동석(Dong-Seok Ryu),김기찬(Ki-Chan Kim),김윤현(Youn-Hyun) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Variable reluctance(VR) resolver is widely used as a position sensor in an application of electric vehicle. VR resolver detects absolute angle of rotor position of electric motor. In the paper, analysis method of VR resolver including resolver-to-digital converter (RDC) is proposed by using finite element method (FEM). It is possible to analyze position errors from RDC and VR resolver by proposed method.