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모바일 증강현실 서비스 구현을 위한 5G 무선 액세스 네트워크 구조
조형준,정종문,Cho, Hyoungjun,Chung, Jong-Moon 한국인터넷정보학회 2017 인터넷정보학회논문지 Vol.18 No.4
In this paper, the analysis of mobile augmented reality service using 5G network are provided. First of all, the introduction and required performance of mobile augmented reality(MAr) service are provided. After that, 5G network key features, target performance, and network architecture are analyzed. At the end, the additional network entity and functions for the realization of mobile augmented reality service are proposed. The mobile augmented reality service time. At the end, the service delay in existing LTE system and proposed 5G MAr system by using real device and network parameters. 본 논문에서는 5G 네트워크를 활용하여 모바일 증강현실을 구현하기 위한 조건들을 제시한다. 이를 위하여 모바일 증강현실 서비스 개요와 요구 성능, 그리고 5G 네트워크의 현재 상황과 성능, 구조 등에 대해 소개하고, 모바일 증강현실 서비스 구현을 위한 5G 액세스 네트워크 추가 엔티티 및 기능들을 제안한다. 실제 디바이스와 네트워크 파라미터들을 활용하여 기존의 LTE 시스템과 제안된 5G 모바일 증강현실 시스템에서의 서비스 지연 시간을 분석한다.
[동력전달계부문] 구면무단변속기를 장착한 하이브리드 차량의 개발
조형준(Hyoungjun Cho),김정윤(Jungyun Kim),전순일(Soonil Jeon),이장무(Jangmoo Lee),김재열(Jaeyu Kim),박영일(Yeongil Park) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, we introduce the Semi-Spherical CVT(SS-CVT), which is characterized by its simple structure, infinite torque multiplication feature, and specific operating principles, with a kinematic analysis. The SS-CVT transmits the power using the rolling resistance between the metal on metal currently and realizes the smooth transitions between the forward/ neutral/ reverse states of output shaft by manipulating only one shifting actuator without a clutch. Using these special features of SS-CVT, we propose a prototype Hybrid vehicle equipped with a DC motor as a complementary power source. To build the prototype vehicle, we present the design processes and numerical investigations of its capabilities in this study.
조형준(HyoungJun Cho),문상훈(SangHoon Moon),김기남(KiNam Kim),이기상(KiSang Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Interior permanent magnet synchronous motor (IPMSM) is widely and mainly applied for the traction motor in the hybrid electric vehicle (HEV) due to high efficiency, high power density and wide speed range. HEV traction motor design must correspond ultimately in fuel efficiency improvement goal of the vehicle, and that is achieved by high efficiency performance at the most frequently used area during vehicle hybrid operation control strategy. In this paper design related to increase of power density and efficiency at most frequently used area of IPMSM is presented.
[동력전달계] 무단변속기 장착 차량의 커플링 기부별 발진 성능 해석
김정윤(Jungyun Kim),조형준(Hyoungjun Cho),이장무(Jangmoo Lee),임원식(Won Sik Lim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
To reduce the drive-line torsional vibration, some torsional coupling devices were used for the passenger car equipped a CVT with the wet type multi-plate clutch as a starting device. This paper describes the behaviors of a passenger car using a Belt-type CVT (Continuously Variable Transmission) that has different torsional coupling devices: a solid mass flywheel with torsional damper and a dual mass flywheel, focusing in the launching characteristics. The launching characteristics, considered here, are the acceleration performance and the creep characteristic. By using the mathematical models of this systems, the launching characteristics for different types of torsional coupling devices were investigated through the driving simulation, which developed in the previous study.
문상훈(SangHoon Moon),김정식(JungShik Kim),조형준(HyoungJun Cho),김연호(YeonHo Kim),김기남(KiNam Kim),김명규(MyungKyu Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Interior permanent magnet synchronous motor (IPMSM) is widely and mainly applied for the traction motor in the hybrid electric vehicle (HEV) due to high efficiency, high power density and wide speed range. HEV traction motor design must correspond ultimately in fuel efficiency improvement goal of the vehicle, and that is achieved by high efficiency performance at the most frequently used area during vehicle hybrid operation control strategy. In this paper design related to increase efficiency at most frequently used area of IPMSM and to decrease whine noise when regeneration braking is presented.