http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
FlexRay Network 설계를 위한 CANdb기반 FIBEX 자동 생성
송영훈(Younghun Song),이석(Suk Lee),이경창(Kyungchang Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Today, an intelligent car requires high level applications such as safety, convenience, and reliability. Owing to the increasing number of ECUs and intelligent functions, many automotive companies have to consider the FlexRay protocol for their in-vehicle networking systems. FlexRay protocol is time-triggered structure, so it is useful for time-critical application such as integrated chassis control system. However, FlexRay protocol requires the complex scheduling skill such as assignment of unique message buffer for each static slot. To assist an automotive engineer in designing the FlexRay network, this paper presents an automatic generation method of FIBEX based on the standardized CAN database. And we evaluated its feasibility using FlexRay network simulation application.
적응적 중간값 필터와 형태학적 기법을 이용한 국부적인 임펄스 잡음 제거
송영훈(Younghun Song),한윤상(Yunsang Han),지정민(JeongMin Ji),박준훈(Joonhoon Park),이상근(Sangkeun Lee) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
We propose a local impulsive noise removal method occurred during image fusion processes. First, we perform median filtering and subtraction between the original and median filtered images. Next, the noisy regions are estimated through morphological operation in the subtracted image. Finally, adaptive median filtering is performed in the estimated noise regions. In order to evaluate the performance of the proposed algorithm, the quantitative measure is defined in terms of the peak signal-to-noise ratio(PSNR). The experimental results showed that the proposed method can significantly remove local impulse noise.
FlexRay 동기화를 위한 플랫폼 생성 파라미터의 설계 및 평가
송영훈(Younghun Song),이경창(Kyungchang Lee),이석(Suk Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Today, an intelligent car requires high level applications such as safety, convenience, reliability. Many automotive companies have chosen the CAN protocol for their in-vehicle networking system such as chassis network system because of its excellent communication characteristics. However, the increasing number of ECUs and the need for more intelligent functions. Recently, FlexRay protocol that is a time-triggered protocol has been introduced. And many automotive companies have been focusing on this protocol. Because It’s reliability and real-time system. However, FlexRay needs correct 53 PCR parameter for synchronization between nodes. This paper presents a design of FlexRay parameter generation S/W and we evaluated its performance using simple H/W test bed.
암반소켓된 소구경 현장타설말뚝의 정재하시험과 양방향재하시험 분석법 비교연구
송명준(Myungjun Song),송영훈(Younghun Song),정민형(Minhyung Jung),박영호(Youngho Park),박재현(Jaehyun Park),이주형(Juhyung Lee),정문경(Moonkyung Chung) 한국지반환경공학회 2013 한국지반환경공학회논문집 Vol.14 No.9
이 논문에서는 정재하시험과 양방향재하시험의 하중-침하거동을 비교하기 위하여 인접한 위치에서 직경 480mm인 암반에 소켓된 현장타설말뚝을 시공하고 각각 정재하시험과 양방향재하시험을 실시하였다. 양방향재하시험 해석법 중 기존의 탄성압축량을 고려하지 않은 등가하중곡선법은 정재하시험 결과와 비교할 경우 침하량을 과소평가하는 것으로 나타났기 때문에, 정확한 하중-침하 곡선 산정을 위해서는 반드시 탄성압축량을 고려해야 한다. 또한 기 제안된 여러 탄성압축량을 고려한 등가하중곡선법들을 정재하시험 결과와 비교검토한 결과, 충분한 적용성을 가지는 것으로 판단되었다. 또한 정재하시험과 양방향재하시험의 지지력을 비교한 결과, 양방향재하시험은 말뚝재료의 극한강도를 반영하지 못하고 지반의 극한지지력만을 평가하므로 반드시 재료강도에 대한 검토를 실시하여야 한다. In this study, each top-down load test and bi-directional load test has been performed on the 480mm diameter of two rock socketed drilled shafts, which are located next to each other, and the results have been compared. The result shows that the settlement from the equivalent load-settlement curve of bi-directional load test is smaller than one from top-down load test, because elastic is not considered in equivalent load-settlement curve of bi-directional load test. Therefore elastic shortening should be considered to obtain appropriate equivalent load-settlement curve. Three existing methods used to obtain equivalent load-settlement curve with consideration of elastic shortening has been compared with the result of top-down load test. The result shows that those existing methods are sufficiently applicable to the design. In addition, result of comparison between top-down load test and bi-directional load test shows that bi-directional load test was found to overestimate bearing capacity because it does not consider pile body failure.
소프트웨어 복잡도 감소를 위한 노드 기반 FlexRay 스케줄링 기법 개발
김만호(Manho Kim),송영훈(Younghun Song),이석(Suk Lee),이경창(Kyungchang Lee),하경남(Kyongnam Ha) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
As vehicles become intelligent for convenience and safety of drivers, in-vehicle networking (IVN) systems are essential components of intelligent vehicles. Recently, the chassis networking system which require increased network capacity and real-time capability is being developed to expand the application area of IVN systems. Also, FlexRay has been developed for the chassis networking system. However, FlexRay needs a complex scheduling method of static segment, which is a barrier for implementing the chassis networking system. Especially, if we want to migrate from CAN network to FlexRay network using CAN message database that was well constructed for the chassis networking system by automotive vendors, a novel scheduling method is necessary to be able to reduce design complexity. This paper presents a node-based scheduling method for the static segment, to reduce the software complexity in FlexRay network systems. To demonstrate the feasibility of the technique, its performance is evaluated in terms of various software complexity index.
박지훈(Jeehun Park),송영훈(Younghun Song),이상협(Sanghyob Lee),이경창(Kyungchang Lee),이석(Suk Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Recently, unmanned vehicle such as AGVs(Automatic Guided Vehicles), OHTs(Overhead Hoist Transfers) are widely used in logistic industrial system. This paper focuses on the feasibility of CAN based distributed control network for active unmanned forklift. An active unmanned forklift has many electronic control units(ECU) that link sensor with actuators to handle intelligent function. The increasing number of electronic control units, sensors, and actuators in active unmanned forklift, and the increasing need for more intelligent functions requires a network with increased capacity and real-time capability.