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오승규(SeoungKyu Oh),김종현(JongHyun Kim),장철섭(ChulSup Jang),황영택(YeongTaik Hwang),이원(Won Yi) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Application of bonding by adhesives can be found in many industries, particularly in advanced technological domains such as aeronautical and space, automobile and electronics industries. Periodic inspection with conventional ultrasonic NDE techniques is capable of indicating the presence and possible location of crack. Continuous ultrasonic attenuation monitoring has potential to supply information. This article discusses the use of pulse-echo ultrasonic testing for the inspection of adhesive bonds between metal sheets. The method is based on the measurement of the reflection coefficient at the metal/adhesive interface. By means of a control experiment it is shown that Quantitative Nondestructive Evaluation in Adhesive Joints are evaluated together with Ultrasonic Testing and Fracture Testing.
HBB(Hydraulic Brake Boost) 기능이 포함된 차량의 제동성능 평가
김원욱(Wonwook Kim),오승규(Seoungkyu Oh),최재신(Jaesin Choi) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Recently, a few of safety function is more active interaction in dangerous situation to prevent accident. HBB(Hydraulic Brake Boost) is one of additional function of EBCM(Electronic Brake Control Module) to compensate brake performance on lack of vacuum condition in brake booster. When the vacuum of brake booster is not enough due to mechanical fault, repetitive pedal apply, lack of engine power and etc., HBB system support to have enough brake performance. Also in the suddenly acceleration accident situation, it was several issued on mass media, HBB will be help to compensate brake performance a lack of vacuum in booster due to engine overload. In vehicle, engine supplied the vacuum to brake booster. However in the full throttle situation, all of engine capability use to increase vehicle acceleration. Then the vacuum of brake booster was lack and vehicle couldn’t have enough brake performance. In the paper, HBB system was evaluated on several vacuum condition. It was so dangerous test on lack of vacuum condition on real vehicle test. For that reason, HIL(Hardware Inthe-Loop) simulation was used to evaluated to avoid potential accident. Also it was easy to control the vacuum of brake boost in HIL simulator. The level of vacuum was seperated 3 level (normal, low, no vacuum) to evaluate brake performance by comparison HBB system was applied and not applied.
HIL Simulator를 이용한 Active UCC 시스템 평가
노지훈(Jihoon Roh),이강원(Kangwon Lee),오승규(Seoungkyu Oh),이종일(Jongil Lee),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Active Unified Chassis Control(AUCC) system is developed for the improvement of the vehicle dynamics performance not only stability but also ride comport. Test for the evaluation of AUCC performance using real vehicle is time consuming and required much cost. Therefore, many evaluation processes are replaced by laboratory test such as Hardware in the Loop Simulation (HIL Simulation). HIL simulation is the computer simulation include real hardware control unit in simulation loop. It is useful tool to test and validate these controllers in phase of development. This paper is shown overall description of HIL simulator for evaluation of AUCC system and test result compare with physical vehicle test result. First, vehicle dynamics modeling and correlation process are explained in detail and then the design concept of HIL simulator is described. Finally, the evaluation procedure and simulation results are presented.