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지영춘(Youngchun Ji),전남일(Namil Jeon),서원진(Wonjin Seo),두민수(Minsoo Doo),정인승(Inseung Chung) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently automotive company demands supplier to provide goods as a module unit, Automotive company presents some requirements for a modular assembly and supplier delivers modules satisfying those requirements. This trend requires the development of methods to predict the performance of modules in the vehicle environment. The development of assembled analytical models that reflect the interactions between components within a modular assembly is necessary to insure that a module is properly designed. This paper describes the construction of the finite element model to investigate the structural requirements for Damper Spring Module(DSM) as installed in a McPherson strut front suspension. The analytical model is constructed as the 1/4 car. The modeling techniques to construct the components within DSM are presented. Results of the structural analysis under some loading conditions are displayed. Additionally, some aspects to be observed in the assembly model are considered.
지영춘(Youngchun Ji),정인승(Inseung Chung),전남일(Namil Jeon),윤기현(Kihyun Yoon),심정수(Jeongsoo Shim),최승렬(Seungryul Choi) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Brake judder in automotive vehicle is defined as low frequency vibration around 20Hz caused by disc thickness<br/> variation of disc brake. This paper is focused on developing simulation model to analyze the transfer pass of brake<br/> judder phenomenon of chassis system, which is composed of suspension, steering, brake systems. A dynamic model<br/> of half car system was constructed with ADAMS software and validated by experimental data in chassis dynamometer<br/> test.
HILS Rig 시험을 통한 실차 ABS 실내작동소음 예측 기법에 대한 연구
김승환(Seunghwan Kim),육지용(Jiyong Yook),한민규(Mingyu Han),전남일(Namill Jeon) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10
The psychoacoustic quality of ABS is now considered more important than before as the focus of recent ABS function is expanded to basic function from typical emergency function. Thus, the automotive parts manufacturing companies are actively working to improve NVH (Noise, Vibration, and Harshness) in ABS module. In terms of time, test place, and cost, however, it is very inefficient to have all the operating noise validation test in real vehicle configuration especially for partially improved ABS module. To contribute to reducing the development period and to grasping the improvements faster, this research presents the study of a correlation to predict ABS operating noise inside vehicle via HILS rig test. The regression equation in this paper was statistically drawn from using Minitab S/W, and based on that equation, the noise spectrum of vehicle interior was analogized.
전자식 주차 브레이크 작동소음 개발 목표 설정을 위한 전달경로분석법의 적합성 연구
정현범(Hyun Bum Jung),이재용(Jae Yong Lee),한민규(Min Gyu Han),전남일(Namil Jeon) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10
Transfer Path Analysis (TPA) is commonly used, by car makers and parts suppliers, analysis process to root the cause of NVH problems. In general, TPA is an analyzing technique to find the contributing factors of noise/vibration problems, and their transfer path in vehicle. However, not only TPA is used to analyze the source of NVH problems but also is used to predict NVH performance prior to the proto vehicle, or to set the development target for next new vehicle. Automotive parts manufacturing companies have to set NVH performance target when developing new systems just as car makers have NVH target set for new vehicle. Nevertheless, most of components are currently being developed based on subjective evaluation without an objective target. To judge the suitability of using TPA to set NVH target of electric parking brake, this research analyzed the transfer path by setting them in two points of view; Chassis Module and Electric Parking Brake, and comparing the measured value and calculated value. From this result, NVH target of electric parking brake will be approached in level of vehicle, system and component.
콰이어트 가진기를 이용한 전자식 주차 브레이크 작동소음 시뮬레이션 기법 연구
한민규(Mingyu Han),김승환(Seunghwan Kim),이재용(Jaeyong Lee),전남일(Namill Jeon) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Recently, as an application of EPB(Electronic Parking Brake) system, especially a motor-on-caliper(MoC) type, in the vehicles has been broadened, drivers’ complaint about operating noise of EPB has been larger. This paper focuses on not only the NVH characteristics between the 1<SUP>st</SUP> and 2<SUP>nd</SUP> generation of MoC, but also the simulation method using a quiet shaker without a MoC assembly. New simulation method shows good test results between vehicle test with a MoC sample and vehicle simulation test without a MoC sample using a quiet shaker. And this method will be a good simulation tool for noise design in the step of developing MoC.