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정창현(Changhyun Jeong),정도현(Dohyun Jung),배원락(Wonrak Bae) 한국자동차공학회 2008 한국 자동차공학회논문집 Vol.19 No.6
We presented design methodology of constant velocity joint for passenger cars using design of experiment. On the basis of contact normal stress of internal components of constant velocity joints, we performed a sensitivity analysis of several design parameters. And then we performed robust design and optimization design process. As a result, we could find robust design and also propose the optimized design. Presented design process would be very helpful for engineers who are suffer for new constant velocity joint design.
지능형 자동차용 FOT 데이터베이스에 기반한 한국과 미국 운전자의 주행특성 고찰
정창현(Changhyun Jeong),이영석(Youngseok Lee),최성진(Sungjin Choi),정도현(Dohyun Jung),이강원(Kangwon Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently, automobile has been developed as a fusion technology product with many electronic parts and telematics equipments and many ECUs. Automobiles are becoming more intelligent and safe vehicles, assemblies of advanced technology by customers’ demand. A study on the natural driving pattern and driver"s response in various traffic and road condition is essential to develop the driver friendly intelligent vehicle. We introduced the field operational test (FOT) database, which could be used as driving and road conditions collection for researches about driver friendly intelligent system, Human Vehicle Interface(HVI) system and economic driver model and so on, which has been built by Korea Automotive Technology Institute(KATECH) from 2 years ago. Also, we compared Korean and American driving characteristics based on FOT database. American driving data came from UMTRI(University of Michigan Transportation Research Institute) RDCW(road departure crash warning system) FOT database. We showed macroscopic observation results about driving tendency of both database in this paper and we will present detail analysis results in the close future.
정민지(MinJi Jeong),김진용(Jinyong Kim),정창현(Changhyun Jeong),이영석(Youngseok Lee),정도현(Dohyun Jung) 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5
The most people have some representative prejudices when they are facing women drivers while driving. They tend to associate with female drivers as interrupters who impede the flow of the road. For example, the people who drive too slowly alone, drivers who have frequent sudden stop and a quick start and inexperienced people with changing lanes. In this paper, we have studied deceleration characteristics which is one of drivers' traits according to drivers' gender when they driving on the highway for investigating the truth. For experiments, we recruited twenty men and twenty women patients who are 30~40 years old. Highway is selected as a test course to reduce to a minimum impact from environment Brake Act signals that is transported from vehicles are used to analyze and same a highway and a vehicle are used at the same time. About 20 minutes before starting the test have been adapted to the drivers to get used a test vehicle. Through the result of this study, we would like to identify male and female drivers' deceleration characteristics and reconsider preconceptions about women drives that most people have.
정민지(Minji Jeong),김진용(Jinyong Kim),정창현(Changhyun Jeong),이영석(Youngseok Lee),정도현(Dohyun Jung) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper is research about proactive safety and we have measured driver"s real time position of eye and head by using a camera settled in front of operator (driver) and a eye tracker equipment. Collected data were used to analyze a correlation between driver’s career and gender and its effect on driver’s behavior. Moreover, By calculating standard deviation figure (σ) of driver’s head behavior studied to represent how stable behavior depend on features driver has. This study results will be used to concrete an accident preventative education and be utilized as basic material for design system such as each different warning process following driver’s feature.
가상 교통 시뮬레이션을 이용한 ACC 컨트롤러의 성능 향상에 관한 연구
이영석(Youngseok Lee),정창현(Changhyun Jeong),박정원(Jungwon Park),최성진(Sungjin Choi),정도현(Dohyun Jung) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This study proposed the method to enhance performance of ACC at virtual traffic scenarios with environmental conditions The simulation environment consists of a vehicle dynamics model, the virtual module of ACC system and virtual traffic environment such as road, fellow car, etc. The vehicle model is developed with a veDYNA software. To verify the dynamic performance of the vehicle model, field tests are carried out on the proving ground. Multiform adaptive cruise control system is applied to the virtual module. Fuzzy controller that created in various simulation shows better performance than normal controller. The more simulation will higher the safety performance of ACC system in unpredictable situation.
첨단안전장치 검사 환경 구축을 위한 차량동역학 모델링 및 검증
김진용(Jinyong Kim),정창현(Changhyun Jeong),정도현(Dohyun Jung),권영문(Yeongmun Gwon),유찬학(Chanhak Yu) 한국자동차공학회 2021 한국 자동차공학회논문집 Vol.29 No.9
As the number of vehicles equipped with advanced safety devices increases, cases of malfunction and inoperability are rapidly reported. As a result, research is being conducted on the inspection of advanced safety devices through virtual driving environments, mainly by public institutions. Real-time vehicle dynamics models similar to due diligence are essential for virtual driving environments. In this paper, a real-time vehicle dynamics model was developed through parts and vehicle characteristics tests in order to establish an advanced safety device inspection environment, and correlation was verified by comparing to real vehicle characteristics tests. The real vehicle correlation of the vehicle dynamics model was 97 %, which was very similar to a real vehicle behavior.