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최성진(Sungjin Choi),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),곽병학(Byunghak Kwak),차항병(Hangbyong Cha) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since the car is more large - size and is faster, the driver's demand of the vehicle stability at the extreme driving condition generated by sudden steering, road condition, unexpected interface, and so on increases more. To confirm vehicle stability and handling performance, ESP system is being utilized. In this paper, we test the vehicle in various test mode. and propose the evaluation method for ESP characteristics in the extreme driving situation. The proposed evaluation method for ESP in this paper is expected to facilitate to develop the control logic and improve the performance of ESP system.
DC/DC 컨버터의 파라미터 변화를 고려한 구간분석법 기반 제어기 설계
최성진(Sungjin Choi) 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.10
By performing interval analysis on the system transfer function, we propose an improved method of control loop design for a DC/DC converter. In conventional design methods, the effect of system parameter change due to the specified range of operating conditions and production tolerances in power components should be checked a posteriori, because this may result in a transfer function shift and performance degradation. In the proposed method, a possible parameter change is considered a priori in the design step in order that the desired crossover frequency and sufficient phase margin can be achieved even in the worst case condition. As an illustrative example, a buck dc/dc converter is designed by two different methods and performance comparisons are performed to verify the feasibility of the proposed scheme.
샤시코너모듈 개발을 위한 부품의 내구 성능 예측에 대한 연구
최성진(Sungjin Choi),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),유영면(Yungmyun Yoo) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis comer modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules.<br/> In this paper, full vehicle simulations and tests are performed to acquire the design parameter of chassis comer module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules Also, real vehicle tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KATECH PG and it is used to test chassis comer modules at laboratory and simulate durability performance.<br/> All these results have been provided to module and parts company and make an important role to develop chassis comer modules.<br/>
샤시코너모듈 개발을 위한 부품의 내고 성능 예측에 대한 연구
최성진(Sungjin Choi),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),유영면(Yungmyun Yoo) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis corner modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules.<br/> In this paper, full vehicle simulations and tests are performed to acquire the design parameter of chassis corner module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules. Also, real vehicle tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KA TECH PG and it is used to test chassis corner modules at laboratory and simulate durability performance.<br/> All these results have been provided to module and parts company and make an important role to develop chassis corner modules.<br/>
토션빔액슬 성능 평가를 위한 해석 모델 검증에 관한 연구
최성진(Sungjin Choi),한상원(Sangwon Han),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),고형규(Hyunggyu Ko),이동재(Dongjae Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The torsion beam axle type is widely used in the rear suspension for small passenger cars due to low cost. good performance. etc. To develop the torsion beam axle. it is necessary to estimate of the characteristics of rear suspension from the design process. The characteristics estimation of the torsion beam axle is performed using FEM. dynamic simulation and is veri fied the real test. In this study. the natural frequency and roll stiffness of the torsion beam axil: were measured by FEM. and the reliability of the FE model was evaluated according to the comparison of test data. This study presents a unique method for the finite element modeling and analysis of the torsion beam axle. The results of the FEA were verified using test data.