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국형석(Hyung-Seok Kook),김형건(Hyoung-Gun Kim),조문환(Munhwan Cho),이강덕(Kang-Duck Ih) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
This study is concerned about extracting the road noise component of signal from vehicle’s interior noise based on traditional system identification methods. Two system identification methods are considered: one method in the frequency domain and another in the time domain. In the case of road noise extraction method based on frequency domain system identification method, proper matrix inversion strategy is investigated and causal and noncausal impulse response filters are compared. Appropriate data lengths for the frequency domain system identification method and for the time domain system identification method are investigated.
14자유도 전차량 모델 기반 섀시제어시스템 Dynamic Sensor 고장 검출 알고리즘 개발
최원섭(Wonsub Choi),이재훈(Jaehoon Lee),국형석(Hyung-Seok Kook),허승진(Seung-Jin Heo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
With the advent of the new technologies in electronics, vehicle dynamics, and sensors, intelligent chassis control systems have been widely adopted in vehicles, recently. These chassis control systems use various sensors to measure real-time signals from the operating vehicle on roads such as steering angle, wheel speeds, vehicle’s yaw rate and lateral acceleration. Therefore, an unexpected sensor fault in the chassis control system could lead to serious damage to the vehicle, and in serious cases could be threatening to the human safety. In the present article, a reliable sensor fault detection method is concerned. The sensor fault detection algorithm proposed in the present work is based on a full vehicle model developed in a previous work. The high fidelity modeling capability using analytical and empirical models based on 14 degree of freedom model and the real-time computation capability of the full vehicle model enable computed virtual sensor signals to be compared with the real sensor signals and even be substituted for in case of sensor fault. Detailed algorithm for the sensor fault detection is described, and simulated results for the cases of lateral acceleration sensor and yaw rate sensor faults are demonstrated in the present article.
이경훈(Kyunghun Lee),이용승(Yongseung Lee),이재훈(Jaehoon Lee),국형석(Hyung-Seok Kook),박기홍(Kihong Park),허승진(Seung-Jin Hoe) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Most of reference models for chassis controls usually have low level degree of freedom like a bicycle model. However, these models include some different value in real vehicle motion and have a difficulty to adapt new technology. In addition, it is not good for real time that very high level degree of freedom like multibody dynamic analysis programs because of their long solving time. So, I developed full vehicle dynamic model with suspension Kinematic system that has 14 degree of freedom with theoretical equations and experimental data. And model has been validated using CarSim and experimental result.
고자유도 기준차량 모델을 이용한 조종 안정성 제어시스템 성능 향상
이경훈(Kyunghun Lee),최형진(Hyungjeen Choi),노기한(Kihan Noh),이재훈(Jaehoon Lee),국형석(Hyung-Seok Kook),박기홍(Kihong Park),허승진(Seung-Jin Hoe) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
차량 제어 시스템에 적용되는 기준 모델인 2 DOF One-Track Mode은 극한 주행상황에서 차량의 거동을 표현하는데 한계가 있고 부싱류(Bushing), 댐퍼(Damper)와 조향계 컴플라이언스(Steering Complience)와 같은 차량의 비선형 요소들의 영향을 나타내지 못한다는 단점을 가지고 있다. 이를 보안하기 위해 본 논문에서는 이론적 모델에 시험적 적응식 프로세스를 결합시킨 고정도 차량동역학 모델(Adaptive-Hybrid High Fidelity Vehicle Dynamic Model)의 개념을 적용시킨 14DOF 전차량 모델을 기준 모델로 사용함으로써 극한 주행상황에서의 차량의 거동을 얼마나 정확히 표현하고 전자식 샤시 제어 시스템에 적용하였을 때 제어 성능 변화를 살펴보는데 목적을 두고 있다.