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ABS를 위해 휠 속 피드백 만을 이용한 Extremum-Seeking Algorithm 기반 최대 마찰력 제어
유세선(Sesun You),김원희(Wonhee Kim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
In this paper, we propose a maximum friction control based on extremum-seeking algorithm using only wheel speed feedback for anti-lock braking system (ABS) in electric vehicles. In the proposed control strategy, the disturbance observer is designed to estimate the longitudinal tire-road friction. Based on the extremum-seeking algorithm, an optimal desired reference generator is designed, which provides optimal desired wheel speed in real-time to achieve the maximum tire-road friction, according to road surface conditions. A wheel speed tracking controller is developed to guarantee an upper bound of tracking errors. The performance of the proposed method is validated via simulations by using CarSim and MATLAB/Simulink for split road surface. The proposed method, which only employs a wheel speed sensor, achieves a shorter braking distance and stopping time in comparison with classical ABS.
최적 노면 마찰력 기반 Anti-lock Braking System 제어
하진우(Jinwoo Ha),유세선(Sesun You),김원희(Wonhee Kim) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
In this paper, we propose new anti-lock braking system(ABS) control technique using wheel cylinder pressure control. In the proposed control algorithm, the extended state observer estimates the longitudinal tire-road friction forces. Using these estimated value, the longitudinal tire-road friction forces are optimized by directly controlling wheel cylinder pressure based on the friction’s behavior. The performance of the proposed method is validated via hardware-in-the-loop simulation by using MATLAB/Simulink, Carsim and dSPACE vector tool for snow road. The proposed method presents a new method rather than slip ratio based control and can be further developed through various optimization algorithms.
슬라이딩 모드 제어기를 위한 외란관측기 설계 방법 및 분석
임재윤(Jaeyun Yim),유세선(Sesun You),김원희(Wonhee Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
본 논문에서는 sliding mode controller (SMC)와 disturbance observer (DOB)의 결합에 대한 리플 증폭 문제에 대해 분석하였고, low-pass filter를 이용하여 해결 방안을 제안하였다. 제안한 DOB는 성능 검증을 위해 기존 DOB와 비교 분석을 MATLAB/Simulink를 통해 시뮬레이션 환경에서 진행하였다.
전자식 동력 조향 장치를 위한 새로운 개념의 토크 제어기 설계
김관연(Gwanyeon Kim),유세선(sesun You),김원희(Wonhee Kim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
We propose torque controller for Electric-Power-Steering system (EPS) control method. Novel EPS model is proposed. To obtain robustness against external disturbance and model uncertainties, extended state observer (ESO) method is applied. State feedback method is used in controller applying novel EPS model. The additional ESOs are designed to estimate the driver torque and reaction torque. The proposed method is verified by MATLAB/Simulink.