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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.
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.
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.