휠 다이나믹스를 이용한 ABS 제어 알고리즘 설계

In this paper, an anti-lock brake system(ABS) algorithm using wheel pressure sensors is proposed. The wheel pressure sensors are used to estimate the road friction coefficient, which sensors are used recently to smart cruise control system and a hybrid car. The road friction coefficient is the most important information to control the vehicle stability. Using the estimated road friction coefficient, the vehicle detects mu-transition situation such as high-to-low mu or low-to-high mu and split-mu situation easily. Also, the performance of the estimation for vehicle states such as vehicle speed and acceleration can be improved. Especially, it is efficient to control the left/right and front/rear wheel independently because the friction coefficient is estimated separately. The simulation has been performed to verify the robustness of the proposed ABS algorithm in a variety of road conditions which has different friction coefficients.