Research on ABS logic sliding mode control method based on road surface recognition

摘要

The ABS (Anti-lock Braking System) control method develops along with the development of the control theory. Since ABS is a nonlinear system with parametric uncertainties, a sliding mode controller with variable structure has been established with the pavement recognition method based on the vehicle dynamics parameter analysis, so as to promote the robustness of system control. Moreover, the exponential reaching law has been also adopted to eliminate system chattering. Finally, a simulation analysis has been carried out on the braking conditions of pavements with high and low attachment coefficients. The results showed, in comparison to the logic threshold method and the sliding mode control without pavement recognition, a significant improvement on the braking effect has been witnessed through adopting the logic sliding-mode control approach based on pavement recognition; meanwhile, the braking time has dropped by 10% on average .