Study on Self-Tuning Tyre Friction Control

摘要

This paper focuses on longitudinal self-tuning tyre friction control by regulating desired λ* in different road conditions.The longitudinal friction coefficient is modeled by the Magic Formula and its key parameters under different road surfaces are identified online using the proposed constrained hyhrid genetic algorithm(GA).By means of this,for a specific desired tyre friction,the corresponding control objective of slip ratio can be obtained via a numerical method.A nonsingular and fast terminal sliding mode(NFTSM) control method is then employed to track the desired slip ratio,as Longitudinal Slip ratio Control(LSC).Evidently,the ahove serial algorithms of parameter evaluation,optimization and control adapt to,or self-tune with,the variation of road surfaces.Simulation experiments support this conclusion,in which,the tyre friction was tracked precisely and rapidly and the requirement of self-tuning with road surface variation was satisfied.