Switched second order sliding mode for wheel slip control of road vehicles

Longitudinal wheel slip control is a crucial problem in automotive systems, as it it is the basis for traction, braking and stability control. As slip dynamics are critically dependent on the vehicle speed, it is interesting to devise an adaptation of the controller parameters with respect to this variable. To achieve this, the present paper proposes a novel switched second order sliding mode (S-SOSM) control strategy, which allows to enhance the closed-loop performance and tune it to the current working condition.