Sliding mode control approaches are presented in this paper for the wheel slip control of road vehicles. The major design requirement for the controllers is to make the wheel slip ratio follow a desired value, while guaranteeing that the sliding mode control is stabilizing. Its robustness in front of matched and unmatched uncertainties and data transmission delays is assessed in simulation. In the present paper different algorithms of first and second order type and integral or non integral nature are discussed. Simulation results are reported and analyzed, putting into evidence the superior performance, in the considered automotive context, of the integral sliding mode control.
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