Abstract
Traction control is an active vehicle safety feature designed to help vehicles makeeffective use of all the traction available on the road when accelerating on lowfrictionroad surfaces. TCS becomes increasingly important to maintain the driver'scontrollability of the vehicle to enhance the driving experience under different roadconditions and avoid road crashes by correcting human errors. This paper utilizes theusage of PID, sliding mode and super twisting sliding mode controllers with anonlinear observer to obtain traction control for electric vehicles. The results of thesimulation illustrate the success of the controllers to operate the vehicle at the desiredwheel slip ratio. When a sudden change occurs, a super twisting controller yields thebest control performance comparing to the other systems. A novel unified structure isused to estimate tire forces by using a nonlinear observer. The independence of theestimates from the vehicle tire model is the reason for the novelty of this structure.
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