Anti Slippage Traction Control System based on Fuzzy Control to Improve Longitudinal Dynamic Performance

Mohammad S. Ghafouri, Kourosh H. Shirazi, and Amir Riahi


Vehicle dynamic, Traction control system, fuzzy control


Slippage between wheel and road is one of the most effective factors, which causes instability in vehicles leading, decreasing of max acceleration and dynamic stability, especially in slippery road. In this article, TCS is designed in order to prevent wheel slippage and obtaining maximum traction force and stability. To achieve this goal, it is used 8 DOF for dynamic modeling of vehicles and suspension system including: longitudinal, lateral, Yaw, Roll and 4 degree of freedom for wheel rotating. Additionally, engine is designed with considering three states which includes air mass of inlet manifold, engine speed and fuel flow. In addition, two transport delays from intake and ignition up to torque production. Fuel throttle and brake system are considered with the first order dynamic actuators. In continue, three types of controllers, consist of fuzzy fix and variable reference and PI controller, are designed. The results illustrated that in different road conditions (dry and slippery) fuzzy control system with variable reference can obtain maximum speed in shorter time.

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