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International Journal of Automotive Technology > Volume 13(3); 2012 > Article
International Journal of Automotive Technology 2012;13(3): 441-450.
PID PLUS FUZZY LOGIC METHOD FOR TORQUE CONTROL IN TRACTION CONTROL SYSTEM
C. WIJAYA1, L. LI1, L. HE1, M.-X. KANG2, J. SONG1, L.-Y. YU1, C. WU1
1Tsinghua University
2Yanshan University
ABSTRACT
A Traction Control System (TCS) is used to control the driving force of an engine to prevent excessive slip when a vehicle starts suddenly or accelerates. The torque control strategy determines the driving performance of the vehicle under various drive-slip conditions. This paper presents a new torque control method for various drive-slip conditions involving abrupt changes in the road friction. This method is based on a PID plus fuzzy logic controller for driving torque regulation, which consists of a PID controller and a fuzzy logic controller. The PID controller is the fundamental component that calculates the elementary torque for traction control. In addition, the fuzzy logic controller is the compensating component that compensates for the abrupt change in the road friction. The simulation results and the experimental vehicle tests have validated that the proposed controller is effective and robust. Compared with conventional PID controllers, the driving performance under the proposed controller is greatly improved.
Key Words: Traction control system, Slip control, Torque control, Fuzzy control, PID plus fuzzy control
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