Application of Side-Slip Angle Phasigram to Vehicle ESC System

Based on seven freedom vehicle model and uni-tire model, the stable zone boundary of side-slip angle phasigram was acquired. The relation of boundary with vehicle velocity and road friction coefficient was obtained. The side-slip angle phasigram stable zone boundary was applied in electronic stability control (ESC) system. The simulation was carried out under veDYNA/Simulink environment. Compared with control logic based on ideal yaw rate, the stable zone boundary method could follow the ideal trajectory obviously better. The acquired stable zone could also provide a means of evaluation in vehicle stability research.