The Research Of Electrionic Stability Program Control Based On Direct Yaw Moment Control

When automobile steers on low adhesion coefficient at high speed,the sidepiece adhesion force of automobile easily reach high-point,which will have the vehicle lose dynamics stability and lead to accidents,because of influencing of motor turning or outside disturbance. Electronic Stability Program-ESP is a new initiative security control system,which can control the motion of the vehicle avoid accidents, according to the driver's purpose , road surface condition and status of vehicle,and the ESP can maximum limit improve the manipulation stability and steering security.Firstly ,the paper theoretically research the postulate of the ESP,including ESP system's development survey, structure composition and work process and so on. Profound revelation how the automobile Electronic Stability Program control system affects the manipulation stability. Secondly, considering the importance of turing characteristic steering security by tyre's non-linear characteristic,the paper adopt Gim tyre model,which is speedly, better adaptability and high precision. Besides, upbuilding seven liberty degree automobile model and two liberty degree automobile referrence model.Then,founding planar fuzzy controller about transverse swing cornu speed and Centroid secund cornu,and acomplish conversion from mathematical mathematics model to emulational model ueing MATLAB/SIMULINK.F-inally, in steering wheel angle limit operating modes and under step-input and sine input conducts,completing simulation confirmation research to automobile's operation stability.The findings indicated, the fuzzy controller accords the control requirement, and under the ESP system's control, automobile's center of mass side angle of deflection and the sway angular speed was defined to a quite small scope, the automobile can travel defering to the front wheel corner path, thus the ESP can enhance automobile's operation stability.