Double Closed-loop Control Scheme of Yaw Rate for Active Front Steering System
نویسندگان
چکیده
Steering system is an important man-machine interface, for which transmits driver's lateral control intention to the vehicle. In order to improve the vehicle lateral stability, a double closed-loop control scheme of yaw rate for active front steering system was proposed in this paper. To investigate the control effects of the double closed-loop control scheme of yaw rate, a two degree-of-freedom (2DOF) vehicle model and brushless dc motor (BLDCM) model were built, as well as numerical simulations and virtual tests based on CarSim software were conducted at different limiting conditions. Results indicate that response delay of vehicle driving on the road with low adhesion coefficient could be reduced with the help of the proposed yaw rate control scheme, as well as effects of unexpected yaw disturbance on response characteristics of vehicle could be weakened effectively. Key-Words: Vehicle, active front steering, yaw rate control, brushless dc motor (BLDCM), double closedloop control, CarSim
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