Simulation And Analysis Of Vehicle Electronic Stability Program Based On DYNAware

The electronic stability control system is a type of automotive active safetysystem, which is develop from Antilock Braking System(ABS) and TractionControl System(TCS).ESP can promptly control the brakes and the engine underextreme maneuvers to improve vehicle handling and driving safety. According topredecessor’s research, this paper mainly does research on establishment of vehiclemodel, control strategy and tuning parameters of PD controller based on geneticalgorithm.This paper establishes a parametric vehicle model based onDYNAware/ve-DYNA and set the corresponding simulation control model. Alsomake some modifications in the braking system and engine model according toactual needs. The basic principles of vehicle stability control were studiedtheoretically. Including the reason of instability, the mechanics theory of stabilitycontrol system and the influence of yaw rate and vehicle sideslip angle on vehiclestability. On this foundation, determine the control variables and calculate thenominal value. And combining with the sideslip angle phase plane theory, use thePD controller calculates the brake torque according to the deviation of yaw rate andthe deviation of sideslip angle. Then calculate the brake force of each wheelthrough the braking force distribution module. After complete the controller model,connect it with the vehicle model and verify the effectiveness of the controlstrategy by simulation on variety conditions. Finally, under different operatingconditions, tune the control parameters of PD controller by genetic algorithm toimprove adaptability of the controller. Design the genetic algorithm and make somechange in our own problem to improve search efficiency. Do simulation on twoconditions, and the results show that the method can make the controller adapt todifferent working condition, in other words the control parameters change with theoperating conditions.