汽车ESP系统控制策略的仿真研究

摘要

An 8 DOF vehicle dynamics model based on magic formula tire model is established with Matlab/Simulink. In view of the nonlinear and time varying features of ESP system, a combined fuzzy controller based on yaw rate and mass center sideslip angle is designed. An active torque distribution strategy of additional yaw moment is pro-posed and a simulation on instability-prone wet-slippery road surface with typical working conditions is conducted. The results show that the designed controller and proposed strategy can achieve better control of vehicle stability.%在Matlab/Simulink中建立了“魔术公式”轮胎模型和8自由度整车动力学模型。针对ESP系统的非线性时变特性，设计了基于横摆角速度和质心侧偏角的联合模糊控制器，提出了附加横摆力矩的转矩主动分配策略，并在易于失稳的湿滑路面上进行了典型工况的仿真。结果表明：所设计的控制器和提出的分配策略可以实现对车辆稳定性的较好控制。