基于模糊控制的汽车ESP系统仿真研究

首先运用MATLAB/SIMULINK软件建立了汽车参考模型及二自由度整车模型,其中轮胎模型采用"魔术公式";其次,针对汽车ESP系统的非线性、时变的特点,运用模糊控制原理,设计了基于质心侧偏角修正的横摆角速度模糊控制器,并对低附着路面蛇形工况的控制效果进行了仿真分析,结果表明基于质心侧偏角修正的横摆角速度模糊控制器可以很好地控制汽车的横摆角速度及质心侧偏角,使汽车能够按照驾驶员的意图行驶,提高汽车的侧向稳定性。

Study of Automobile ESP Based on Fuzzy Control

Vehicle reference model and vehicle model with two degree of freedom are set up at first which includes "the Magic formula" tire model.Then by using the MATLAB/SIMULINK software,it had been performed that the verification of emulation and analysis through the conversion from mathematic model to simulation model.In addition,using fuzzy control principle to direct at the nonlinear,time-varying characteristics of ESP system,a fuzzy controller has been designed which can control the feedback of yaw rate and side slip angle.After the completion of the simulation research conducted on the controller,the results show that the yaw rate and the side slip angle can be well controlled by it.The researches indicate the fuzzy controller can remarkably enhance the yaw rate and side slip angle,make the vehicle run according to the driver's intention and improve the vehicle stability.